mmc: fix null pointer use in mmc_blk_remove_req

commit 8efb83a2f8518a6ffcc074177f8d659c5165ef37 upstream.

A previous commit (fdfa20c1631210d0) reordered the shutdown sequence
in mmc_blk_remove_req. However, mmc_cleanup_queue is now called before
we get the card pointer, and mmc_cleanup_queue sets mq->card to NULL.

This patch moves the card pointer assignment before mmc_cleanup_queue.

Signed-off-by: Franck Jullien <franck.jullien@gmail.com>
Signed-off-by: Chris Ball <cjb@laptop.org>
Cc: Adrian Hunter <adrian.hunter@intel.com>
Signed-off-by: Greg Kroah-Hartman <gregkh@linuxfoundation.org>

diff --git a/drivers/mmc/card/block.c b/drivers/mmc/card/block.c
index cd0b7f4a1ff2dbd58419d92dcb077379c68e3a20..f4a0beac9d36dacf4ce1e4ab72c24eb8ba914f03 100644 (file)
--- a/drivers/mmc/card/block.c
+++ b/drivers/mmc/card/block.c
@@ -2191,10 +2191,10 @@ static void mmc_blk_remove_req(struct mmc_blk_data *md)
                 * is freeing the queue that stops new requests
                 * from being accepted.
                 */
+               card = md->queue.card;
                mmc_cleanup_queue(&md->queue);
                if (md->flags & MMC_BLK_PACKED_CMD)
                        mmc_packed_clean(&md->queue);
-               card = md->queue.card;
                if (md->disk->flags & GENHD_FL_UP) {
                        device_remove_file(disk_to_dev(md->disk), &md->force_ro);
                        if ((md->area_type & MMC_BLK_DATA_AREA_BOOT) &&