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authorLinus Torvalds <torvalds@woody.linux-foundation.org>2007-10-16 10:09:16 -0700
committerLinus Torvalds <torvalds@woody.linux-foundation.org>2007-10-16 10:09:16 -0700
commit92d15c2ccbb3e31a3fc71ad28fdb55e1319383c0 (patch)
tree8d83c0dc3c6b935d8367e331872f242b742f0a8a /mm
parentf20bf6125605acbbc7eb8c9420d7221c91aa83eb (diff)
parent644bd2f048972d75eb1979b1fdca257d528ce687 (diff)
Merge branch 'for-linus' of git://git.kernel.dk/data/git/linux-2.6-block
* 'for-linus' of git://git.kernel.dk/data/git/linux-2.6-block: (63 commits) Fix memory leak in dm-crypt SPARC64: sg chaining support SPARC: sg chaining support PPC: sg chaining support PS3: sg chaining support IA64: sg chaining support x86-64: enable sg chaining x86-64: update pci-gart iommu to sg helpers x86-64: update nommu to sg helpers x86-64: update calgary iommu to sg helpers swiotlb: sg chaining support i386: enable sg chaining i386 dma_map_sg: convert to using sg helpers mmc: need to zero sglist on init Panic in blk_rq_map_sg() from CCISS driver remove sglist_len remove blk_queue_max_phys_segments in libata revert sg segment size ifdefs Fixup u14-34f ENABLE_SG_CHAINING qla1280: enable use_sg_chaining option ...
Diffstat (limited to 'mm')
-rw-r--r--mm/bounce.c6
1 files changed, 6 insertions, 0 deletions
diff --git a/mm/bounce.c b/mm/bounce.c
index 3b549bf31f7..b6d2d0f1019 100644
--- a/mm/bounce.c
+++ b/mm/bounce.c
@@ -265,6 +265,12 @@ void blk_queue_bounce(struct request_queue *q, struct bio **bio_orig)
mempool_t *pool;
/*
+ * Data-less bio, nothing to bounce
+ */
+ if (bio_empty_barrier(*bio_orig))
+ return;
+
+ /*
* for non-isa bounce case, just check if the bounce pfn is equal
* to or bigger than the highest pfn in the system -- in that case,
* don't waste time iterating over bio segments