Commit Graph

20624 Commits

Author SHA1 Message Date
Felipe Balbi
726b4fba94 usb: dwc3: of-simple: add a shutdown
In case we're loading a new kernel via kexec, let's make sure to
cleanup the dwc3 address space correctly. This means that we should
run the same steps from driver remove, so just extract a reusable
function for both cases.

Signed-off-by: Felipe Balbi <felipe.balbi@linux.intel.com>
2019-10-29 12:56:11 +02:00
Roger Quadros
387c359b84 usb: cdns3: Add TI specific wrapper driver
The J721e platform comes with 2 Cadence USB3 controller
instances. This driver supports the TI specific wrapper
on this platform.

Signed-off-by: Roger Quadros <rogerq@ti.com>
Signed-off-by: Sekhar Nori <nsekhar@ti.com>
Reviewed-by: Pawel Laszczak <pawell@cadence.com>
Signed-off-by: Felipe Balbi <felipe.balbi@linux.intel.com>
2019-10-29 12:55:09 +02:00
Chunfeng Yun
f3088e6a12 usb: mtu3: fix race condition about delayed_status
usb_composite_setup_continue() may be called before composite_setup()
return USB_GADGET_DELAYED_STATUS, then the controller driver will
delay status stage after composite_setup() finish, but the class driver
don't ask the controller to continue delayed status anymore, this will
cause control transfer timeout.

happens when use mass storage (also enabled other class driver):

cpu1:                               cpu2
handle_setup(SET_CONFIG) //gadget driver
  unlock (g->lock)
  gadget_driver->setup()
    composite_setup()
      lock(cdev->lock)
        set_config()
          fsg_set_alt() // maybe some times due to many class are enabled
            raise FSG_STATE_CONFIG_CHANGE
            return USB_GADGET_DELAYED_STATUS
                                    handle_exception()
                                    usb_composite_setup_continue()
      unlock(cdev->lock)
                                      lock(cdev->lock)
                                        ep0_queue()
                                          lock (g->lock)
                                          //no delayed status, nothing todo
                                          unlock (g->lock)
                                      unlock(cdev->lock)
    return USB_GADGET_DELAYED_STATUS // composite_setup
  lock (g->lock)
get USB_GADGET_DELAYED_STATUS //handle_setup [1]

Try to fix the race condition as following:
After the driver gets USB_GADGET_DELAYED_STATUS at [1], if we find
there is a usb_request in ep0 request list, it means composite already
asked us to continue delayed status by usb_composite_setup_continue(),
so we skip request about delayed_status by composite_setup() and still
do status stage.

Signed-off-by: Chunfeng Yun <chunfeng.yun@mediatek.com>
Signed-off-by: Felipe Balbi <felipe.balbi@linux.intel.com>
2019-10-23 09:26:29 +03:00
Nagarjuna Kristam
49db427232 usb: gadget: Add UDC driver for tegra XUSB device mode controller
This patch adds UDC driver for tegra XUSB 3.0 device mode controller.
XUSB device mode controller supports SS, HS and FS modes

Based on work by:
  Mark Kuo <mkuo@nvidia.com>
  Hui Fu <hfu@nvidia.com>
  Andrew Bresticker <abrestic@chromium.org>

Signed-off-by: Nagarjuna Kristam <nkristam@nvidia.com>
Acked-by: Thierry Reding <treding@nvidia.com>
Signed-off-by: Felipe Balbi <felipe.balbi@linux.intel.com>
2019-10-23 09:25:58 +03:00
Thinh Nguyen
038761ce68 usb: dwc3: debug: Remove newline printout
The newline from the unknown link state tracepoint doesn't follow the
other tracepoints, and it looks unsightly. Let's remove it.

Signed-off-by: Thinh Nguyen <thinhn@synopsys.com>
Signed-off-by: Felipe Balbi <felipe.balbi@linux.intel.com>
2019-10-23 09:25:08 +03:00
Mathias Kresin
6689f0f4bb usb: dwc2: use a longer core rest timeout in dwc2_core_reset()
Testing on different generations of Lantiq MIPS SoC based boards, showed
that it takes up to 1500 us until the core reset bit is cleared.

The driver from the vendor SDK (ifxhcd) uses a 1 second timeout. Use the
same timeout to fix wrong hang detections and make the driver work for
Lantiq MIPS SoCs.

At least till kernel 4.14 the hanging reset only caused a warning but
the driver was probed successful. With kernel 4.19 errors out with
EBUSY.

Cc: linux-stable <stable@vger.kernel.org> # 4.19+
Signed-off-by: Mathias Kresin <dev@kresin.me>
Signed-off-by: Felipe Balbi <felipe.balbi@linux.intel.com>
2019-10-22 10:42:08 +03:00
Markus Elfring
a9a367d0ad usb: gadget: udc: lpc32xx: Use devm_platform_ioremap_resource() in lpc32xx_udc_probe()
Simplify this function implementation by using a known wrapper function.

This issue was detected by using the Coccinelle software.

Signed-off-by: Markus Elfring <elfring@users.sourceforge.net>
Signed-off-by: Felipe Balbi <felipe.balbi@linux.intel.com>
2019-10-22 10:41:06 +03:00
Colin Ian King
5a15007747 USB: gadget: udc: clean up an indentation issue
There is a statement that is indented too deeply, remove
the extraneous tabs.

Signed-off-by: Colin Ian King <colin.king@canonical.com>
Signed-off-by: Felipe Balbi <felipe.balbi@linux.intel.com>
2019-10-22 10:40:15 +03:00
Joel Stanley
1cbfb8c4f6 usb: gadget: Quieten gadget config message
On a system that often re-configures a USB gadget device the kernel log
is filled with:

  configfs-gadget gadget: high-speed config #1: c

Reduce the verbosity of this print to debug.

