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Subject14/19
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Some fields in the duplicated bio weren't being set up properly in
__split_page(). [Kevin Corry]
--- diff/drivers/md/dm.c 2002-12-16 09:41:21.000000000 +0000
+++ source/drivers/md/dm.c 2002-12-16 09:41:25.000000000 +0000
@@ -337,7 +337,7 @@
{
struct dm_target *ti = dm_table_find_target(ci->md->map, ci->sector);
struct bio *clone, *bio = ci->bio;
- struct bio_vec *bv = bio->bi_io_vec + (bio->bi_vcnt - 1);
+ struct bio_vec *bv = bio->bi_io_vec + ci->idx;

DMWARN("splitting page");

@@ -349,11 +349,13 @@

clone->bi_sector = ci->sector;
clone->bi_bdev = bio->bi_bdev;
- clone->bi_flags = bio->bi_flags | (1 << BIO_SEG_VALID);
clone->bi_rw = bio->bi_rw;
+ clone->bi_vcnt = 1;
clone->bi_size = len << SECTOR_SHIFT;
clone->bi_end_io = clone_endio;
clone->bi_private = ci->io;
+ clone->bi_io_vec->bv_offset = bv->bv_len - clone->bi_size;
+ clone->bi_io_vec->bv_len = clone->bi_size;

ci->sector += len;
ci->sector_count -= len;
-
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