greybus: loopback: make loopback code thread safe

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Current code allows a sysfs callback and a kernel worker thread to write
all over and act upon data that could be in the process of being updated by
the other. This patch adds a reasonably coarse mutex to enscure sync
between the two.

Signed-off-by: Bryan O'Donoghue <bryan.odonoghue@linaro.org>
Signed-off-by: Greg Kroah-Hartman <gregkh@google.com>

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Bryan O'Donoghue 2015-07-28 18:34:36 +01:00 • committed by Greg Kroah-Hartman

parent a7e60062b0

commit 85d678c0be

1 changed files with 16 additions and 4 deletions

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drivers/staging/greybus/loopback.c

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