forked from luck/tmp_suning_uos_patched
f50f9aabf3
The input core has an internal spinlock that is acquired during event injection via input_event() and friends but also held during FF callbacks. That means, there is no way to share a lock between event-injection and FF handling. Unfortunately, this is what is required for wiimote state tracking and what we do with state.lock and input->lock. This deadlock can be triggered when using continuous data reporting and FF on a wiimote device at the same time. I takes me at least 30m of stress-testing to trigger it but users reported considerably shorter times (http://bpaste.net/show/132504/) when using some gaming-console emulators. The real problem is that we have two copies of internal state, one in the wiimote objects and the other in the input device. As the input-lock is not supposed to be accessed from outside of input-core, we have no other chance than offloading FF handling into a worker. This actually works pretty nice and also allows to implictly merge fast rumble changes into a single request. Due to the 3-layered workers (rumble+queue+l2cap) this might reduce FF responsiveness. Initial tests were fine so lets fix the race first and if it turns out to be too slow we can always handle FF out-of-band and skip the queue-worker. Cc: <stable@vger.kernel.org> # 3.11+ Reported-by: Thomas Schneider Signed-off-by: David Herrmann <dh.herrmann@gmail.com> Signed-off-by: Jiri Kosina <jkosina@suse.cz> |
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| .. | ||
| i2c-hid | ||
| usbhid | ||
| hid-a4tech.c | ||
| hid-apple.c | ||
| hid-appleir.c | ||
| hid-aureal.c | ||
| hid-axff.c | ||
| hid-belkin.c | ||
| hid-cherry.c | ||
| hid-chicony.c | ||
| hid-core.c | ||
| hid-cypress.c | ||
| hid-debug.c | ||
| hid-dr.c | ||
| hid-elecom.c | ||
| hid-elo.c | ||
| hid-emsff.c | ||
| hid-ezkey.c | ||
| hid-gaff.c | ||
| hid-generic.c | ||
| hid-gyration.c | ||
| hid-holtek-kbd.c | ||
| hid-holtek-mouse.c | ||
| hid-holtekff.c | ||
| hid-huion.c | ||
| hid-hyperv.c | ||
| hid-icade.c | ||
| hid-ids.h | ||
| hid-input.c | ||
| hid-kensington.c | ||
| hid-keytouch.c | ||
| hid-kye.c | ||
| hid-lcpower.c | ||
| hid-lenovo-tpkbd.c | ||
| hid-lg2ff.c | ||
| hid-lg3ff.c | ||
| hid-lg4ff.c | ||
| hid-lg.c | ||
| hid-lg.h | ||
| hid-lgff.c | ||
| hid-logitech-dj.c | ||
| hid-logitech-dj.h | ||
| hid-magicmouse.c | ||
| hid-microsoft.c | ||
| hid-monterey.c | ||
| hid-multitouch.c | ||
| hid-ntrig.c | ||
| hid-ortek.c | ||
| hid-petalynx.c | ||
| hid-picolcd_backlight.c | ||
| hid-picolcd_cir.c | ||
| hid-picolcd_core.c | ||
| hid-picolcd_debugfs.c | ||
| hid-picolcd_fb.c | ||
| hid-picolcd_lcd.c | ||
| hid-picolcd_leds.c | ||
| hid-picolcd.h | ||
| hid-pl.c | ||
| hid-primax.c | ||
| hid-prodikeys.c | ||
| hid-roccat-arvo.c | ||
| hid-roccat-arvo.h | ||
| hid-roccat-common.c | ||
| hid-roccat-common.h | ||
| hid-roccat-isku.c | ||
| hid-roccat-isku.h | ||
| hid-roccat-kone.c | ||
| hid-roccat-kone.h | ||
| hid-roccat-koneplus.c | ||
| hid-roccat-koneplus.h | ||
| hid-roccat-konepure.c | ||
| hid-roccat-konepure.h | ||
| hid-roccat-kovaplus.c | ||
| hid-roccat-kovaplus.h | ||
| hid-roccat-lua.c | ||
| hid-roccat-lua.h | ||
| hid-roccat-pyra.c | ||
| hid-roccat-pyra.h | ||
| hid-roccat-savu.c | ||
| hid-roccat-savu.h | ||
| hid-roccat.c | ||
| hid-saitek.c | ||
| hid-samsung.c | ||
| hid-sensor-hub.c | ||
| hid-sjoy.c | ||
| hid-sony.c | ||
| hid-speedlink.c | ||
| hid-steelseries.c | ||
| hid-sunplus.c | ||
| hid-thingm.c | ||
| hid-tivo.c | ||
| hid-tmff.c | ||
| hid-topseed.c | ||
| hid-twinhan.c | ||
| hid-uclogic.c | ||
| hid-wacom.c | ||
| hid-waltop.c | ||
| hid-wiimote-core.c | ||
| hid-wiimote-debug.c | ||
| hid-wiimote-modules.c | ||
| hid-wiimote.h | ||
| hid-xinmo.c | ||
| hid-zpff.c | ||
| hid-zydacron.c | ||
| hidraw.c | ||
| Kconfig | ||
| Makefile | ||
| uhid.c | ||