i2c: piix4: Request the SMBUS semaphore inside the mutex

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[ Upstream commit bbb27fc33d ]

SMBSLVCNT must be protected with the piix4_mutex_sb800 in order to avoid
multiple buses accessing to the semaphore at the same time.

Fixes: 701dc207bf ("i2c: piix4: Avoid race conditions with IMC")
Reported-by: Jean Delvare <jdelvare@suse.de>
Signed-off-by: Ricardo Ribalda Delgado <ricardo.ribalda@gmail.com>
Signed-off-by: Jean Delvare <jdelvare@suse.de>
Signed-off-by: Wolfram Sang <wsa@the-dreams.de>
Signed-off-by: Sasha Levin <alexander.levin@verizon.com>
Signed-off-by: Greg Kroah-Hartman <gregkh@linuxfoundation.org>

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Ricardo Ribalda 2017-05-23 21:53:44 -04:00 • committed by Greg Kroah-Hartman

parent 7a6fcf38fa

commit c1a4306f24

1 changed files with 7 additions and 5 deletions

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drivers/i2c/busses/i2c-piix4.c

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