Signed-off-by: Joel Stanley <joel@jms.id.au>
Signed-off-by: Felipe Balbi <felipe.balbi@linux.intel.com>
2019-10-22 10:40:09 +03:00
zhengbin
e804cd46b2 usb: gadget: Remove set but not used variable 'opts' in msg_do_config
Fixes gcc '-Wunused-but-set-variable' warning:

drivers/usb/gadget/legacy/mass_storage.c: In function msg_do_config:
drivers/usb/gadget/legacy/mass_storage.c:108:19: warning: variable opts set but not used [-Wunused-but-set-variable]

It is not used since commit f78bbcae86 ("usb: f_mass_storage:
test whether thread is running before starting another")

Reported-by: Hulk Robot <hulkci@huawei.com>
Signed-off-by: zhengbin <zhengbin13@huawei.com>
Signed-off-by: Felipe Balbi <felipe.balbi@linux.intel.com>
2019-10-22 10:39:04 +03:00
zhengbin
6973dbdd1c usb: gadget: Remove set but not used variable 'opts' in acm_ms_do_config
Fixes gcc '-Wunused-but-set-variable' warning:

drivers/usb/gadget/legacy/acm_ms.c: In function acm_ms_do_config:
drivers/usb/gadget/legacy/acm_ms.c:108:19: warning: variable opts set but not used [-Wunused-but-set-variable]

It is not used since commit f78bbcae86 ("usb: f_mass_storage:
test whether thread is running before starting another")

Reported-by: Hulk Robot <hulkci@huawei.com>
Signed-off-by: zhengbin <zhengbin13@huawei.com>
Signed-off-by: Felipe Balbi <felipe.balbi@linux.intel.com>
2019-10-22 10:39:01 +03:00
Chunfeng Yun
e6fda6e69d usb: mtu3: add a new function to do status stage
Exact a new static function to do status stage

Signed-off-by: Chunfeng Yun <chunfeng.yun@mediatek.com>
Signed-off-by: Felipe Balbi <felipe.balbi@linux.intel.com>
2019-10-22 10:38:53 +03:00
Peter Chen
3654aaa922 usb: gadget: configfs: fix concurrent issue between composite APIs
We meet several NULL pointer issues if configfs_composite_unbind
and composite_setup (or composite_disconnect) are running together.
These issues occur when do the function switch stress test, the
configfs_compsoite_unbind is called from user mode by
echo "" to /sys/../UDC entry, and meanwhile, the setup interrupt
or disconnect interrupt occurs by hardware. The composite_setup
will get the cdev from get_gadget_data, but configfs_composite_unbind
will set gadget data as NULL, so the NULL pointer issue occurs.
This concurrent is hard to reproduce by native kernel, but can be
reproduced by android kernel.

In this commit, we introduce one spinlock belongs to structure
gadget_info since we can't use the same spinlock in usb_composite_dev
due to exclusive running together between composite_setup and
configfs_composite_unbind. And one bit flag 'unbind' to indicate the
code is at unbind routine, this bit is needed due to we release the
lock at during configfs_composite_unbind sometimes, and composite_setup
may be run at that time.

Several oops:

oops 1:
android_work: sent uevent USB_STATE=CONNECTED
configfs-gadget gadget: super-speed config #1: b
android_work: sent uevent USB_STATE=CONFIGURED
init: Received control message 'start' for 'adbd' from pid: 3515 (system_server)
Unable to handle kernel NULL pointer dereference at virtual address 0000002a
init: Received control message 'stop' for 'adbd' from pid: 3375 (/vendor/bin/hw/android.hardware.usb@1.1-servic)
Mem abort info:
  Exception class = DABT (current EL), IL = 32 bits
  SET = 0, FnV = 0
  EA = 0, S1PTW = 0
Data abort info:
  ISV = 0, ISS = 0x00000004
  CM = 0, WnR = 0
user pgtable: 4k pages, 48-bit VAs, pgd = ffff8008f1b7f000
[000000000000002a] *pgd=0000000000000000
Internal error: Oops: 96000004 [#1] PREEMPT SMP
Modules linked in:
CPU: 4 PID: 2457 Comm: irq/125-5b11000 Not tainted 4.14.98-07846-g0b40a9b-dirty #16
Hardware name: Freescale i.MX8QM MEK (DT)
task: ffff8008f2a98000 task.stack: ffff00000b7b8000
PC is at composite_setup+0x44/0x1508
LR is at android_setup+0xb8/0x13c
pc : [<ffff0000089ffb3c>] lr : [<ffff000008a032fc>] pstate: 800001c5
sp : ffff00000b7bbb80
x29: ffff00000b7bbb80 x28: ffff8008f2a3c010
x27: 0000000000000001 x26: 0000000000000000                                                          [1232/1897]
audit: audit_lost=25791 audit_rate_limit=5 audit_backlog_limit=64
x25: 00000000ffffffa1 x24: ffff8008f2a3c010
audit: rate limit exceeded
x23: 0000000000000409 x22: ffff000009c8e000
x21: ffff8008f7a8b428 x20: ffff00000afae000
x19: ffff0000089ff000 x18: 0000000000000000
x17: 0000000000000000 x16: ffff0000082b7c9c
x15: 0000000000000000 x14: f1866f5b952aca46
x13: e35502e30d44349c x12: 0000000000000008
x11: 0000000000000008 x10: 0000000000000a30
x9 : ffff00000b7bbd00 x8 : ffff8008f2a98a90
x7 : ffff8008f27a9c90 x6 : 0000000000000001
x5 : 0000000000000000 x4 : 0000000000000001
x3 : 0000000000000000 x2 : 0000000000000006
x1 : ffff0000089ff8d0 x0 : 732a010310b9ed00

X7: 0xffff8008f27a9c10:
9c10  00000002 00000000 00000001 00000000 13110000 ffff0000 00000002 00208040
9c30  00000000 00000000 00000000 00000000 00000000 00000005 00000029 00000000
9c50  00051778 00000001 f27a8e00 ffff8008 00000005 00000000 00000078 00000078
9c70  00000078 00000000 09031d48 ffff0000 00100000 00000000 00400000 00000000
9c90  00000001 00000000 00000000 00000000 00000000 00000000 ffefb1a0 ffff8008
9cb0  f27a9ca8 ffff8008 00000000 00000000 b9d88037 00000173 1618a3eb 00000001
9cd0  870a792a 0000002e 16188fe6 00000001 0000242b 00000000 00000000 00000000
using random self ethernet address
9cf0  019a4646 00000000 000547f3 00000000 ecfd6c33 00000002 00000000
using random host ethernet address
 00000000

X8: 0xffff8008f2a98a10:
8a10  00000000 00000000 f7788d00 ffff8008 00000001 00000000 00000000 00000000
8a30  eb218000 ffff8008 f2a98000 ffff8008 f2a98000 ffff8008 09885000 ffff0000
8a50  f34df480 ffff8008 00000000 00000000 f2a98648 ffff8008 09c8e000 ffff0000
8a70  fff2c800 ffff8008 09031d48 ffff0000 0b7bbd00 ffff0000 0b7bbd00 ffff0000
8a90  080861bc ffff0000 00000000 00000000 00000000 00000000 00000000 00000000
8ab0  00000000 00000000 00000000 00000000 00000000 00000000 00000000 00000000
8ad0  00000000 00000000 00000000 00000000 00000000 00000000 00000000 00000000
8af0  00000000 00000000 00000000 00000000 00000000 00000000 00000000 00000000

