md/raid1: minor bio initialisation improvements.

When performing a resync we pre-allocate some bios and repeatedly use
them.  This requires us to re-initialise them each time.
One field (bi_comp_cpu) and some flags weren't being initiaised
reliably.

Signed-off-by: NeilBrown <neilb@suse.de>

diff --git a/drivers/md/raid1.c b/drivers/md/raid1.c
index fba4d2f..0b830bb 100644 (file)
--- a/drivers/md/raid1.c
+++ b/drivers/md/raid1.c
@@ -1839,7 +1839,9 @@ static sector_t sync_request(mddev_t *mddev, sector_t sector_nr, int *skipped, i
 
                /* take from bio_init */
                bio->bi_next = NULL;
+               bio->bi_flags &= ~(BIO_POOL_MASK-1);
                bio->bi_flags |= 1 << BIO_UPTODATE;
+               bio->bi_comp_cpu = -1;
                bio->bi_rw = READ;
                bio->bi_vcnt = 0;
                bio->bi_idx = 0;