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David Herrmann d937ae5fae HID: uhid: implement read() on uhid devices 
User-space can use read() to get a single event from uhid devices. read()
does never return multiple events. This allows us to extend the event
structure and still keep backwards compatibility.

If user-space wants to get multiple events in one syscall, they should use
the readv()/writev() syscalls which are supported by uhid.

This introduces a new lock which helps us synchronizing simultaneous reads
from user-space. We also correctly return -EINVAL/-EFAULT only on errors
and retry the read() when some other thread captured the event faster than
we did.

Signed-off-by: David Herrmann <dh.herrmann@googlemail.com>
Signed-off-by: Jiri Kosina <jkosina@suse.cz>
2012-06-18 13:42:00 +02:00
..
usbhid
Merge branch 'for-linus' of git://git.kernel.org/pub/scm/linux/kernel/git/jikos/hid
2012-05-22 19:21:48 -07:00
hid-a4tech.c
HID: Add and use hid_<level>: dev_<level> equivalents
2010-12-10 15:10:38 +01:00
hid-apple.c
Merge branches 'upstream-fixes', 'wacom' and 'waltop' into for-linus
2012-05-22 11:35:11 +02:00
hid-aureal.c
HID: Aureal Remote Control Device Driver
2012-04-13 18:15:57 +02:00
hid-axff.c
hid: Add module.h to fix up implicit users of it
2011-10-31 19:31:17 -04:00
hid-belkin.c
HID: Add and use hid_<level>: dev_<level> equivalents
2010-12-10 15:10:38 +01:00
hid-cherry.c
HID: Add and use hid_<level>: dev_<level> equivalents
2010-12-10 15:10:38 +01:00
hid-chicony.c
HID: add more hotkeys in Asus AIO keyboards
2012-02-02 10:32:45 +01:00
hid-core.c
Merge branches 'upstream-fixes', 'wacom' and 'waltop' into for-linus
2012-05-22 11:35:11 +02:00
hid-cypress.c
HID: Add and use hid_<level>: dev_<level> equivalents
2010-12-10 15:10:38 +01:00
hid-debug.c
Merge branches 'hyperv', 'multitouch', 'roccat', 'upstream', 'upstream-fixes', 'wacom' and 'wiimote' into for-linus
2012-01-05 15:51:02 +01:00
hid-dr.c
hid: Add module.h to fix up implicit users of it
2011-10-31 19:31:17 -04:00
hid-elecom.c
HID: Add and use hid_<level>: dev_<level> equivalents
2010-12-10 15:10:38 +01:00
hid-emsff.c
Merge branches 'hyperv', 'multitouch', 'roccat', 'upstream', 'upstream-fixes', 'wacom' and 'wiimote' into for-linus
2012-01-05 15:51:02 +01:00
hid-ezkey.c
HID: adding __init/__exit macros to module init/exit functions
2009-07-23 01:28:01 +02:00
hid-gaff.c
hid: Add module.h to fix up implicit users of it
2011-10-31 19:31:17 -04:00
hid-generic.c
HID: Create a common generic driver
2012-05-01 12:54:55 +02:00
hid-gyration.c
HID: Add teletext/color keys - gyration remote - EU version (GYAR3101CKDE)
2011-02-15 10:29:57 +01:00
hid-holtekff.c
hid: Add module.h to fix up implicit users of it
2011-10-31 19:31:17 -04:00
hid-hyperv.c
HID: hyperv: Set the hid drvdata correctly
2012-05-17 10:01:07 +02:00
hid-ids.h
Merge branches 'upstream-fixes', 'wacom' and 'waltop' into for-linus
2012-05-22 11:35:11 +02:00
hid-input.c
