summaryrefslogtreecommitdiffstats
path: root/fs
diff options
context:
space:
mode:
Diffstat (limited to 'fs')
-rw-r--r--fs/super.c9
1 files changed, 9 insertions, 0 deletions
diff --git a/fs/super.c b/fs/super.c
index 938119ab8dc..3479ca6f005 100644
--- a/fs/super.c
+++ b/fs/super.c
@@ -773,7 +773,16 @@ int get_sb_bdev(struct file_system_type *fs_type,
goto error_bdev;
}
+ /*
+ * s_umount nests inside bd_mutex during
+ * __invalidate_device(). close_bdev_exclusive()
+ * acquires bd_mutex and can't be called under
+ * s_umount. Drop s_umount temporarily. This is safe
+ * as we're holding an active reference.
+ */
+ up_write(&s->s_umount);
close_bdev_exclusive(bdev, mode);
+ down_write(&s->s_umount);
} else {
char b[BDEVNAME_SIZE];