X21: 0xffff8008f7a8b3a8:
b3a8  00000000 00000000 00000000 00000000 00000000 00000000 00000000 00000000
b3c8  00000000 00000000 00000000 00000000 00000000 00000000 00000000 00000000
b3e8  00000000 00000000 00000000 00000000 00000000 00000000 00000000 00000000
b408  00000000 00000000 00000000 00000000 00000000 00000000 00000001 00000000
b428  00000000 00000000 00000000 00000000 00000000 00000000 00000000 00000000
b448  0053004d 00540046 00300031 00010030 eb07b520 ffff8008 20011201 00000003
b468  e418d109 0104404e 00010302 00000000 eb07b558 ffff8008 eb07b558 ffff8008
b488  f7a8b488 ffff8008 f7a8b488 ffff8008 f7a8b300 ffff8008 00000000 00000000

X24: 0xffff8008f2a3bf90:
bf90  00000000 00000000 00000000 00000000 00000000 00000000 00000000 00000000
bfb0  00000000 00000000 00000000 00000000 00000000 00000000 00000000 00000000
bfd0  00000000 00000000 00000000 00000000 00000000 00000000 00000000 00000000
bff0  00000000 00000000 00000000 00000000 f76c8010 ffff8008 f76c8010 ffff8008
c010  00000000 00000000 f2a3c018 ffff8008 f2a3c018 ffff8008 08a067dc ffff0000
c030  f2a5a000 ffff8008 091c3650 ffff0000 f716fd18 ffff8008 f716fe30 ffff8008
c050  f2ce4a30 ffff8008 00000000 00000005 00000000 00000000 095d1568 ffff0000
c070  f76c8010 ffff8008 f2ce4b00 ffff8008 095cac68 ffff0000 f2a5a028 ffff8008

X28: 0xffff8008f2a3bf90:
bf90  00000000 00000000 00000000 00000000 00000000 00000000 00000000 00000000
bfb0  00000000 00000000 00000000 00000000 00000000 00000000 00000000 00000000
bfd0  00000000 00000000 00000000 00000000 00000000 00000000 00000000 00000000
bff0  00000000 00000000 00000000 00000000 f76c8010 ffff8008 f76c8010 ffff8008
c010  00000000 00000000 f2a3c018 ffff8008 f2a3c018 ffff8008 08a067dc ffff0000
c030  f2a5a000 ffff8008 091c3650 ffff0000 f716fd18 ffff8008 f716fe30 ffff8008
c050  f2ce4a30 ffff8008 00000000 00000005 00000000 00000000 095d1568 ffff0000
c070  f76c8010 ffff8008 f2ce4b00 ffff8008 095cac68 ffff0000 f2a5a028 ffff8008

Process irq/125-5b11000 (pid: 2457, stack limit = 0xffff00000b7b8000)
Call trace:
Exception stack(0xffff00000b7bba40 to 0xffff00000b7bbb80)
ba40: 732a010310b9ed00 ffff0000089ff8d0 0000000000000006 0000000000000000
ba60: 0000000000000001 0000000000000000 0000000000000001 ffff8008f27a9c90
ba80: ffff8008f2a98a90 ffff00000b7bbd00 0000000000000a30 0000000000000008
baa0: 0000000000000008 e35502e30d44349c f1866f5b952aca46 0000000000000000
bac0: ffff0000082b7c9c 0000000000000000 0000000000000000 ffff0000089ff000
bae0: ffff00000afae000 ffff8008f7a8b428 ffff000009c8e000 0000000000000409
bb00: ffff8008f2a3c010 00000000ffffffa1 0000000000000000 0000000000000001
bb20: ffff8008f2a3c010 ffff00000b7bbb80 ffff000008a032fc ffff00000b7bbb80
bb40: ffff0000089ffb3c 00000000800001c5 ffff00000b7bbb80 732a010310b9ed00
bb60: ffffffffffffffff ffff0000080f777c ffff00000b7bbb80 ffff0000089ffb3c
[<ffff0000089ffb3c>] composite_setup+0x44/0x1508
[<ffff000008a032fc>] android_setup+0xb8/0x13c
[<ffff0000089bd9a8>] cdns3_ep0_delegate_req+0x44/0x70
[<ffff0000089bdff4>] cdns3_check_ep0_interrupt_proceed+0x33c/0x654
[<ffff0000089bca44>] cdns3_device_thread_irq_handler+0x4b0/0x4bc
[<ffff0000089b77b4>] cdns3_thread_irq+0x48/0x68
[<ffff000008145bf0>] irq_thread_fn+0x28/0x88
[<ffff000008145e38>] irq_thread+0x13c/0x228
[<ffff0000080fed70>] kthread+0x104/0x130
[<ffff000008085064>] ret_from_fork+0x10/0x18

oops2:
composite_disconnect: Calling disconnect on a Gadget that is                      not connected
android_work: did not send uevent (0 0           (null))
init: Received control message 'stop' for 'adbd' from pid: 3359 (/vendor/bin/hw/android.hardware.usb@1.1-service.imx)
init: Sending signal 9 to service 'adbd' (pid 22343) process group...
------------[ cut here ]------------
audit: audit_lost=180038 audit_rate_limit=5 audit_backlog_limit=64
audit: rate limit exceeded
WARNING: CPU: 0 PID: 3468 at kernel_imx/drivers/usb/gadget/composite.c:2009 composite_disconnect+0x80/0x88
Modules linked in:
CPU: 0 PID: 3468 Comm: HWC-UEvent-Thre Not tainted 4.14.98-07846-g0b40a9b-dirty #16
Hardware name: Freescale i.MX8QM MEK (DT)
task: ffff8008f2349c00 task.stack: ffff00000b0a8000
PC is at composite_disconnect+0x80/0x88
LR is at composite_disconnect+0x80/0x88
pc : [<ffff0000089ff9b0>] lr : [<ffff0000089ff9b0>] pstate: 600001c5
sp : ffff000008003dd0
x29: ffff000008003dd0 x28: ffff8008f2349c00
x27: ffff000009885018 x26: ffff000008004000
Timeout for IPC response!
x25: ffff000009885018 x24: ffff000009c8e280
x23: ffff8008f2d98010 x22: 00000000000001c0
x21: ffff8008f2d98394 x20: ffff8008f2d98010
x19: 0000000000000000 x18: 0000e3956f4f075a
fxos8700 4-001e: i2c block read acc failed
x17: 0000e395735727e8 x16: ffff00000829f4d4
x15: ffffffffffffffff x14: 7463656e6e6f6320
x13: 746f6e2009090920 x12: 7369207461687420
x11: 7465676461472061 x10: 206e6f207463656e
x9 : 6e6f637369642067 x8 : ffff000009c8e280
x7 : ffff0000086ca6cc x6 : ffff000009f15e78
x5 : 0000000000000000 x4 : 0000000000000000
x3 : ffffffffffffffff x2 : c3f28b86000c3900
x1 : c3f28b86000c3900 x0 : 000000000000004e

