Calling module_put(THIS_MODULE) is *never* safe when we cannot go sure that we
own at least two references. This is because the call may unload our module
before it returns and then the "return" will jump into invalid memory.
Gladly, module.h provides a wrapper for kthread-users: module_put_and_exit().
This puts our module and then exits the kthread without returning to the module.
This patch fixes the hidp kthread to use this wrapper instead of manually
freeing its own reference. See nfsd or lockd for other kthreads using this.
Calling __module_get() inside the kthread is safe as the hidp module will always
wait until the kthread sets "waiting_for_startup" to 0.
Signed-off-by: David Herrmann <dh.herrmann@googlemail.com>
Signed-off-by: Gustavo F. Padovan <padovan@profusion.mobi>
When all items in the list have the same type there is no much of a point
to use list_for_each except if you want to use the list pointer itself.
Signed-off-by: Luiz Augusto von Dentz <luiz.von.dentz@intel.com>
Signed-off-by: Gustavo F. Padovan <padovan@profusion.mobi>
hidp_get_connection() makes more sense because we hold a reference to the
connection inside this function.
Signed-off-by: Gustavo F. Padovan <padovan@profusion.mobi>
Claim device lock to safely enumerate hci connection list and bump
hci connection proxy device ref count simultaneously.
This patch incorporates David Herrmann's fix to prevent adding an
HID device when the hci connection no longer exists.
Signed-off-by: David Herrmann <dh.herrmann@googlemail.com>
Signed-off-by: Peter Hurley <peter@hurleysoftware.com>
Signed-off-by: Gustavo F. Padovan <padovan@profusion.mobi>
Current hidp driver purges the in/out queue on HID shutdown, but does
not prevent further I/O. If a driver uses hidp_output_raw_report or
hidp_get_raw_report during shutdown, the driver hangs for 5 or 10
seconds per call until it gets a timeout.
That is, if the output queue of an HID driver has 10 messages pending,
it will take 50s until hid_destroy_device() will return. The
hidp_session_sem semaphore is held during shutdown so no other HID
device may be added/removed during this time.
This patch makes hidp_output_raw_report and hidp_get_raw_report fail if
session->terminate is true. Also hidp_session will wakeup all current
calls to these functions to cancel the current operations.
We already purge the current I/O queues on hidp_stop(), so this data loss
does not change the behaviour of the HID drivers.
Signed-off-by: David Herrmann <dh.herrmann@googlemail.com>
Signed-off-by: Gustavo F. Padovan <padovan@profusion.mobi>
Fragmented skbs are only encountered when receiving ERTM or streaming
mode L2CAP data. BNEP, CMTP, HIDP, and RFCOMM generally use basic
mode, but they need to handle fragments without crashing.
Signed-off-by: Mat Martineau <mathewm@codeaurora.org>
Signed-off-by: Gustavo F. Padovan <padovan@profusion.mobi>
During setup the host initializes all HID reports. Some devices do not
support this. If this quirk is set, we skip the initialization.
See also usbhid_init_reports() for this quirk.
Signed-off-by: David Herrmann <dh.herrmann@googlemail.com>
Signed-off-by: Gustavo F. Padovan <padovan@profusion.mobi>
When an hidp connection is added for a boot protocol input
device, don't release a device reference that was never
acquired. The device reference is acquired when the session
is linked to the session list (which hasn't happened yet when
hidp_setup_input is called).
Signed-off-by: Peter Hurley <peter@hurleysoftware.com>
Signed-off-by: Gustavo F. Padovan <padovan@profusion.mobi>
When an hidp connection is added for a boot protocol input
device, only free the allocated device if device registration fails.
Subsequent failures should only unregister the device (the input
device api documents that unregister will also free the allocated
device).
Signed-off-by: Peter Hurley <peter@hurleysoftware.com>
Signed-off-by: Gustavo F. Padovan <padovan@profusion.mobi>
Free the cached HID report descriptor on thread terminate.
Signed-off-by: Peter Hurley <peter@hurleysoftware.com>
Signed-off-by: Gustavo F. Padovan <padovan@profusion.mobi>
Once the session thread is running, cleanup must be
handled by the session thread only.
