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

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

Signed-off-by: Cong Ding <dinggnu@gmail.com>
Cc: Jens Axboe <axboe@kernel.dk>
Signed-off-by: Andrew Morton <akpm@linux-foundation.org>
Signed-off-by: Jens Axboe <axboe@kernel.dk>
This commit is contained in:
Cong Ding 2013-02-21 15:16:40 -08:00 committed by Jens Axboe
parent 79d0b7f0e3
commit 7414d4f64b
1 changed files with 4 additions and 1 deletions
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5
drivers/block/swim3.c
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@ -1090,10 +1090,13 @@ static const struct block_device_operations floppy_fops = {
static void swim3_mb_event(struct macio_dev* mdev, int mb_state)
{
struct floppy_state *fs = macio_get_drvdata(mdev);
struct swim3 __iomem *sw = fs->swim3;
struct swim3 __iomem *sw;
if (!fs)
return;
sw = fs->swim3;
if (mb_state != MB_FD)
return;