md: use bio_kmalloc rather than bio_alloc when failure is acceptable.

bio_alloc can never fail (as it uses a mempool) but an block
indefinitely, especially if the caller is holding a reference to a
previously allocated bio.

So these to places which both handle failure and hold multiple bios
should not use bio_alloc, they should use bio_kmalloc.

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

1 files changed, 1 insertions, 1 deletions

diff --git a/drivers/md/raid10.c b/drivers/md/raid10.c
index 8f5543a62416..6709cb255200 100644
--- a/drivers/md/raid10.c
+++ b/drivers/md/raid10.c
@@ -120,7 +120,7 @@ static void * r10buf_pool_alloc(gfp_t gfp_flags, void *data)
          * Allocate bios.
          */
         for (j = nalloc ; j-- ; ) {
-                bio = bio_alloc(gfp_flags, RESYNC_PAGES);
+                bio = bio_kmalloc(gfp_flags, RESYNC_PAGES);
                 if (!bio)
                         goto out_free_bio;
                 r10_bio->devs[j].bio = bio;