mmc: queue: Cancel recovery work on cleanup

To prevent any recovery work running after the queue cleanup cancel it.
Any recovery running post-cleanup dereferenced mq->card as NULL
and was not meaningful to begin with.

Cc: stable@vger.kernel.org
Signed-off-by: Christian Loehle <cloehle@hyperstone.com>
Acked-by: Adrian Hunter <adrian.hunter@intel.com>
Link: https://lore.kernel.org/r/c865c0c9789d428494b67b820a78923e@hyperstone.com
Signed-off-by: Ulf Hansson <ulf.hansson@linaro.org>

diff --git a/drivers/mmc/core/queue.c b/drivers/mmc/core/queue.c
index fefaa90..86be55d 100644 (file)
--- a/drivers/mmc/core/queue.c
+++ b/drivers/mmc/core/queue.c
@@ -493,6 +493,13 @@ void mmc_cleanup_queue(struct mmc_queue *mq)
        if (blk_queue_quiesced(q))
                blk_mq_unquiesce_queue(q);
 
+       /*
+        * If the recovery completes the last (and only remaining) request in
+        * the queue, and the card has been removed, we could end up here with
+        * the recovery not quite finished yet, so cancel it.
+        */
+       cancel_work_sync(&mq->recovery_work);
+
        blk_mq_free_tag_set(&mq->tag_set);
 
        /*