drivers/block/swim3.c: fix null pointer dereference
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>
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1 changed files with 4 additions and 1 deletions
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@ -1090,10 +1090,13 @@ static const struct block_device_operations floppy_fops = {
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static void swim3_mb_event(struct macio_dev* mdev, int mb_state)
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static void swim3_mb_event(struct macio_dev* mdev, int mb_state)
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{
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{
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struct floppy_state *fs = macio_get_drvdata(mdev);
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struct floppy_state *fs = macio_get_drvdata(mdev);
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struct swim3 __iomem *sw = fs->swim3;
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struct swim3 __iomem *sw;
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if (!fs)
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if (!fs)
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return;
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return;
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sw = fs->swim3;
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if (mb_state != MB_FD)
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if (mb_state != MB_FD)
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return;
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return;
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