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[BLOCK] Clear sg entry before filling in blk_rq_map_sg() 

The memset() of the sg entry was originally removed, because it could
overwrite a chain pointer. But it's quite OK to memset() it when we know
it's a valid entry, since it can't contain a chain pointer.

Signed-off-by: Jens Axboe <jens.axboe@oracle.com>
This commit is contained in:
Jens Axboe 2007-10-17 13:02:33 +02:00
parent bdb02504f4
commit 60573b874b
1 changed files with 1 additions and 0 deletions
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block/ll_rw_blk.c
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@ -1352,6 +1352,7 @@ new_segment:
sg = next_sg;
next_sg = sg_next(sg);
memset(sg, 0, sizeof(*sg));
sg->page = bvec->bv_page;
sg->length = nbytes;
sg->offset = bvec->bv_offset;