Merge branch 'x86-cleanups-for-linus' of git://git.kernel.org/pub/scm/linux/kernel...

[karo-tx-linux.git] / drivers / md / raid5.c

diff --git a/drivers/md/raid5.c b/drivers/md/raid5.c
index 15ef2c641b2b93e96004d073463fdcfaaaaceab4..45933c1606972c007fee4393b82c05db7b24f7ec 100644 (file)
--- a/drivers/md/raid5.c
+++ b/drivers/md/raid5.c
@@ -2271,8 +2271,7 @@ static void shrink_stripes(struct r5conf *conf)
               drop_one_stripe(conf))
                ;
 
-       if (conf->slab_cache)
-               kmem_cache_destroy(conf->slab_cache);
+       kmem_cache_destroy(conf->slab_cache);
        conf->slab_cache = NULL;
 }
 
@@ -3150,6 +3149,8 @@ handle_failed_stripe(struct r5conf *conf, struct stripe_head *sh,
                        spin_unlock_irq(&sh->stripe_lock);
                        if (test_and_clear_bit(R5_Overlap, &sh->dev[i].flags))
                                wake_up(&conf->wait_for_overlap);
+                       if (bi)
+                               s->to_read--;
                        while (bi && bi->bi_iter.bi_sector <
                               sh->dev[i].sector + STRIPE_SECTORS) {
                                struct bio *nextbi =
@@ -3169,6 +3170,8 @@ handle_failed_stripe(struct r5conf *conf, struct stripe_head *sh,
                 */
                clear_bit(R5_LOCKED, &sh->dev[i].flags);
        }
+       s->to_write = 0;
+       s->written = 0;
 
        if (test_and_clear_bit(STRIPE_FULL_WRITE, &sh->state))
                if (atomic_dec_and_test(&conf->pending_full_writes))
@@ -3300,7 +3303,7 @@ static int need_this_block(struct stripe_head *sh, struct stripe_head_state *s,
                 */
                return 0;
 
-       for (i = 0; i < s->failed; i++) {
+       for (i = 0; i < s->failed && i < 2; i++) {
                if (fdev[i]->towrite &&
                    !test_bit(R5_UPTODATE, &fdev[i]->flags) &&
                    !test_bit(R5_OVERWRITE, &fdev[i]->flags))
@@ -3324,7 +3327,7 @@ static int need_this_block(struct stripe_head *sh, struct stripe_head_state *s,
            sh->sector < sh->raid_conf->mddev->recovery_cp)
                /* reconstruct-write isn't being forced */
                return 0;
-       for (i = 0; i < s->failed; i++) {
+       for (i = 0; i < s->failed && i < 2; i++) {
                if (s->failed_num[i] != sh->pd_idx &&
                    s->failed_num[i] != sh->qd_idx &&
                    !test_bit(R5_UPTODATE, &fdev[i]->flags) &&
@@ -3496,6 +3499,7 @@ returnbi:
                }
        if (!discard_pending &&
            test_bit(R5_Discard, &sh->dev[sh->pd_idx].flags)) {
+               int hash;
                clear_bit(R5_Discard, &sh->dev[sh->pd_idx].flags);
                clear_bit(R5_UPTODATE, &sh->dev[sh->pd_idx].flags);
                if (sh->qd_idx >= 0) {
@@ -3509,16 +3513,17 @@ returnbi:
                 * no updated data, so remove it from hash list and the stripe
                 * will be reinitialized
                 */
-               spin_lock_irq(&conf->device_lock);
 unhash:
+               hash = sh->hash_lock_index;
+               spin_lock_irq(conf->hash_locks + hash);
                remove_hash(sh);
+               spin_unlock_irq(conf->hash_locks + hash);
                if (head_sh->batch_head) {
                        sh = list_first_entry(&sh->batch_list,
                                              struct stripe_head, batch_list);
                        if (sh != head_sh)
                                        goto unhash;
                }
-               spin_unlock_irq(&conf->device_lock);
                sh = head_sh;
 
                if (test_bit(STRIPE_SYNC_REQUESTED, &sh->state))