Messages in this thread Patch in this message | | | From | Cong Ding <> | Subject | [PATCH] block: swim3.c: fix null pointer dereference | Date | Mon, 14 Jan 2013 17:20:38 +0000 |
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the use if pointer fs should be after the null check.
Signed-off-by: Cong Ding <dinggnu@gmail.com> --- drivers/block/swim3.c | 5 ++++- 1 file changed, 4 insertions(+), 1 deletion(-)
diff --git a/drivers/block/swim3.c b/drivers/block/swim3.c index d889f95..deb722d 100644 --- a/drivers/block/swim3.c +++ b/drivers/block/swim3.c @@ -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; -- 1.7.9.5
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