mdmon: don't wait for O_EXCL when shutting down.

If mdmon is shutting down because there are no devices
left to look at, then don't wait 5 seconds for an O_EXCL open,
and that can block progress of --grow.

Only wait for O_EXCL if we received a signal.

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

1 files changed, 7 insertions, 2 deletions

diff --git a/util.c b/util.c
index cc6ccb4d..8e1b7371 100644
--- a/util.c
+++ b/util.c
@@ -998,12 +998,17 @@ int dev_open(char *dev, int flags)
 	return fd;
 }
 
-int open_dev(int devnum)
+int open_dev_flags(int devnum, int flags)
 {
 	char buf[20];
 
 	sprintf(buf, "%d:%d", dev2major(devnum), dev2minor(devnum));
-	return dev_open(buf, O_RDONLY);
+	return dev_open(buf, flags);
+}
+
+int open_dev(int devnum)
+{
+	return open_dev_flags(devnum, O_RDONLY);
 }
 
 int open_dev_excl(int devnum)