Signed-off-by: Peter Hurley <peter@hurleysoftware.com>
Signed-off-by: Gustavo F. Padovan <padovan@profusion.mobi>
Partial revert of commit aabf6f89. When the hidp session thread
was converted from kernel_thread to kthread, the atomic/wakeups
were replaced with kthread_stop. kthread_stop has blocking semantics
which are inappropriate for the hidp session kthread. In addition,
the kthread signals itself to terminate in hidp_process_hid_control()
- it cannot do this with kthread_stop().
Lastly, a wakeup can be lost if the wakeup happens between checking
for the loop exit condition and setting the current state to
TASK_INTERRUPTIBLE. (Without appropriate synchronization mechanisms,
the task state should not be changed between the condition test and
the yield - via schedule() - as this creates a race between the
wakeup and resetting the state back to interruptible.)
Signed-off-by: Peter Hurley <peter@hurleysoftware.com>
Signed-off-by: Gustavo F. Padovan <padovan@profusion.mobi>
* 'for-linus' of git://git.kernel.org/pub/scm/linux/kernel/git/jikos/hid: (36 commits)
HID: hid-multitouch: cosmetic changes, sort classes and devices
HID: hid-multitouch: class MT_CLS_STANTUM is redundant with MT_CLS_CONFIDENCE
HID: hid-multitouch: add support for Unitec panels
HID: hid-multitouch: add support for Touch International panels
HID: hid-multitouch: add support for GoodTouch panels
HID: hid-multitouch: add support for CVTouch panels
HID: hid-multitouch: add support for ActionStar panels
HID: hiddev: fix race between hiddev_disconnect and hiddev_release
HID: magicmouse: ignore 'ivalid report id' while switching modes
HID: fix a crash in hid_report_raw_event() function.
HID: hid-multitouch: add support for Elo TouchSystems 2515 IntelliTouch Plus
HID: assorted usage updates from hut 1.12
HID: roccat: fix actual/startup profile sysfs attribute in koneplus
HID: hid-multitouch: Add support for Lumio panels
HID: 'name' and 'phys' in 'struct hid_device' can never be NULL
HID: hid-multitouch: add support for Ilitek dual-touch panel
HID: picolcd: Avoid compile warning/error triggered by copy_from_user()
HID: add support for Logitech G27 wheel
HID: hiddev: fix error path in hiddev_read when interrupted
HID: add support for Sony Navigation Controller
...
In this commit, omtu, imtu, flush_to, mode and sport. It also remove the
pi var from l2cap_sock_sendmsg().
Signed-off-by: Gustavo F. Padovan <padovan@profusion.mobi>
kernel_thread() is a low-level implementation detail and
EXPORT_SYMBOL(kernel_thread) is scheduled for removal.
Use the <linux/kthread.h> API instead.
Signed-off-by: Szymon Janc <szymon.janc@tieto.com>
Signed-off-by: Gustavo F. Padovan <padovan@profusion.mobi>
* 'for-linus' of git://git.kernel.org/pub/scm/linux/kernel/git/jikos/hid: (48 commits)
HID: add support for Logitech Driving Force Pro wheel
HID: hid-ortek: remove spurious reference
HID: add support for Ortek PKB-1700
HID: roccat-koneplus: vorrect mode of sysfs attr 'sensor'
HID: hid-ntrig: init settle and mode check
HID: merge hid-egalax into hid-multitouch
HID: hid-multitouch: Send events per slot if CONTACTCOUNT is missing
HID: ntrig remove if and drop an indent
HID: ACRUX - activate the device immediately after binding
HID: ntrig: apply NO_INIT_REPORTS quirk
HID: hid-magicmouse: Correct touch orientation direction
HID: ntrig don't dereference unclaimed hidinput
HID: Do not create input devices for feature reports
HID: bt hidp: send Output reports using SET_REPORT on the Control channel
HID: hid-sony.c: Fix sending Output reports to the Sixaxis
HID: add support for Keytouch IEC 60945
HID: Add HID Report Descriptor to sysfs
HID: add IRTOUCH infrared USB to hid_have_special_driver
HID: kernel oops in out_cleanup in function hidinput_connect
HID: Add teletext/color keys - gyration remote - EU version (GYAR3101CKDE)
...
