bcache: correct flash only vols (check all uuids)

Commit 2831231d4c3f ("bcache: reduce cache_set devices iteration by
devices_max_used") adds c->devices_max_used to reduce iteration of
c->uuids elements, this value is updated in bcache_device_attach().

But for flash only volume, when calling flash_devs_run(), the function
bcache_device_attach() is not called yet and c->devices_max_used is not
updated. The unexpected result is, the flash only volume won't be run
by flash_devs_run().

This patch fixes the issue by iterate all c->uuids elements in
flash_devs_run(). c->devices_max_used will be updated properly when
bcache_device_attach() gets called.

[mlyle: commit subject edited for character limit]

Fixes: 2831231d4c3f ("bcache: reduce cache_set devices iteration by devices_max_used")
Reported-by: Tang Junhui <tang.junhui@zte.com.cn>
Signed-off-by: Coly Li <colyli@suse.de>
Reviewed-by: Michael Lyle <mlyle@lyle.org>
Signed-off-by: Jens Axboe <axboe@kernel.dk>

diff --git a/drivers/md/bcache/super.c b/drivers/md/bcache/super.c
index 312895788036705cb0426d1af5b5662a4797faf3..4d1d8dfb2d2a4d1de7d6ee59e2b8d802a68827e5 100644 (file)
--- a/drivers/md/bcache/super.c
+++ b/drivers/md/bcache/super.c
@@ -1274,7 +1274,7 @@ static int flash_devs_run(struct cache_set *c)
        struct uuid_entry *u;
 
        for (u = c->uuids;
-            u < c->uuids + c->devices_max_used && !ret;
+            u < c->uuids + c->nr_uuids && !ret;
             u++)
                if (UUID_FLASH_ONLY(u))
                        ret = flash_dev_run(c, u);