Gitweb:
http://git.kernel.org/git/?p=linux/kernel/git/torvalds/linux-2.6.git;a=commit;h=db0a2e0099be3a1cff55879225881465f16c67d3
Commit: db0a2e0099be3a1cff55879225881465f16c67d3
Parent: 2fb98e8414c42cb14698833aac640b143b9ade4f
Author: Tejun Heo <[EMAIL PROTECTED]>
AuthorDate: Tue Feb 19 11:36:55 2008 +0100
Committer: Jens Axboe <[EMAIL PROTECTED]>
CommitDate: Tue Feb 19 11:36:55 2008 +0100
block: clear drain buffer if draining for write command
Clear drain buffer before chaining if the command in question is a
write.
Signed-off-by: Tejun Heo <[EMAIL PROTECTED]>
Signed-off-by: Jens Axboe <[EMAIL PROTECTED]>
---
block/blk-merge.c | 3 +++
1 files changed, 3 insertions(+), 0 deletions(-)
diff --git a/block/blk-merge.c b/block/blk-merge.c
index bef1b4d..7506c4f 100644
--- a/block/blk-merge.c
+++ b/block/blk-merge.c
@@ -221,6 +221,9 @@ new_segment:
} /* segments in rq */
if (q->dma_drain_size && q->dma_drain_needed(rq)) {
+ if (rq->cmd_flags & REQ_RW)
+ memset(q->dma_drain_buffer, 0, q->dma_drain_size);
+
sg->page_link &= ~0x02;
sg = sg_next(sg);
sg_set_page(sg, virt_to_page(q->dma_drain_buffer),
-
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