The current implementation of hidp_output_raw_report() relies only on
the Control channel even for Output reports, and the BT HID
specification [1] does not mention using the DATA message for Output
reports on the Control channel (see section 7.9.1 and also Figure 11:
SET_ Flow Chart), so let us just use SET_REPORT.
This also fixes sending Output reports to some devices (like Sony
Sixaxis) which are not able to handle DATA messages on the Control
channel.
Ideally hidp_output_raw_report() could be improved to use this scheme:
Feature Report -- SET_REPORT on the Control channel
Output Report -- DATA on the Interrupt channel
for more efficiency, but as said above, right now only the Control
channel is used.
[1] http://www.bluetooth.com/Specification%20Documents/HID_SPEC_V10.pdf
Signed-off-by: Antonio Ospite <ospite@studenti.unina.it>
Acked-by: Gustavo F. Padovan <padovan@profusion.mobi>
Signed-off-by: Jiri Kosina <jkosina@suse.cz>
l2cap_load() was added to trigger l2cap.ko module loading from the RFCOMM
and BNEP modules. Now that L2CAP module is gone, we don't need it anymore.
Signed-off-by: Gustavo F. Padovan <padovan@profusion.mobi>
This patch adds support or getting and setting feature reports for bluetooth
HID devices from HIDRAW.
Signed-off-by: Alan Ott <alan@signal11.us>
Acked-by: Gustavo F. Padovan <padovan@profusion.mobi>
Signed-off-by: Jiri Kosina <jkosina@suse.cz>
Wait for an ACK from the device before returning from
hidp_output_raw_report(). This way, failures can be returned to the user
application. Also, it prevents ACK/NAK packets from an output packet from
being confused with ACK/NAK packets from an input request packet.
Signed-off-by: Alan Ott <alan@signal11.us>
Acked-by: Gustavo F. Padovan <padovan@profusion.mobi>
Signed-off-by: Jiri Kosina <jkosina@suse.cz>
Move the call to hid_add_device() (which calls a device's probe() function)
to after the kernel_thread() call which starts the hidp_session() thread.
This ensures the Bluetooth receive socket is fully running by the time a
device's probe() function is called. This way, a device can communicate
(send and receive) with the Bluetooth device from its probe() function.
Signed-off-by: Alan Ott <alan@signal11.us>
Acked-by: Gustavo F. Padovan <padovan@profusion.mobi>
Signed-off-by: Jiri Kosina <jkosina@suse.cz>
Fix checkpatch warnings concerning assignments in if conditions.
Signed-off-by: Andrei Emeltchenko <andrei.emeltchenko@nokia.com>
Signed-off-by: Gustavo F. Padovan <padovan@profusion.mobi>
Structure hidp_conninfo is copied to userland with version, product,
vendor and name fields unitialized if both session->input and session->hid
are NULL. It leads to leaking of contents of kernel stack memory.
Signed-off-by: Vasiliy Kulikov <segooon@gmail.com>
Acked-by: Marcel Holtmann <marcel@holtmann.org>
Signed-off-by: Gustavo F. Padovan <padovan@profusion.mobi>
The Bluetooth core uses the the BD_ADDR in the opposite order from the
human readable order. So we are changing batostr() to print in the
correct order and then removing some baswap(), as they are not needed
anymore.
Acked-by: Marcel Holtmann <marcel@holtmann.org>
Signed-off-by: Gustavo F. Padovan <padovan@profusion.mobi>
Define a new function to return the waitqueue of a "struct sock".
static inline wait_queue_head_t *sk_sleep(struct sock *sk)
{
return sk->sk_sleep;
}
Change all read occurrences of sk_sleep by a call to this function.
Needed for a future RCU conversion. sk_sleep wont be a field directly
available.
Signed-off-by: Eric Dumazet <eric.dumazet@gmail.com>
Signed-off-by: David S. Miller <davem@davemloft.net>
percpu.h is included by sched.h and module.h and thus ends up being
included when building most .c files. percpu.h includes slab.h which
in turn includes gfp.h making everything defined by the two files
universally available and complicating inclusion dependencies.
percpu.h -> slab.h dependency is about to be removed. Prepare for
this change by updating users of gfp and slab facilities include those
headers directly instead of assuming availability. As this conversion
needs to touch large number of source files, the following script is
used as the basis of conversion.
http://userweb.kernel.org/~tj/misc/slabh-sweep.py
The script does the followings.