X20: 0xffff8008f2d97f90:
7f90  00000000 00000000 00000000 00000000 00000000 00000000 00000000 00000000
7fb0  00000000 00000000 00000000 00000000 00000000 00000000 00000000 00000000
libprocessgroup: Failed to kill process cgroup uid 0 pid 22343 in 215ms, 1 processes remain
7fd0
Timeout for IPC response!
 00000000 00000000 00000000 00000000 00000000 00000000 00000000 00000000
using random self ethernet address
7ff0  00000000 00000000 00000000 00000000 f76c8010 ffff8008 f76c8010 ffff8008
8010  00000100 00000000 f2d98018 ffff8008 f2d98018 ffff8008 08a067dc
using random host ethernet address
 ffff0000
8030  f206d800 ffff8008 091c3650 ffff0000 f7957b18 ffff8008 f7957730 ffff8008
8050  f716a630 ffff8008 00000000 00000005 00000000 00000000 095d1568 ffff0000
8070  f76c8010 ffff8008 f716a800 ffff8008 095cac68 ffff0000 f206d828 ffff8008

X21: 0xffff8008f2d98314:
8314  ffff8008 00000000 00000000 00000000 00000000 00000000 00000000 00000000
8334  00000000 00000000 00000000 00000000 00000000 08a04cf4 ffff0000 00000000
8354  00000000 00000000 00000000 00000000 00000000 00000000 00000000 00000000
8374  00000000 00000000 00000000 00001001 00000000 00000000 00000000 00000000
8394  e4bbe4bb 0f230000 ffff0000 0afae000 ffff0000 ae001000 00000000 f206d400
Timeout for IPC response!
83b4  ffff8008 00000000 00000000 f7957b18 ffff8008 f7957718 ffff8008 f7957018
83d4  ffff8008 f7957118 ffff8008 f7957618 ffff8008 f7957818 ffff8008 f7957918
83f4  ffff8008 f7957d18 ffff8008 00000000 00000000 00000000 00000000 00000000

X23: 0xffff8008f2d97f90:
7f90  00000000 00000000 00000000 00000000 00000000 00000000 00000000 00000000
7fb0  00000000 00000000 00000000 00000000 00000000 00000000 00000000 00000000
7fd0  00000000 00000000 00000000 00000000 00000000 00000000 00000000 00000000
7ff0  00000000 00000000 00000000 00000000 f76c8010 ffff8008 f76c8010 ffff8008
8010  00000100 00000000 f2d98018 ffff8008 f2d98018 ffff8008 08a067dc ffff0000
8030  f206d800 ffff8008 091c3650 ffff0000 f7957b18 ffff8008 f7957730 ffff8008
8050  f716a630 ffff8008 00000000 00000005 00000000 00000000 095d1568 ffff0000
8070  f76c8010 ffff8008 f716a800 ffff8008 095cac68 ffff0000 f206d828 ffff8008

X28: 0xffff8008f2349b80:
9b80  00000000 00000000 00000000 00000000 00000000 00000000 00000000 00000000
9ba0  00000000 00000000 00000000 00000000 00000000 00000000 00000000 00000000
9bc0  00000000 00000000 00000000 00000000 00000000 00000000 00000000 00000000
9be0  00000000 00000000 00000000 00000000 00000000 00000000 00000000 00000000
9c00  00000022 00000000 ffffffff ffffffff 00010001 00000000 00000000 00000000
9c20  0b0a8000 ffff0000 00000002 00404040 00000000 00000000 00000000 00000000
9c40  00000001 00000000 00000001 00000000 001ebd44 00000001 f390b800 ffff8008
9c60  00000000 00000001 00000070 00000070 00000070 00000000 09031d48 ffff0000

Call trace:
Exception stack(0xffff000008003c90 to 0xffff000008003dd0)
3c80:                                   000000000000004e c3f28b86000c3900
3ca0: c3f28b86000c3900 ffffffffffffffff 0000000000000000 0000000000000000
3cc0: ffff000009f15e78 ffff0000086ca6cc ffff000009c8e280 6e6f637369642067
3ce0: 206e6f207463656e 7465676461472061 7369207461687420 746f6e2009090920
3d00: 7463656e6e6f6320 ffffffffffffffff ffff00000829f4d4 0000e395735727e8
3d20: 0000e3956f4f075a 0000000000000000 ffff8008f2d98010 ffff8008f2d98394
3d40: 00000000000001c0 ffff8008f2d98010 ffff000009c8e280 ffff000009885018
3d60: ffff000008004000 ffff000009885018 ffff8008f2349c00 ffff000008003dd0
3d80: ffff0000089ff9b0 ffff000008003dd0 ffff0000089ff9b0 00000000600001c5
3da0: ffff8008f33f2cd8 0000000000000000 0000ffffffffffff 0000000000000000
init: Received control message 'start' for 'adbd' from pid: 3359 (/vendor/bin/hw/android.hardware.usb@1.1-service.imx)
3dc0: ffff000008003dd0 ffff0000089ff9b0
[<ffff0000089ff9b0>] composite_disconnect+0x80/0x88
[<ffff000008a044d4>] android_disconnect+0x3c/0x68
[<ffff0000089ba9f8>] cdns3_device_irq_handler+0xfc/0x2c8
[<ffff0000089b84c0>] cdns3_irq+0x44/0x94
[<ffff00000814494c>] __handle_irq_event_percpu+0x60/0x24c
[<ffff000008144c0c>] handle_irq_event+0x58/0xc0
[<ffff00000814873c>] handle_fasteoi_irq+0x98/0x180
[<ffff000008143a10>] generic_handle_irq+0x24/0x38
[<ffff000008144170>] __handle_domain_irq+0x60/0xac
[<ffff0000080819c4>] gic_handle_irq+0xd4/0x17c

