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c849a6143b
linux/drivers/hid
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Andrew de los Reyes c849a6143b HID: Separate struct hid_device's driver_lock into two locks. 
This patch separates struct hid_device's driver_lock into two. The
goal is to allow hid device drivers to receive input during their
probe() or remove() function calls. This is necessary because some
drivers need to communicate with the device to determine parameters
needed during probe (e.g., size of a multi-touch surface), and if
possible, may perfer to communicate with a device on host-initiated
disconnect (e.g., to put it into a low-power state).

Historically, three functions used driver_lock:

- hid_device_probe: blocks to acquire lock
- hid_device_remove: blocks to acquire lock
- hid_input_report: if locked returns -EBUSY, else acquires lock

This patch adds another lock (driver_input_lock) which is used to
block input from occurring. The lock behavior is now:

- hid_device_probe: blocks to acq. driver_lock, then driver_input_lock
- hid_device_remove: blocks to acq. driver_lock, then driver_input_lock
- hid_input_report: if driver_input_lock locked returns -EBUSY, else
  acquires driver_input_lock

This patch also adds two helper functions to be called during probe()
or remove(): hid_device_io_start() and hid_device_io_stop(). These
functions lock and unlock, respectively, driver_input_lock; they also
make a note of whether they did so that hid-core knows if a driver has
changed the lock state.

This patch results in no behavior change for existing devices and
drivers. However, during a probe() or remove() function call in a
driver, that driver may now selectively call hid_device_io_start() to
let input events come through, then optionally call
hid_device_io_stop() to stop them.

