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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>
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@ -248,7 +248,8 @@ int __sg_alloc_table(struct sg_table *table, unsigned int nents,
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unsigned int left;
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#ifndef ARCH_HAS_SG_CHAIN
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BUG_ON(nents > max_ents);
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if (WARN_ON_ONCE(nents > max_ents))
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return -EINVAL;
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#endif
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memset(table, 0, sizeof(*table));
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