* Scan files for gfp and slab usages and update includes such that
only the necessary includes are there. ie. if only gfp is used,
gfp.h, if slab is used, slab.h.
* When the script inserts a new include, it looks at the include
blocks and try to put the new include such that its order conforms
to its surrounding. It's put in the include block which contains
core kernel includes, in the same order that the rest are ordered -
alphabetical, Christmas tree, rev-Xmas-tree or at the end if there
doesn't seem to be any matching order.
* If the script can't find a place to put a new include (mostly
because the file doesn't have fitting include block), it prints out
an error message indicating which .h file needs to be added to the
file.
The conversion was done in the following steps.
1. The initial automatic conversion of all .c files updated slightly
over 4000 files, deleting around 700 includes and adding ~480 gfp.h
and ~3000 slab.h inclusions. The script emitted errors for ~400
files.
2. Each error was manually checked. Some didn't need the inclusion,
some needed manual addition while adding it to implementation .h or
embedding .c file was more appropriate for others. This step added
inclusions to around 150 files.
3. The script was run again and the output was compared to the edits
from #2 to make sure no file was left behind.
4. Several build tests were done and a couple of problems were fixed.
e.g. lib/decompress_*.c used malloc/free() wrappers around slab
APIs requiring slab.h to be added manually.
5. The script was run on all .h files but without automatically
editing them as sprinkling gfp.h and slab.h inclusions around .h
files could easily lead to inclusion dependency hell. Most gfp.h
inclusion directives were ignored as stuff from gfp.h was usually
wildly available and often used in preprocessor macros. Each
slab.h inclusion directive was examined and added manually as
necessary.
6. percpu.h was updated not to include slab.h.
7. Build test were done on the following configurations and failures
were fixed. CONFIG_GCOV_KERNEL was turned off for all tests (as my
distributed build env didn't work with gcov compiles) and a few
more options had to be turned off depending on archs to make things
build (like ipr on powerpc/64 which failed due to missing writeq).
* x86 and x86_64 UP and SMP allmodconfig and a custom test config.
* powerpc and powerpc64 SMP allmodconfig
* sparc and sparc64 SMP allmodconfig
* ia64 SMP allmodconfig
* s390 SMP allmodconfig
* alpha SMP allmodconfig
* um on x86_64 SMP allmodconfig
8. percpu.h modifications were reverted so that it could be applied as
a separate patch and serve as bisection point.
Given the fact that I had only a couple of failures from tests on step
6, I'm fairly confident about the coverage of this conversion patch.
If there is a breakage, it's likely to be something in one of the arch
headers which should be easily discoverable easily on most builds of
the specific arch.
Signed-off-by: Tejun Heo <tj@kernel.org>
Guess-its-ok-by: Christoph Lameter <cl@linux-foundation.org>
Cc: Ingo Molnar <mingo@redhat.com>
Cc: Lee Schermerhorn <Lee.Schermerhorn@hp.com>
* 'for-linus' of git://git.kernel.org/pub/scm/linux/kernel/git/jikos/hid: (41 commits)
HID: usbhid: initialize interface pointers early enough
HID: extend mask for BUTTON usage page
HID: hid-ntrig: Single touch mode tap
HID: hid-ntrig: multitouch cleanup and fix
HID: n-trig: remove unnecessary tool switching
HID: hid-ntrig add multi input quirk and clean up
HID: usbhid: introduce timeout for stuck ctrl/out URBs
HID: magicmouse: coding style and probe failure fixes
HID: remove MODULE_VERSION from new drivers
HID: fix up Kconfig entry for MagicMouse
HID: add a device driver for the Apple Magic Mouse.
HID: Export hid_register_report
HID: Support for MosArt multitouch panel
HID: add pressure support for the Stantum multitouch panel
HID: fixed bug in single-touch emulation on the stantum panel
HID: fix typo in error message
HID: add mapping for "AL Network Chat" usage
HID: use multi input quirk for TouchPack touchscreen
HID: make full-fledged hid-bus drivers properly selectable
HID: make Wacom modesetting failures non-fatal
...
