grow: don't wait forever for critical section to pass.

If an array reshape completed within 1 second, then --grow will not
notice that it has finished and will keep waiting for the critical
section to pass.

So be more cautious in the test.

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

1 files changed, 8 insertions, 0 deletions

diff --git a/Grow.c b/Grow.c
index 14e48f56..fc809c63 100644
--- a/Grow.c
+++ b/Grow.c
@@ -815,6 +815,14 @@ int Grow_reshape(char *devname, int fd, int quiet, char *backup_file,
 			}
 			if (comp >= nstripe)
 				break;
+			if (comp == 0) {
+				/* Maybe it finished already */
+				char action[20];
+				if (sysfs_get_str(sra, NULL, "sync_action",
+						  action, 20) > 0 &&
+				    strncmp(action, "reshape", 7) != 0)
+					break;
+			}
 			sleep(1);
 		}