Cc: Andrzej Pietrasiewicz <andrzejtp2010@gmail.com>
Signed-off-by: Peter Chen <peter.chen@nxp.com>
Signed-off-by: Felipe Balbi <felipe.balbi@linux.intel.com>
2019-10-22 10:38:39 +03:00
Jayshri Pawar
0b8b1a1fed usb: gadget: f_tcm: Provide support to get alternate setting in tcm function
Providing tcm_get_alt in tcm function to support Bulk only protocol and
USB Attached SCSI protocol

Signed-off-by: Jayshri Pawar <jpawar@cadence.com>
Signed-off-by: Felipe Balbi <felipe.balbi@linux.intel.com>
2019-10-22 10:37:29 +03:00
Nikhil Badola
75eaa498c9 usb: gadget: Correct NULL pointer checking in fsl gadget
Correct NULL pointer checking for endpoint descriptor
before it gets dereferenced

Signed-off-by: Nikhil Badola <nikhil.badola@freescale.com>
Signed-off-by: Ran Wang <ran.wang_1@nxp.com>
Reviewed-by: Peter Chen <peter.chen@nxp.com>
Signed-off-by: Felipe Balbi <felipe.balbi@linux.intel.com>
2019-10-22 10:37:20 +03:00
Nikhil Badola
eb23c8b4fd usb: fsl: Remove unused variable
Remove unused variable td_complete

Signed-off-by: Nikhil Badola <nikhil.badola@freescale.com>
Reviewed-by: Ran Wang <ran.wang_1@nxp.com>
Reviewed-by: Peter Chen <peter.chen@nxp.com>
Signed-off-by: Felipe Balbi <felipe.balbi@linux.intel.com>
2019-10-22 10:37:17 +03:00
Andrey Konovalov
15ac1d99b8 USB: dummy-hcd: use usb_urb_dir_in instead of usb_pipein
Commit fea3409112 ("USB: add direction bit to urb->transfer_flags") has
added a usb_urb_dir_in() helper function that can be used to determine
the direction of the URB. With that patch USB_DIR_IN control requests with
wLength == 0 are considered out requests by real USB HCDs. This patch
changes dummy-hcd to use the usb_urb_dir_in() helper to match that
behavior.

Signed-off-by: Andrey Konovalov <andreyknvl@google.com>
Signed-off-by: Felipe Balbi <felipe.balbi@linux.intel.com>
2019-10-22 10:36:03 +03:00
Andrey Konovalov
1bff4a4e66 USB: dummy-hcd: increase max number of devices to 32
When fuzzing the USB subsystem with syzkaller, we currently use 8 testing
processes within one VM. To isolate testing processes from one another it
is desirable to assign a dedicated USB bus to each of those, which means
we need at least 8 Dummy UDC/HCD devices.

This patch increases the maximum number of Dummy UDC/HCD devices to 32
(more than 8 in case we need more of them in the future).

Signed-off-by: Andrey Konovalov <andreyknvl@google.com>
Signed-off-by: Felipe Balbi <felipe.balbi@linux.intel.com>
2019-10-22 10:36:00 +03:00
Veeraiyan Chidambaram
f2b06c9539 usb: renesas_usbhs: add suspend event support in gadget mode
When R-Car Gen3 USB 2.0 is in Gadget mode, if host is detached an interrupt
will be generated and Suspended state bit is set in interrupt status
register. Interrupt handler will call driver->suspend(composite_suspend)
if suspended state bit is set. composite_suspend will call
ffs_func_suspend which will post FUNCTIONFS_SUSPEND and will be consumed
by user space application via /dev/ep0.

To be able to detect host detach, extend the DVSQ_MASK to cover the
Suspended bit of the DVSQ[2:0] bitfield from the Interrupt Status
Register 0 (INTSTS0) register and perform appropriate action in the
DVST interrupt handler (usbhsg_irq_dev_state).

Without this commit, disconnection of the phone from R-Car H3 ES2.0
Salvator-X CN9 port is not recognized and reverse role switch does
not not happen. If phone is connected again it does not enumerate.

With this commit, disconnection will be recognized and reverse role
switch will happen by a user space application. If phone is connected
again it will enumerate properly and will become visible in the output
of 'lsusb'.

Signed-off-by: Veeraiyan Chidambaram <veeraiyan.chidambaram@in.bosch.com>
Signed-off-by: Eugeniu Rosca <erosca@de.adit-jv.com>
Signed-off-by: Felipe Balbi <felipe.balbi@linux.intel.com>
2019-10-22 10:31:08 +03:00
Eugeniu Rosca
d2802865f7 usb: renesas_usbhs: simplify usbhs_status_get_device_state()
Similar to usbhs_status_get_ctrl_stage(), *_get_device_state() is not
supposed to return any error code since its return value is the DVSQ
bitfield of the INTSTS0 register. According to SoC HW manual rev1.00,
every single value of DVSQ[2:0] is valid and none is an error:

----8<----
Device State
000: Powered state
001: Default state
010: Address state
011: Configuration state
1xx: Suspended state
----8<----

Hence, simplify the function body. The motivation behind dropping the
switch/case construct is being able to implement reading the suspended
state. The latter (based on the above DVSQ[2:0] description) doesn't
have a unique value, but is rather a list of states (which makes
switch/case less suitable for reading/validating it):

100: (Suspended) Powered state
101: (Suspended) Default state
110: (Suspended) Address state
111: (Suspended) Configuration state

Signed-off-by: Eugeniu Rosca <erosca@de.adit-jv.com>
Signed-off-by: Veeraiyan Chidambaram <veeraiyan.chidambaram@in.bosch.com>
Signed-off-by: Felipe Balbi <felipe.balbi@linux.intel.com>
2019-10-22 10:31:04 +03:00
Eugeniu Rosca
8b20d00f0f usb: renesas_usbhs: enable DVSE interrupt
Commit [1] enabled the possibility of checking the DVST (Device State
Transition) bit of INTSTS0 (Interrupt Status Register 0) and calling
the irq_dev_state() handler if the DVST bit is set. But neither
commit [1] nor commit [2] actually enabled the DVSE (Device State
Transition Interrupt Enable) bit in the INTENB0 (Interrupt Enable
Register 0). As a consequence, irq_dev_state() handler is getting
called as a side effect of other (non-DVSE) interrupts being fired,
which definitely can't be relied upon, if DVST notifications are of
any value.

