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blk: fix wrong idr_pre_get() error check in loop.c

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The idr_pre_get() function never returns a value < 0.  It returns 0 (no
memory) or 1 (OK).

Reported-by: Silva Paulo <psdasilva@yahoo.com>
[ Rewrote Silva's patch, but attributing it to Silva anyway  - Linus ]
Signed-off-by: Linus Torvalds <torvalds@linux-foundation.org>
This commit is contained in:
Silva Paulo 2012-07-14 15:39:58 -07:00 • committed by Linus Torvalds
parent 1daaa5e4ff
commit 68d740d79c
1 changed files with 3 additions and 5 deletions
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8
drivers/block/loop.c
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@ -1597,14 +1597,12 @@ static int loop_add(struct loop_device **l, int i)
struct gendisk *disk; struct gendisk *disk;
int err; int err;
lo = kzalloc(sizeof(*lo), GFP_KERNEL);
if (!lo) {
err = -ENOMEM; err = -ENOMEM;
lo = kzalloc(sizeof(*lo), GFP_KERNEL);
if (!lo)
goto out; goto out;
}
err = idr_pre_get(&loop_index_idr, GFP_KERNEL); if (!idr_pre_get(&loop_index_idr, GFP_KERNEL))
if (err < 0)
goto out_free_dev; goto out_free_dev;
if (i >= 0) { if (i >= 0) {