Merge branches 'upstream-fixes', 'wacom' and 'waltop' into for-linus
2012-05-22 11:35:11 +02:00
hid-kensington.c
HID: adding __init/__exit macros to module init/exit functions
2009-07-23 01:28:01 +02:00
hid-keytouch.c
HID: add support for Keytouch IEC 60945
2011-02-17 15:12:45 +01:00
hid-kye.c
HID: kye: Add support for 3 tablets
2012-02-28 13:37:12 +01:00
hid-lcpower.c
HID: hid-lcpower: fix key mapping
2011-02-13 15:04:51 +01:00
hid-lg2ff.c
HID: Add and use hid_<level>: dev_<level> equivalents
2010-12-10 15:10:38 +01:00
hid-lg3ff.c
HID: Add and use hid_<level>: dev_<level> equivalents
2010-12-10 15:10:38 +01:00
hid-lg4ff.c
HID: hid-lg4ff: remove unused label in !LEDS_CLASS case
2012-04-23 21:08:15 +02:00
hid-lg.c
HID: hid-lg: Allow for custom device-specific properties to be stored in priv drvdata
2012-04-03 04:09:50 +02:00
hid-lg.h
HID: lg4ff: Remove sysfs iface before deallocating memory
2012-04-03 04:11:12 +02:00
hid-lgff.c
HID: lg4ff - Move handling of Logitech wheels to lg4ff driver
2011-08-04 16:45:55 +02:00
hid-logitech-dj.c
Merge branches 'upstream-fixes', 'wacom' and 'waltop' into for-linus
2012-05-22 11:35:11 +02:00
hid-logitech-dj.h
HID: hid-logitech-dj: fix off by one
2011-09-20 16:09:22 +02:00
hid-magicmouse.c
HID: hid-magicmouse: Add pointer and buttonpad properties for Magic Trackpad
2012-02-21 11:52:20 +01:00
hid-microsoft.c
HID: fix horizontal wheel for ms comfort mouse 4500
2011-07-12 10:31:56 +02:00
hid-monterey.c
HID: Add and use hid_<level>: dev_<level> equivalents
2010-12-10 15:10:38 +01:00
hid-multitouch.c
HID: hid-multitouch: fix wrong protocol detection
2012-05-10 11:35:43 +02:00
hid-ntrig.c
HID: hid-ntrig: init settle and mode check
2011-03-14 13:10:13 +01:00
hid-ortek.c
HID: add support for Skycable 0x3f07 wireless presenter
2011-03-21 16:12:23 +01:00
hid-petalynx.c
HID: Add and use hid_<level>: dev_<level> equivalents
2010-12-10 15:10:38 +01:00
hid-picolcd.c
simple_open: automatically convert to simple_open()
2012-04-05 15:25:50 -07:00
hid-pl.c
misc latin1 to utf8 conversions
2012-01-02 13:04:55 +01:00
hid-primax.c
HID: support primax keyboards violating USB HID spec
2011-10-17 17:04:41 +02:00
hid-prodikeys.c
module_param: make bool parameters really bool (drivers & misc)
2012-01-13 09:32:20 +10:30
hid-roccat-arvo.c
HID: roccat: fix NULL pointer dereference, add range checks
2011-06-13 13:06:23 +02:00
hid-roccat-arvo.h
HID: roccat: correction and cleanup of HID feature reports
2011-06-13 12:52:57 +02:00
hid-roccat-common.c
Merge branches 'hyperv', 'multitouch', 'roccat', 'upstream', 'upstream-fixes', 'wacom' and 'wiimote' into for-linus
2012-01-05 15:51:02 +01:00
hid-roccat-common.h
HID: roccat: correction and cleanup of HID feature reports
2011-06-13 12:52:57 +02:00
hid-roccat-isku.c
HID: roccat: Add support for Isku keyboard
2011-12-06 10:21:10 +01:00
hid-roccat-isku.h
HID: roccat: Add support for Isku keyboard
2011-12-06 10:21:10 +01:00
hid-roccat-kone.c
HID: roccat: Use kmemdup rather than duplicating its implementation