Why this doesn't hurt is because usbhsg_irq_dev_state() currently
doesn't do much except of a dev_dbg(). Once more work is added to
the handler (e.g. detecting device "Suspended" state and notifying
other USB gadget components about it), enabling DVSE becomes a hard
requirement. Do it in a standalone commit for better visibility and
clear explanation.

[1] f1407d5 ("usb: renesas_usbhs: Add Renesas USBHS common code")
[2] 2f98382 ("usb: renesas_usbhs: Add Renesas USBHS Gadget")

Signed-off-by: Eugeniu Rosca <erosca@de.adit-jv.com>
Signed-off-by: Veeraiyan Chidambaram <veeraiyan.chidambaram@in.bosch.com>
Signed-off-by: Felipe Balbi <felipe.balbi@linux.intel.com>
2019-10-22 10:30:59 +03:00
Veeraiyan Chidambaram
e961c47e66 usb: gadget: udc: renesas_usb3: add suspend event support
In R-Car Gen3 USB 3.0 Function, if host is detached an interrupt
will be generated and Suspended state bit is set in interrupt status
register. Interrupt handler will call driver->suspend(composite_suspend)
if suspended state bit is set. composite_suspend will call
ffs_func_suspend which will post FUNCTIONFS_SUSPEND and will be consumed
by user space application via /dev/ep0.

To be able to detect the host detach, USB_INT_1_B2_SPND to cover the
Suspended bit of the B2_SPND_OUT[9] from the USB Status Register
(USB_STA) register and perform appropriate action in the
usb3_irq_epc_int_1 function.

Without this commit, disconnection of the phone from R-Car H3 ES2.0
Salvator-X CN11 port is not recognized and reverse role switch does
not happen. If phone is connected again it does not enumerate.

With this commit, disconnection will be recognized and reverse role
switch will happen by a user space application. If phone is connected
again it will enumerate properly and will become visible in the
output of 'lsusb'.

Reviewed-by: Yoshihiro Shimoda <yoshihiro.shimoda.uh@renesas.com>
Tested-by: Yoshihiro Shimoda <yoshihiro.shimoda.uh@renesas.com>
Signed-off-by: Veeraiyan Chidambaram <veeraiyan.chidambaram@in.bosch.com>
Signed-off-by: Felipe Balbi <felipe.balbi@linux.intel.com>
2019-10-22 10:30:20 +03:00
YueHaibing
6a3893bfbe usb: gadget: s3c-hsudc: use devm_platform_ioremap_resource() to simplify code
Use devm_platform_ioremap_resource() to simplify the code a bit.
This is detected by coccinelle.

Reported-by: Hulk Robot <hulkci@huawei.com>
Signed-off-by: YueHaibing <yuehaibing@huawei.com>
Signed-off-by: Felipe Balbi <felipe.balbi@linux.intel.com>
2019-10-22 10:30:01 +03:00
YueHaibing
e17d87668e usb: gadget: renesas_usb3: use devm_platform_ioremap_resource() to simplify code
Use devm_platform_ioremap_resource() to simplify the code a bit.
This is detected by coccinelle.

Reported-by: Hulk Robot <hulkci@huawei.com>
Signed-off-by: YueHaibing <yuehaibing@huawei.com>
Signed-off-by: Felipe Balbi <felipe.balbi@linux.intel.com>
2019-10-22 10:29:56 +03:00
YueHaibing
195ad9c36d usb: gadget: r8a66597-udc: use devm_platform_ioremap_resource() to simplify code
Use devm_platform_ioremap_resource() to simplify the code a bit.
This is detected by coccinelle.

Reported-by: Hulk Robot <hulkci@huawei.com>
Signed-off-by: YueHaibing <yuehaibing@huawei.com>
Signed-off-by: Felipe Balbi <felipe.balbi@linux.intel.com>
2019-10-22 10:29:52 +03:00
YueHaibing
e7705d269b usb: gadget: pxa27x_udc: use devm_platform_ioremap_resource() to simplify code
Use devm_platform_ioremap_resource() to simplify the code a bit.
This is detected by coccinelle.

Reported-by: Hulk Robot <hulkci@huawei.com>
Signed-off-by: YueHaibing <yuehaibing@huawei.com>
Signed-off-by: Felipe Balbi <felipe.balbi@linux.intel.com>
2019-10-22 10:29:43 +03:00
YueHaibing
623128070e usb: gadget: pxa25x_udc: use devm_platform_ioremap_resource() to simplify code
Use devm_platform_ioremap_resource() to simplify the code a bit.
This is detected by coccinelle.

Reported-by: Hulk Robot <hulkci@huawei.com>
Signed-off-by: YueHaibing <yuehaibing@huawei.com>
Signed-off-by: Felipe Balbi <felipe.balbi@linux.intel.com>
2019-10-22 10:29:37 +03:00
YueHaibing
60b6465be7 usb: gadget: gr_udc: use devm_platform_ioremap_resource() to simplify code
Use devm_platform_ioremap_resource() to simplify the code a bit.
This is detected by coccinelle.

Reported-by: Hulk Robot <hulkci@huawei.com>
Signed-off-by: YueHaibing <yuehaibing@huawei.com>
Signed-off-by: Felipe Balbi <felipe.balbi@linux.intel.com>
2019-10-22 10:29:32 +03:00
YueHaibing
586a5fd60c usb: bdc: use devm_platform_ioremap_resource() to simplify code
Use devm_platform_ioremap_resource() to simplify the code a bit.
This is detected by coccinelle.

Reported-by: Hulk Robot <hulkci@huawei.com>
Signed-off-by: YueHaibing <yuehaibing@huawei.com>
Signed-off-by: Felipe Balbi <felipe.balbi@linux.intel.com>
2019-10-22 10:29:28 +03:00
YueHaibing
4496bf2505 usb: gadget: bcm63xx_udc: use devm_platform_ioremap_resource() to simplify code
Use devm_platform_ioremap_resource() to simplify the code a bit.
This is detected by coccinelle.

Reported-by: Hulk Robot <hulkci@huawei.com>
Signed-off-by: YueHaibing <yuehaibing@huawei.com>
Signed-off-by: Felipe Balbi <felipe.balbi@linux.intel.com>
2019-10-22 10:29:23 +03:00
YueHaibing
2e78dd5147 usb: gadget: at91_udc: use devm_platform_ioremap_resource() to simplify code
Use devm_platform_ioremap_resource() to simplify the code a bit.
This is detected by coccinelle.

