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Commit 7414d4f6 authored by Cong Ding's avatar Cong Ding Committed by Jens Axboe
Browse files

drivers/block/swim3.c: fix null pointer dereference 



The use of pointer fs should be after the null check.

Signed-off-by: default avatarCong Ding <dinggnu@gmail.com>
Cc: Jens Axboe <axboe@kernel.dk>
Signed-off-by: default avatarAndrew Morton <akpm@linux-foundation.org>
Signed-off-by: default avatarJens Axboe <axboe@kernel.dk>
parent 79d0b7f0

drivers/block/swim3.c

+4 −1
Original line number Original line Diff line number Diff line
@@ -1090,10 +1090,13 @@ static const struct block_device_operations floppy_fops = { 
static void swim3_mb_event(struct macio_dev* mdev, int mb_state)

static void swim3_mb_event(struct macio_dev* mdev, int mb_state)

{

{

	struct floppy_state *fs = macio_get_drvdata(mdev);

	struct floppy_state *fs = macio_get_drvdata(mdev);

	struct swim3 __iomem *sw = fs->swim3;

	struct swim3 __iomem *sw;





	if (!fs)

	if (!fs)

		return;

		return;



	sw = fs->swim3;



	if (mb_state != MB_FD)

	if (mb_state != MB_FD)

		return;

		return;