The report descriptor is read by user space (via the Service
Discovery Protocol), so it is only available during the ioctl
to connect. However, the HID probe function that needs the
descriptor might not be called until a specific module is
loaded. Keep a copy of the descriptor so it is available for
later use.
Signed-off-by: Michael Poole <mdpoole@troilus.org>
Signed-off-by: Marcel Holtmann <marcel@holtmann.org>
In commit 2da31939a4 ("Bluetooth: Implement raw output support for HIDP
layer"), support for Bluetooth hid_output_raw_report was added, but it
pushes the data to the intr socket instead of the ctrl one. This has been
fixed by 6bf8268f9a ("Bluetooth: Use the control channel for raw HID reports")
Still, it is necessary to distinguish whether the report in question should be
either FEATURE or OUTPUT. For this, we have to extend the generic HID API,
so that hid_output_raw_report() callback provides means to specify this
value so that it can be passed down to lower level hardware drivers (currently
Bluetooth and USB).
Based on original patch by Bastien Nocera <hadess@hadess.net>
Acked-by: Marcel Holtmann <marcel@holtmann.org>
Signed-off-by: Jiri Kosina <jkosina@suse.cz>
In commit 2da31939a4, support
for Bluetooth hid_output_raw_report was added, but it pushes
the data to the interrupt channel instead of the contol one.
This patch makes hid_output_raw_report use the control channel
instead. Using the interrupt channel was a mistake.
Signed-off-by: Bastien Nocera <hadess@hadess.net>
Signed-off-by: Marcel Holtmann <marcel@holtmann.org>
Implement raw output callback which is used by hidraw to send raw data to
the underlying device.
Without this patch, the userspace hidraw-based applications can't send
output reports to HID Bluetooth devices.
Reported-and-tested-by: Brian Gunn <bgunn@solekai.com>
Signed-off-by: Jiri Kosina <jkosina@suse.cz>
Signed-off-by: Marcel Holtmann <marcel@holtmann.org>
The generic __sock_create function has a kern argument which allows the
security system to make decisions based on if a socket is being created by
the kernel or by userspace. This patch passes that flag to the
net_proto_family specific create function, so it can do the same thing.
Signed-off-by: Eric Paris <eparis@redhat.com>
Acked-by: Arnaldo Carvalho de Melo <acme@redhat.com>
Signed-off-by: David S. Miller <davem@davemloft.net>
All usages of structure net_proto_ops should be declared const.
Signed-off-by: Stephen Hemminger <shemminger@vyatta.com>
Signed-off-by: David S. Miller <davem@davemloft.net>
HID core registers input, hidraw and hiddev devices, but leaves
unregistering it up to the individual driver, which is not really nice.
Let's move all the logic to the core.
Reported-by: Marcel Holtmann <marcel@holtmann.org>
Reported-by: Brian Rogers <brian@xyzw.org>
Acked-by: Marcel Holtmann <marcel@holtmann.org>
Signed-off-by: Jiri Kosina <jkosina@suse.cz>
The core exports the hci_conn_hold_device() and hci_conn_put_device()
functions for device reference of connections. Use this to ensure that
the uevents from the parent are send after the child ones.
Based on a report by Brian Rogers <brian@xyzw.org>
Signed-off-by: Marcel Holtmann <marcel@holtmann.org>
Currently the HID subsystem will create HIDRAW devices for the transport
driver, but it will not disconnect them. Until the HID subsytem gets
fixed, ensure that HIDRAW and HIDDEV devices are disconnected when the
Bluetooth HID device gets removed.
Based on a patch from Brian Rogers <brian@xyzw.org>
Signed-off-by: Marcel Holtmann <marcel@holtmann.org>
There is a test case in PTS tool; PTS will send the VIRTUAL_CABLE_UNPLUG
command to IUT. Then IUT should disconnect the channel and kill the HID
session when it receives the command. The VIRTUAL_CABLE_UNPLUG command
is parsed by HID transport, but it is not scheduled to do so. Add a
call to hidp_schedule() to kill the session.
Signed-off-by: Jothikumar Mothilal <jothikumar.mothilal@atheros.com>
Signed-off-by: Marcel Holtmann <marcel@holtmann.org>
