tree 6a33a32265f7e7f455d0f3b51fac880d777e4ecc
parent 4550a7f409cbc13ce220f606440457f327ba6cd7
author Madhuparna Bhowmik <madhuparnabhowmik10@gmail.com> 1598076928 +0530
committer Greg Kroah-Hartman <gregkh@linuxfoundation.org> 1604570921 +0100

mmc: via-sdmmc: Fix data race bug

[ Upstream commit 87d7ad089b318b4f319bf57f1daa64eb6d1d10ad ]

via_save_pcictrlreg() should be called with host->lock held
as it writes to pm_pcictrl_reg, otherwise there can be a race
condition between via_sd_suspend() and via_sdc_card_detect().
The same pattern is used in the function via_reset_pcictrl()
as well, where via_save_pcictrlreg() is called with host->lock
held.

Found by Linux Driver Verification project (linuxtesting.org).

Signed-off-by: Madhuparna Bhowmik <madhuparnabhowmik10@gmail.com>
Link: https://lore.kernel.org/r/20200822061528.7035-1-madhuparnabhowmik10@gmail.com
Signed-off-by: Ulf Hansson <ulf.hansson@linaro.org>
Signed-off-by: Sasha Levin <sashal@kernel.org>