Revert "md: do not progress the resync process if the stripe was blocked"

This reverts commit df10cfbc4d7ab93260d997df754219d390d62a9d.

This patch was based on a misunderstanding and risks introducing a busy-wait loop.
So revert it.

Acked-by: Dan Williams <dan.j.williams@intel.com>
Signed-off-by: NeilBrown <neilb@suse.de>

1 files changed, 6 insertions, 13 deletions

diff --git a/drivers/md/raid5.c b/drivers/md/raid5.c
index 94829804ab7f..ec14ff5b508a 100644
--- a/drivers/md/raid5.c
+++ b/drivers/md/raid5.c
@@ -2896,7 +2896,7 @@ static void handle_stripe_expansion(raid5_conf_t *conf, struct stripe_head *sh,
  *
  */
 
-static bool handle_stripe5(struct stripe_head *sh)
+static void handle_stripe5(struct stripe_head *sh)
 {
         raid5_conf_t *conf = sh->raid_conf;
         int disks = sh->disks, i;
@@ -3167,11 +3167,9 @@ static bool handle_stripe5(struct stripe_head *sh)
         ops_run_io(sh, &s);
 
         return_io(return_bi);
-
-        return blocked_rdev == NULL;
 }
 
-static bool handle_stripe6(struct stripe_head *sh)
+static void handle_stripe6(struct stripe_head *sh)
 {
         raid5_conf_t *conf = sh->raid_conf;
         int disks = sh->disks;
@@ -3455,17 +3453,14 @@ static bool handle_stripe6(struct stripe_head *sh)
         ops_run_io(sh, &s);
 
         return_io(return_bi);
-
-        return blocked_rdev == NULL;
 }
 
-/* returns true if the stripe was handled */
-static bool handle_stripe(struct stripe_head *sh)
+static void handle_stripe(struct stripe_head *sh)
 {
         if (sh->raid_conf->level == 6)
-                return handle_stripe6(sh);
+                handle_stripe6(sh);
         else
-                return handle_stripe5(sh);
+                handle_stripe5(sh);
 }
 
 static void raid5_activate_delayed(raid5_conf_t *conf)
@@ -4277,9 +4272,7 @@ static inline sector_t sync_request(mddev_t *mddev, sector_t sector_nr, int *ski
         clear_bit(STRIPE_INSYNC, &sh->state);
         spin_unlock(&sh->lock);
 
-        /* wait for any blocked device to be handled */
-        while (unlikely(!handle_stripe(sh)))
-                ;
+        handle_stripe(sh);
         release_stripe(sh);
 
         return STRIPE_SECTORS;