* [PATCH] block: swim3.c: fix null pointer dereference
@ 2013-01-14 17:20 Cong Ding
0 siblings, 0 replies; only message in thread
From: Cong Ding @ 2013-01-14 17:20 UTC (permalink / raw)
To: Andrew Morton, Greg Kroah-Hartman, Kent Overstreet, linux-kernel
Cc: Cong Ding
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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2013-01-14 17:20 [PATCH] block: swim3.c: fix null pointer dereference Cong Ding
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