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| author | Nick Bowler <nbowler@elliptictech.com> | 2012-12-17 16:05:20 -0800 |
|---|---|---|
| committer | Linus Torvalds <torvalds@linux-foundation.org> | 2012-12-17 17:15:28 -0800 |
| commit | 6fd59a83b9261fa53eaf98fb5514abba504a3ea3 (patch) | |
| tree | 08dfeef55544c0c30e1567618f62ae771feeac53 /lib/scatterlist.c | |
| parent | e71ec593201e1b367b5f22955e3db49e3c562e67 (diff) | |
| download | lwn-6fd59a83b9261fa53eaf98fb5514abba504a3ea3.tar.gz lwn-6fd59a83b9261fa53eaf98fb5514abba504a3ea3.zip | |
scatterlist: don't BUG when we can trivially return a proper error.
There is absolutely no reason to crash the kernel when we have a
perfectly good return value already available to use for conveying
failure status.
Let's return an error code instead of crashing the kernel: that sounds
like a much better plan.
[akpm@linux-foundation.org: s/E2BIG/EINVAL/]
Signed-off-by: Nick Bowler <nbowler@elliptictech.com>
Cc: Maxim Levitsky <maximlevitsky@gmail.com>
Cc: Tejun Heo <tj@kernel.org>
Cc: Jens Axboe <axboe@kernel.dk>
Signed-off-by: Andrew Morton <akpm@linux-foundation.org>
Signed-off-by: Linus Torvalds <torvalds@linux-foundation.org>
Diffstat (limited to 'lib/scatterlist.c')
| -rw-r--r-- | lib/scatterlist.c | 3 |
1 files changed, 2 insertions, 1 deletions
diff --git a/lib/scatterlist.c b/lib/scatterlist.c index 3675452b23ca..7874b01e816e 100644 --- a/lib/scatterlist.c +++ b/lib/scatterlist.c @@ -248,7 +248,8 @@ int __sg_alloc_table(struct sg_table *table, unsigned int nents, unsigned int left; #ifndef ARCH_HAS_SG_CHAIN - BUG_ON(nents > max_ents); + if (WARN_ON_ONCE(nents > max_ents)) + return -EINVAL; #endif memset(table, 0, sizeof(*table)); |