linux_dsm_epyc7002/drivers/usb
Yoshihiro Shimoda 8355b2b308 usb: renesas_usbhs: fix the behavior of some usbhs_pkt_handle
Some gadget drivers will call usb_ep_queue() more than once before
the first queue doesn't finish. However, this driver didn't handle
it correctly. So, this patch fixes the behavior of some
usbhs_pkt_handle using the "running" flag. Otherwise, the oops below
happens if we use g_ncm driver and when the "iperf -u -c host -b 200M"
is running.

Unable to handle kernel NULL pointer dereference at virtual address 00000000
pgd = c0004000
[00000000] *pgd=00000000
Internal error: Oops: 80000007 [#1] SMP ARM
Modules linked in: usb_f_ncm g_ncm libcomposite u_ether
CPU: 0 PID: 0 Comm: swapper/0 Tainted: G        W      3.17.0-rc1-00008-g8b2be8a-dirty #20
task: c051c7e0 ti: c0512000 task.ti: c0512000
PC is at 0x0
LR is at usbhsf_pkt_handler+0xa8/0x114
pc : [<00000000>]    lr : [<c0278fb4>]    psr: 60000193
sp : c0513ce8  ip : c0513c58  fp : c0513d24
r10: 00000001  r9 : 00000193  r8 : eebec4a0
r7 : eebec410  r6 : eebe0c6c  r5 : 00000000  r4 : ee4a2774
r3 : 00000000  r2 : ee251e00  r1 : c0513cf4  r0 : ee4a2774

Signed-off-by: Yoshihiro Shimoda <yoshihiro.shimoda.uh@renesas.com>
Signed-off-by: Felipe Balbi <balbi@ti.com>
2014-09-03 09:15:57 -05:00
..
atm usb: delete non-required instances of include <linux/init.h> 2014-01-08 15:01:39 -08:00
c67x00 USB: c67x00: correct spelling mistakes in comments 2014-01-08 15:05:14 -08:00
chipidea USB patches for 3.17-rc1 2014-08-04 20:11:28 -07:00
class usb: class: usbtmc.c: Cleaning up uninitialized variables 2014-07-09 15:59:10 -07:00
common usb: common: rename phy-fsm-usb.c to usb-otg-fsm.c 2014-05-27 15:29:44 -07:00
core USB: fix build error with CONFIG_PM_RUNTIME disabled 2014-08-27 16:55:29 -07:00
dwc2 usb: dwc2: gadget: Set the default EP max packet value as 8 bytes 2014-08-25 13:12:27 -07:00
dwc3 usb: dwc3: omap: signedness bug in dwc3_omap_set_utmi_mode() 2014-08-19 09:24:48 -05:00
early USB: ehci-dbgp: drop dead code. 2013-09-26 16:25:21 -07:00
gadget usb: gadget: fusb300_udc.h: Fix typo in include guard 2014-09-03 09:15:57 -05:00
host Revert "usb: ehci/ohci-exynos: Fix PHY getting sequence" 2014-08-27 15:23:53 -07:00
image USB: image: correct spelling mistake in comment 2014-01-08 15:08:14 -08:00
misc USB: sisusb: add device id for Magic Control USB video 2014-08-26 12:07:46 -07:00
mon USB: regroup all depends on USB within an if USB block 2013-04-09 16:49:07 -07:00
musb usb: musb: cppi41: fix not transmitting zero length packet issue 2014-09-03 09:15:56 -05:00
phy usb: phy: msm: Fix return value check in msm_otg_probe() 2014-08-19 09:27:24 -05:00
renesas_usbhs usb: renesas_usbhs: fix the behavior of some usbhs_pkt_handle 2014-09-03 09:15:57 -05:00
serial USB: serial: fix potential heap buffer overflow 2014-08-27 13:23:52 -07:00
storage USB: storage: add quirk for Newer Technology uSCSI SCSI-USB converter 2014-08-25 10:46:11 -07:00
usbip usbip: remove struct usb_device_id table 2014-08-25 10:40:58 -07:00
wusbcore usb: wusbcore: fix below build warning 2014-08-19 11:28:53 -05:00
Kconfig usbip: move usbip kernel code out of staging 2014-08-25 10:40:06 -07:00
Makefile usbip: move usbip kernel code out of staging 2014-08-25 10:40:06 -07:00
README
usb-skeleton.c usb: delete non-required instances of include <linux/init.h> 2014-01-08 15:01:39 -08:00

To understand all the Linux-USB framework, you'll use these resources:

    * This source code.  This is necessarily an evolving work, and
      includes kerneldoc that should help you get a current overview.
      ("make pdfdocs", and then look at "usb.pdf" for host side and
      "gadget.pdf" for peripheral side.)  Also, Documentation/usb has
      more information.

    * The USB 2.0 specification (from www.usb.org), with supplements
      such as those for USB OTG and the various device classes.
      The USB specification has a good overview chapter, and USB
      peripherals conform to the widely known "Chapter 9".

    * Chip specifications for USB controllers.  Examples include
      host controllers (on PCs, servers, and more); peripheral
      controllers (in devices with Linux firmware, like printers or
      cell phones); and hard-wired peripherals like Ethernet adapters.

    * Specifications for other protocols implemented by USB peripheral
      functions.  Some are vendor-specific; others are vendor-neutral
      but just standardized outside of the www.usb.org team.

Here is a list of what each subdirectory here is, and what is contained in
them.

core/		- This is for the core USB host code, including the
		  usbfs files and the hub class driver ("khubd").

host/		- This is for USB host controller drivers.  This
		  includes UHCI, OHCI, EHCI, and others that might
		  be used with more specialized "embedded" systems.

gadget/		- This is for USB peripheral controller drivers and
		  the various gadget drivers which talk to them.


Individual USB driver directories.  A new driver should be added to the
first subdirectory in the list below that it fits into.

image/		- This is for still image drivers, like scanners or
		  digital cameras.
../input/	- This is for any driver that uses the input subsystem,
		  like keyboard, mice, touchscreens, tablets, etc.
../media/	- This is for multimedia drivers, like video cameras,
		  radios, and any other drivers that talk to the v4l
		  subsystem.
../net/		- This is for network drivers.
serial/		- This is for USB to serial drivers.
storage/	- This is for USB mass-storage drivers.
class/		- This is for all USB device drivers that do not fit
		  into any of the above categories, and work for a range
		  of USB Class specified devices. 
misc/		- This is for all USB device drivers that do not fit
		  into any of the above categories.