Signed-off-by: Andrew de los Reyes <adlr@chromium.org>
Signed-off-by: Jiri Kosina <jkosina@suse.cz>
2013-03-01 14:13:07 +01:00
..
i2c-hid Merge branches 'for-3.8/upstream-fixes', 'for-3.9/hid-sensor', 'for-3.9/hidraw' and 'for-3.9/i2c-hid' into for-linus 2013-02-21 10:42:39 +01:00
usbhid HID: usbhid: quirk for Formosa IR receiver 2013-01-03 11:13:42 +01:00
hid-a4tech.c HID: Use module_hid_driver macro 2013-01-03 10:27:31 +01:00
hid-apple.c HID: Use module_hid_driver macro 2013-01-03 10:27:31 +01:00
hid-aureal.c HID: Use module_hid_driver macro 2013-01-03 10:27:31 +01:00
hid-axff.c HID: Use module_hid_driver macro 2013-01-03 10:27:31 +01:00
hid-belkin.c HID: Use module_hid_driver macro 2013-01-03 10:27:31 +01:00
hid-cherry.c HID: Use module_hid_driver macro 2013-01-03 10:27:31 +01:00
hid-chicony.c HID: Use module_hid_driver macro 2013-01-03 10:27:31 +01:00
hid-core.c HID: Separate struct hid_device's driver_lock into two locks. 2013-03-01 14:13:07 +01:00
hid-cypress.c HID: Use module_hid_driver macro 2013-01-03 10:27:31 +01:00
hid-debug.c HID: hid-debug: Show rdesc for unclaimed devices 2012-08-27 08:01:21 -07:00
hid-dr.c HID: Use module_hid_driver macro 2013-01-03 10:27:31 +01:00
hid-elecom.c HID: Use module_hid_driver macro 2013-01-03 10:27:31 +01:00
hid-emsff.c HID: Use module_hid_driver macro 2013-01-03 10:27:31 +01:00
hid-ezkey.c HID: Use module_hid_driver macro 2013-01-03 10:27:31 +01:00
hid-gaff.c HID: Use module_hid_driver macro 2013-01-03 10:27:31 +01:00
hid-generic.c HID: Use module_hid_driver macro 2013-01-03 10:27:31 +01:00
hid-gyration.c HID: Use module_hid_driver macro 2013-01-03 10:27:31 +01:00
hid-holtek-kbd.c HID: Use module_hid_driver macro 2013-01-03 10:27:31 +01:00
hid-holtekff.c HID: Use module_hid_driver macro 2013-01-03 10:27:31 +01:00
hid-hyperv.c Drivers: hid: hid-hyperv: Use consolidated GUID definitions 2013-01-25 11:17:31 -08:00
hid-icade.c HID: Use module_hid_driver macro 2013-01-03 10:27:31 +01:00
hid-ids.h Merge branches 'for-3.9/sony' and 'for-3.9/steelseries' into for-linus 2013-02-21 10:45:52 +01:00
hid-input.c Merge branches 'for-3.7/upstream-fixes', 'for-3.8/hidraw', 'for-3.8/i2c-hid', 'for-3.8/multitouch', 'for-3.8/roccat', 'for-3.8/sensors' and 'for-3.8/upstream' into for-linus 2012-12-12 21:41:55 +01:00
hid-kensington.c HID: Use module_hid_driver macro 2013-01-03 10:27:31 +01:00
hid-keytouch.c HID: Use module_hid_driver macro 2013-01-03 10:27:31 +01:00
hid-kye.c HID: Use module_hid_driver macro 2013-01-03 10:27:31 +01:00
hid-lcpower.c HID: Use module_hid_driver macro 2013-01-03 10:27:31 +01:00
hid-lenovo-tpkbd.c HID: Use module_hid_driver macro 2013-01-03 10:27:31 +01:00
hid-lg2ff.c
hid-lg3ff.c
hid-lg4ff.c HID: LG4FF: Remove unnecessary deadzone code 2013-02-20 10:19:10 +01:00
hid-lg.c Merge branches 'for-3.9/logitech', 'for-3.9/multitouch', 'for-3.9/ntrig', 'for-3.9/thingm' and 'for-3.9/upstream' into for-linus 2013-02-21 10:45:01 +01:00
hid-lg.h HID: hid-lg4ff: Adjust X axis input value accordingly to selected range. 2012-09-25 15:41:02 +02:00
hid-lgff.c
hid-logitech-dj.c HID: Fix logitech-dj: missing Unifying device issue 2012-09-22 10:58:48 +02:00
hid-logitech-dj.h HID: Fix logitech-dj: missing Unifying device issue 2012-09-22 10:58:48 +02:00
hid-magicmouse.c HID: Use module_hid_driver macro 2013-01-03 10:27:31 +01:00
hid-microsoft.c HID: Use module_hid_driver macro 2013-01-03 10:27:31 +01:00
hid-monterey.c HID: Use module_hid_driver macro 2013-01-03 10:27:31 +01:00
hid-multitouch.c Merge branches 'for-3.9/logitech', 'for-3.9/multitouch', 'for-3.9/ntrig', 'for-3.9/thingm' and 'for-3.9/upstream' into for-linus 2013-02-21 10:45:01 +01:00
hid-ntrig.c Merge branches 'for-3.9/logitech', 'for-3.9/multitouch', 'for-3.9/ntrig', 'for-3.9/thingm' and 'for-3.9/upstream' into for-linus 2013-02-21 10:45:01 +01:00
hid-ortek.c HID: Use module_hid_driver macro 2013-01-03 10:27:31 +01:00
hid-petalynx.c HID: Use module_hid_driver macro 2013-01-03 10:27:31 +01:00
hid-picolcd_backlight.c
hid-picolcd_cir.c [media] hid-picolcd_cir: fix compilation 2012-10-31 17:52:15 -02:00
