HID: hid-lg4ff: Protect concurrent access to output HID report

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Protect concurrent access to output HID report with a spinlock. The HID report
structure used to submit commands to wheels is shared amongst all functions that
need to do so and some of these functions can be executed in parallel.
Additionally, lg4ff_play() can be called from interrupt context by ff-memless
module. Locking is necessary to prevent sending bogus data to the wheels.

Signed-off-by: Michal Malý <madcatxster@devoid-pointer.net>
Signed-off-by: Jiri Kosina <jkosina@suse.cz>

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Michal Malý 2015-04-08 22:56:48 +02:00 • committed by Jiri Kosina

parent b211a6388c

commit c918fe781f

1 changed files with 110 additions and 0 deletions

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drivers/hid/hid-lg4ff.c

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