HID: hid-sensor-hub: Allow parallel synchronous reads

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Current implementation only allows one outstanding synchronous read.
This is a performance hit when user mode is requesting raw reads
of sensor attributes on multiple sensors together.
This change changes the mutex lock to per hid sensor hub device instead
of global lock. Although request to hid sensor hub is serialized, there
can be multiple outstanding read requests pending for responses via
hid reports.

Signed-off-by: Srinivas Pandruvada <srinivas.pandruvada@linux.intel.com>
Acked-by: Jonathan Cameron <jic23@kernel.org>
Signed-off-by: Jiri Kosina <jkosina@suse.cz>

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Srinivas Pandruvada 2015-02-19 15:31:25 -08:00 • committed by Jiri Kosina

parent 870fd0f5df

commit e651a1da44

2 changed files with 65 additions and 49 deletions

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90

drivers/hid/hid-sensor-hub.c

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24

include/linux/hid-sensor-hub.h

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