hid-picolcd_core.c HID: Use module_hid_driver macro 2013-01-03 10:27:31 +01:00
hid-picolcd_debugfs.c HID: picoLCD: optimize for inactive debugfs 2012-10-01 10:25:01 +02:00
hid-picolcd_fb.c Merge branch 'for-3.7' of git://git.kernel.org/pub/scm/linux/kernel/git/tj/wq 2012-10-02 09:54:49 -07:00
hid-picolcd_lcd.c
hid-picolcd_leds.c
hid-picolcd.h HID: picolcd: fix build error if !CONFIG_DEBUG_FS 2012-09-11 16:06:22 +02:00
hid-pl.c HID: Support Jess/Saitek Color Rumble Pad 2013-01-17 11:06:09 +01:00
hid-primax.c HID: Use module_hid_driver macro 2013-01-03 10:27:31 +01:00
hid-prodikeys.c HID: Use module_hid_driver macro 2013-01-03 10:27:31 +01:00
hid-ps3remote.c HID: Use module_hid_driver macro 2013-01-03 10:27:31 +01:00
hid-roccat-arvo.c
hid-roccat-arvo.h
hid-roccat-common.c
hid-roccat-common.h
hid-roccat-isku.c HID: roccat: add sysfs attr "reset" for Isku 2012-11-12 15:30:27 +01:00
hid-roccat-isku.h HID: roccat: add sysfs attr "reset" for Isku 2012-11-12 15:30:27 +01:00
hid-roccat-kone.c
hid-roccat-kone.h
hid-roccat-koneplus.c HID: roccat: deprecate some Koneplus attributes 2012-11-12 15:30:28 +01:00
hid-roccat-koneplus.h HID: roccat: fix wrong attr size for koneplus tcu 2012-11-18 22:58:28 +01:00
hid-roccat-kovaplus.c HID: roccat: deprecate some Kovaplus attributes 2012-11-12 15:30:29 +01:00
hid-roccat-kovaplus.h HID: roccat: deprecate some Kovaplus attributes 2012-11-12 15:30:29 +01:00
hid-roccat-lua.c HID: Use module_hid_driver macro 2013-01-03 10:27:31 +01:00
hid-roccat-lua.h HID: roccat: add support for Roccat Lua 2012-10-17 10:44:47 +02:00
hid-roccat-pyra.c HID: roccat: deprecated some Pyra attributes 2012-11-12 15:30:28 +01:00
hid-roccat-pyra.h HID: roccat: deprecated some Pyra attributes 2012-11-12 15:30:28 +01:00
hid-roccat-savu.c HID: roccat: enable Savu device reset 2012-11-05 13:17:39 +01:00
hid-roccat-savu.h
hid-roccat.c
hid-saitek.c HID: Use module_hid_driver macro 2013-01-03 10:27:31 +01:00
hid-samsung.c HID: Use module_hid_driver macro 2013-01-03 10:27:31 +01:00
hid-sensor-hub.c Merge branches 'for-3.9/logitech', 'for-3.9/multitouch', 'for-3.9/ntrig', 'for-3.9/thingm' and 'for-3.9/upstream' into for-linus 2013-02-21 10:45:01 +01:00
hid-sjoy.c HID: Use module_hid_driver macro 2013-01-03 10:27:31 +01:00
hid-sony.c Merge branches 'for-3.9/sony' and 'for-3.9/steelseries' into for-linus 2013-02-21 10:45:52 +01:00
hid-speedlink.c HID: Use module_hid_driver macro 2013-01-03 10:27:31 +01:00
hid-steelseries.c HID: steelseries: fix out of bound array access 2013-01-31 16:51:47 +01:00
hid-sunplus.c HID: Use module_hid_driver macro 2013-01-03 10:27:31 +01:00
hid-thingm.c HID: add ThingM blink(1) USB RGB LED support 2013-02-19 11:31:46 +01:00
hid-tivo.c HID: Use module_hid_driver macro 2013-01-03 10:27:31 +01:00
hid-tmff.c HID: Use module_hid_driver macro 2013-01-03 10:27:31 +01:00
hid-topseed.c HID: Use module_hid_driver macro 2013-01-03 10:27:31 +01:00
hid-twinhan.c HID: Use module_hid_driver macro 2013-01-03 10:27:31 +01:00
hid-uclogic.c HID: Use module_hid_driver macro 2013-01-03 10:27:31 +01:00
hid-wacom.c HID: Use module_hid_driver macro 2013-01-03 10:27:31 +01:00
hid-waltop.c HID: Use module_hid_driver macro 2013-01-03 10:27:31 +01:00
hid-wiimote-core.c HID: Use module_hid_driver macro 2013-01-03 10:27:31 +01:00
hid-wiimote-debug.c HID: Fix uninitialized variable "size" in hid-wiimote-debug 2013-01-18 10:59:24 +01:00
hid-wiimote-ext.c HID: wiimote: fix nunchuck button parser 2013-02-18 10:41:52 +01:00
hid-wiimote.h
hid-zpff.c HID: Use module_hid_driver macro 2013-01-03 10:27:31 +01:00
hid-zydacron.c HID: Use module_hid_driver macro 2013-01-03 10:27:31 +01:00
hidraw.c HID: hidraw: print message when succesfully initialized 2013-02-19 14:05:34 +01:00
Kconfig Merge branch 'for-linus' of git://git.kernel.org/pub/scm/linux/kernel/git/jikos/hid 2013-02-21 17:41:38 -08:00
Makefile Merge branches 'for-3.9/sony' and 'for-3.9/steelseries' into for-linus 2013-02-21 10:45:52 +01:00
uhid.c HID: uhid: make creating devices work on 64/32 systems 2013-02-18 11:28:16 +01:00