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mmc: hsq: Fix data stomping during mmc recovery

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commit e7afa79a3b upstream.

The block device uses multiple queues to access emmc. There will be up to 3
requests in the hsq of the host. The current code will check whether there
is a request doing recovery before entering the queue, but it will not check
whether there is a request when the lock is issued. The request is in recovery
mode. If there is a request in recovery, then a read and write request is
initiated at this time, and the conflict between the request and the recovery
request will cause the data to be trampled.

Signed-off-by: Wenchao Chen <wenchao.chen@unisoc.com>
Fixes: 511ce378e1 ("mmc: Add MMC host software queue support")
Cc: stable@vger.kernel.org
Link: https://lore.kernel.org/r/20220916090506.10662-1-wenchao.chen666@gmail.com
Signed-off-by: Ulf Hansson <ulf.hansson@linaro.org>
Signed-off-by: Greg Kroah-Hartman <gregkh@linuxfoundation.org>
This commit is contained in:
Wenchao Chen 2022-09-16 17:05:06 +08:00 • committed by Justin Hammond
parent e7459beb46
commit 55f44bb939
1 changed files with 1 additions and 1 deletions
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2
drivers/mmc/host/mmc_hsq.c
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@ -34,7 +34,7 @@ static void mmc_hsq_pump_requests(struct mmc_hsq *hsq)
spin_lock_irqsave(&hsq->lock, flags);
/* Make sure we are not already running a request now */
if (hsq->mrq) {
if (hsq->mrq || hsq->recovery_halt) {
spin_unlock_irqrestore(&hsq->lock, flags);
return;
}