Reported-by: Hulk Robot <hulkci@huawei.com>
Signed-off-by: YueHaibing <yuehaibing@huawei.com>
Signed-off-by: Felipe Balbi <felipe.balbi@linux.intel.com>
2019-10-22 10:29:18 +03:00
YueHaibing
836283dd7b usb: renesas_usbhs: use devm_platform_ioremap_resource() to simplify code
Use devm_platform_ioremap_resource() to simplify the code a bit.
This is detected by coccinelle.

Reported-by: Hulk Robot <hulkci@huawei.com>
Signed-off-by: YueHaibing <yuehaibing@huawei.com>
Signed-off-by: Felipe Balbi <felipe.balbi@linux.intel.com>
2019-10-22 10:29:14 +03:00
YueHaibing
53490989ff usb: phy: mxs: use devm_platform_ioremap_resource() to simplify code
Use devm_platform_ioremap_resource() to simplify the code a bit.
This is detected by coccinelle.

Reported-by: Hulk Robot <hulkci@huawei.com>
Signed-off-by: YueHaibing <yuehaibing@huawei.com>
Signed-off-by: Felipe Balbi <felipe.balbi@linux.intel.com>
2019-10-22 10:29:10 +03:00
YueHaibing
b45ca31a6a usb: phy: keystone: use devm_platform_ioremap_resource() to simplify code
Use devm_platform_ioremap_resource() to simplify the code a bit.
This is detected by coccinelle.

Reported-by: Hulk Robot <hulkci@huawei.com>
Signed-off-by: YueHaibing <yuehaibing@huawei.com>
Signed-off-by: Felipe Balbi <felipe.balbi@linux.intel.com>
2019-10-22 10:29:04 +03:00
Michał Mirosław
c6561082b8 usb: gadget: u_serial: use mutex for serialising open()s
Remove home-made waiting mechanism from gs_open() and rely on
portmaster's mutex to do the job.

Note: This releases thread waiting on close() when another thread
open()s simultaneously.

Signed-off-by: Michał Mirosław <mirq-linux@rere.qmqm.pl>
Signed-off-by: Felipe Balbi <felipe.balbi@linux.intel.com>
2019-10-22 10:27:20 +03:00
Michał Mirosław
ef9b457d0d usb: gadget: u_serial: diagnose missed console messages
Insert markers in console stream marking places where data
is missing. This makes the hole in the data stand out clearly
instead of glueing together unrelated messages.

Example output as seen from USB host side:

[    0.064078] pinctrl core: registered pin 16 (UART3_RTS_N PC0) on 70000868.pinmux
[    0.064130] pinctrl
[missed 114987 bytes]
[    4.302299] udevd[134]: starting version 3.2.5
[    4.306845] random: udevd: uninitialized urandom read (16 bytes read)

Signed-off-by: Michał Mirosław <mirq-linux@rere.qmqm.pl>
Reviewed-by: Greg Kroah-Hartman <gregkh@linuxfoundation.org>
Signed-off-by: Felipe Balbi <felipe.balbi@linux.intel.com>
2019-10-22 10:27:17 +03:00
Michał Mirosław
bd25a14edb usb: gadget: legacy/serial: allow dynamic removal
Legacy serial USB gadget is still useful as an early console,
before userspace is up. Later it could be replaced with proper
configfs-configured composite gadget - that use case is enabled
by this patch.

Signed-off-by: Michał Mirosław <mirq-linux@rere.qmqm.pl>
Signed-off-by: Felipe Balbi <felipe.balbi@linux.intel.com>
2019-10-22 10:27:15 +03:00
Michał Mirosław
d7cb8fb7aa usb: gadget: u_serial: allow more console gadget ports
Allow configuring more than one console using USB serial or ACM gadget.

By default, only first (ttyGS0) is a console, but this may be changed
using function's new "console" attribute.

Signed-off-by: Michał Mirosław <mirq-linux@rere.qmqm.pl>
Signed-off-by: Felipe Balbi <felipe.balbi@linux.intel.com>
2019-10-22 10:27:12 +03:00
Michał Mirosław
b417343c6a usb: gadget: u_serial: make OBEX port not a console
Prevent OBEX serial port from ever becoming a console. Console messages
will definitely break the protocol, and since you have to instantiate
the port making it explicitly for OBEX, there is no point in allowing
console to break it by mistake.

Signed-off-by: Michał Mirosław <mirq-linux@rere.qmqm.pl>
Reviewed-by: Greg Kroah-Hartman <gregkh@linuxfoundation.org>
Signed-off-by: Felipe Balbi <felipe.balbi@linux.intel.com>
2019-10-22 10:27:09 +03:00
Michał Mirosław
fe1ea63ad8 usb: gadget: u_serial: reimplement console support
Rewrite console support to fix a few shortcomings of the old code
preventing its use with multiple ports. This removes some duplicated
code and replaces a custom kthread with simpler workqueue item.

Only port ttyGS0 gets to be a console for now.

Signed-off-by: Michał Mirosław <mirq-linux@rere.qmqm.pl>
Reviewed-by: Greg Kroah-Hartman <gregkh@linuxfoundation.org>
Tested-by: Ladislav Michl <ladis@linux-mips.org>
Signed-off-by: Felipe Balbi <felipe.balbi@linux.intel.com>
2019-10-22 10:27:06 +03:00
Michał Mirosław
daf82bd24e usb: gadget: u_serial: add missing port entry locking
gserial_alloc_line() misses locking (for a release barrier) while
resetting port entry on TTY allocation failure. Fix this.

Cc: stable@vger.kernel.org
Signed-off-by: Michał Mirosław <mirq-linux@rere.qmqm.pl>
Reviewed-by: Greg Kroah-Hartman <gregkh@linuxfoundation.org>
Tested-by: Ladislav Michl <ladis@linux-mips.org>
Signed-off-by: Felipe Balbi <felipe.balbi@linux.intel.com>
2019-10-22 10:27:04 +03:00
Thinh Nguyen
9ba3aca8fe usb: dwc3: Disable phy suspend after power-on reset
For DRD controllers, the programming guide recommended that
GUSB3PIPECTL.SUSPENDABLE and GUSB2PHYCFG.SUSPHY to be cleared after
power-on reset and only set after the controller initialization is
completed. This can be done after device soft-reset in dwc3_core_init().
This patch makes sure to clear GUSB3PIPECTL.SUSPENDABLE and
GUSB2PHYCFG.SUSPHY before core initialization and only set them after
the device soft-reset is completed.