2011-11-20 00:42:42 +01:00
hid-roccat-kone.h
HID: roccat: correction and cleanup of HID feature reports
2011-06-13 12:52:57 +02:00
hid-roccat-koneplus.c
HID: roccat: fix NULL pointer dereference, add range checks
2011-06-13 13:06:23 +02:00
hid-roccat-koneplus.h
HID: roccat: correction and cleanup of HID feature reports
2011-06-13 12:52:57 +02:00
hid-roccat-kovaplus.c
HID: roccat: Kovaplus now reports external profile changes via roccat device
2011-09-07 13:38:27 +02:00
hid-roccat-kovaplus.h
HID: roccat: correction and cleanup of HID feature reports
2011-06-13 12:52:57 +02:00
hid-roccat-pyra.c
HID: roccat: Pyra now reports external profile changes via roccat device
2011-09-07 13:38:27 +02:00
hid-roccat-pyra.h
HID: roccat: correction and cleanup of HID feature reports
2011-06-13 12:52:57 +02:00
hid-roccat.c
Merge branch 'modsplit-Oct31_2011' of git://git.kernel.org/pub/scm/linux/kernel/git/paulg/linux
2011-11-06 19:44:47 -08:00
hid-saitek.c
HID: add new driver for non-compliant Saitek devices
2012-02-22 11:30:17 +01:00
hid-samsung.c
HID: Add and use hid_<level>: dev_<level> equivalents
2010-12-10 15:10:38 +01:00
hid-sjoy.c
HID: sjoy: Add device ID for Super Joy Box 3
2012-02-21 14:16:36 +01:00
hid-sony.c
HID: hid-sony: fix endiannes of Sixaxis accel/gyro values
2011-06-13 13:21:30 +02:00
hid-speedlink.c
HID: Add driver to fix Speedlink VAD Cezanne support
2011-06-08 09:45:37 +02:00
hid-sunplus.c
HID: Add and use hid_<level>: dev_<level> equivalents
2010-12-10 15:10:38 +01:00
hid-tivo.c
HID: tivo: fix support for bluetooth version of tivo Slide
2012-03-30 15:28:59 +02:00
hid-tmff.c
hid: Add module.h to fix up implicit users of it
2011-10-31 19:31:17 -04:00
hid-topseed.c
HID: Add support for Perixx PERIBOARD-707 (Plus)
2010-11-25 15:59:02 +01:00
hid-twinhan.c
misc latin1 to utf8 conversions
2012-01-02 13:04:55 +01:00
hid-uclogic.c
HID: uclogic: Add support for UC-Logic TWHL850
2012-05-15 09:50:19 +02:00
hid-wacom.c
HID: wacom: Unify speed setting
2012-05-16 21:42:16 +02:00
hid-waltop.c
HID: waltop: Extend barrel button fix
2012-05-21 13:21:18 +02:00
hid-wiimote-core.c
HID: wiimote: Fix IR data parser
2012-05-09 11:40:51 +02:00
hid-wiimote-debug.c
simple_open: automatically convert to simple_open()
2012-04-05 15:25:50 -07:00
hid-wiimote-ext.c
HID: wiimote: Parse classic controller data
2011-11-22 23:10:10 +01:00
hid-wiimote.h
HID: wiimote: Allow direct DRM debug access
2011-11-22 23:11:10 +01:00
hid-zpff.c
hid: Add module.h to fix up implicit users of it
2011-10-31 19:31:17 -04:00
hid-zydacron.c
HID: zydacron: kfree() NULL pointer cleanup
2011-08-04 23:51:29 +02:00
hidraw.c
HID: hidraw: add proper error handling to raw event reporting
2012-04-27 20:10:09 +02:00
Kconfig
HID: uhid: introduce user-space I/O driver support for HID
2012-06-18 13:41:59 +02:00
Makefile
HID: uhid: introduce user-space I/O driver support for HID
2012-06-18 13:41:59 +02:00
uhid.c
HID: uhid: implement read() on uhid devices
2012-06-18 13:42:00 +02:00