Prevent gcc -Werror=maybe-uninitialized warnings in spa_wait_common()

This commit fixes the following build failure detected on Debian9
(GCC 6.3.0):

     CC [M]  module/zfs/spa.o
   module/zfs/spa.c: In function ‘spa_wait_common.part.31’:
   module/zfs/spa.c:9468:6: error: ‘in_progress’ may be used uninitialized in this function [-Werror=maybe-uninitialized]
      if (!in_progress || spa->spa_waiters_cancel || error)
         ^
   cc1: all warnings being treated as errors

Reviewed-by: Chris Dunlop <chris@onthe.net.au>
Reviewed-by: Brian Behlendorf <behlendorf1@llnl.gov>
Reviewed-by: John Gallagher <john.gallagher@delphix.com>
Signed-off-by: loli10K <ezomori.nozomu@gmail.com>
Closes #9326

diff --git a/module/zfs/spa.c b/module/zfs/spa.c
index 0f1a2a9eb38cf8d02088954b95322d6e651797b1..7e5c474eb2e29006326ded49b932c38d1afbe44d 100644 (file)
--- a/module/zfs/spa.c
+++ b/module/zfs/spa.c
@@ -9465,7 +9465,7 @@ spa_wait_common(const char *pool, zpool_wait_activity_t activity,
                error = spa_activity_in_progress(spa, activity, use_tag, tag,
                    &in_progress);
 
-               if (!in_progress || spa->spa_waiters_cancel || error)
+               if (error || !in_progress || spa->spa_waiters_cancel)
                        break;
 
                *waited = B_TRUE;