Reference: DWC_usb3 3.30a and DWC_usb31 1.90a programming guide section
1.2.49 and 1.2.45

Signed-off-by: Thinh Nguyen <thinhn@synopsys.com>
Signed-off-by: Felipe Balbi <felipe.balbi@linux.intel.com>
2019-10-22 10:26:45 +03:00
Johan Hovold
aafb00a977 USB: yurex: fix NULL-derefs on disconnect
The driver was using its struct usb_interface pointer as an inverted
disconnected flag, but was setting it to NULL without making sure all
code paths that used it were done with it.

Before commit ef61eb43ad ("USB: yurex: Fix protection fault after
device removal") this included the interrupt-in completion handler, but
there are further accesses in dev_err and dev_dbg statements in
yurex_write() and the driver-data destructor (sic!).

Fix this by unconditionally stopping also the control URB at disconnect
and by using a dedicated disconnected flag.

Note that we need to take a reference to the struct usb_interface to
avoid a use-after-free in the destructor whenever the device was
disconnected while the character device was still open.

Fixes: aadd6472d9 ("USB: yurex.c: remove dbg() usage")
Fixes: 45714104b9 ("USB: yurex.c: remove err() usage")
Cc: stable <stable@vger.kernel.org>     # 3.5: ef61eb43ad
Signed-off-by: Johan Hovold <johan@kernel.org>
Link: https://lore.kernel.org/r/20191009153848.8664-6-johan@kernel.org
Signed-off-by: Greg Kroah-Hartman <gregkh@linuxfoundation.org>
2019-10-10 14:24:06 +02:00
Johan Hovold
ebb2fe57a5 USB: iowarrior: use pr_err()
Replace the one remaining printk with pr_err().

Signed-off-by: Johan Hovold <johan@kernel.org>
Link: https://lore.kernel.org/r/20191009104846.5925-7-johan@kernel.org
Signed-off-by: Greg Kroah-Hartman <gregkh@linuxfoundation.org>
2019-10-10 12:45:07 +02:00
Johan Hovold
8d33e828f7 USB: iowarrior: drop redundant iowarrior mutex
Drop the redundant iowarrior mutex introduced by commit 925ce689bb
("USB: autoconvert trivial BKL users to private mutex") which replaced
an earlier BKL use.

The lock serialised calls to open() against other open() and ioctl(),
but neither is needed.

Signed-off-by: Johan Hovold <johan@kernel.org>
Link: https://lore.kernel.org/r/20191009104846.5925-6-johan@kernel.org
Signed-off-by: Greg Kroah-Hartman <gregkh@linuxfoundation.org>
2019-10-10 12:45:07 +02:00
Johan Hovold
7c5b971d62 USB: iowarrior: drop redundant disconnect mutex
Drop the redundant disconnect mutex which was introduced after the
open-disconnect race had been addressed generally in USB core by commit
d4ead16f50 ("USB: prevent char device open/deregister race").

Specifically, the rw-semaphore in core guarantees that all calls to
open() will have completed and that no new calls to open() will occur
after usb_deregister_dev() returns. Hence there is no need use the
driver data as an inverted disconnected flag.

Signed-off-by: Johan Hovold <johan@kernel.org>
Link: https://lore.kernel.org/r/20191009104846.5925-5-johan@kernel.org
Signed-off-by: Greg Kroah-Hartman <gregkh@linuxfoundation.org>
2019-10-10 12:45:06 +02:00
Johan Hovold
b5f8d46867 USB: iowarrior: fix use-after-free after driver unbind
Make sure to stop also the asynchronous write URBs on disconnect() to
avoid use-after-free in the completion handler after driver unbind.

Fixes: 946b960d13 ("USB: add driver for iowarrior devices.")
Cc: stable <stable@vger.kernel.org>	# 2.6.21: 51a2f077c4 ("USB: introduce usb_anchor")
Signed-off-by: Johan Hovold <johan@kernel.org>
Link: https://lore.kernel.org/r/20191009104846.5925-4-johan@kernel.org
Signed-off-by: Greg Kroah-Hartman <gregkh@linuxfoundation.org>
2019-10-10 12:45:06 +02:00
Johan Hovold
80cd5479b5 USB: iowarrior: fix use-after-free on release
The driver was accessing its struct usb_interface from its release()
callback without holding a reference. This would lead to a
use-after-free whenever debugging was enabled and the device was
disconnected while its character device was open.

Fixes: 549e83500b ("USB: iowarrior: Convert local dbg macro to dev_dbg")
Cc: stable <stable@vger.kernel.org>     # 3.16
Signed-off-by: Johan Hovold <johan@kernel.org>
Link: https://lore.kernel.org/r/20191009104846.5925-3-johan@kernel.org
Signed-off-by: Greg Kroah-Hartman <gregkh@linuxfoundation.org>
2019-10-10 12:45:06 +02:00
Johan Hovold
edc4746f25 USB: iowarrior: fix use-after-free on disconnect
A recent fix addressing a deadlock on disconnect introduced a new bug
by moving the present flag out of the critical section protected by the
driver-data mutex. This could lead to a racing release() freeing the
driver data before disconnect() is done with it.

Due to insufficient locking a related use-after-free could be triggered
also before the above mentioned commit. Specifically, the driver needs
to hold the driver-data mutex also while checking the opened flag at
disconnect().

Fixes: c468a8aa79 ("usb: iowarrior: fix deadlock on disconnect")
Fixes: 946b960d13 ("USB: add driver for iowarrior devices.")
Cc: stable <stable@vger.kernel.org>	# 2.6.21
Reported-by: syzbot+0761012cebf7bdb38137@syzkaller.appspotmail.com
Signed-off-by: Johan Hovold <johan@kernel.org>
Link: https://lore.kernel.org/r/20191009104846.5925-2-johan@kernel.org
Signed-off-by: Greg Kroah-Hartman <gregkh@linuxfoundation.org>
2019-10-10 12:45:06 +02:00
Johan Hovold
93ddb1f56a USB: chaoskey: fix use-after-free on release
The driver was accessing its struct usb_interface in its release()
callback without holding a reference. This would lead to a
use-after-free whenever the device was disconnected while the character
device was still open.

Fixes: 66e3e59189 ("usb: Add driver for Altus Metrum ChaosKey device (v2)")
Cc: stable <stable@vger.kernel.org>     # 4.1
Signed-off-by: Johan Hovold <johan@kernel.org>
Link: https://lore.kernel.org/r/20191009153848.8664-3-johan@kernel.org
Signed-off-by: Greg Kroah-Hartman <gregkh@linuxfoundation.org>
2019-10-10 12:43:19 +02:00