[PATCH 4.9 20/62] PM: hibernate: use correct mode for swsusp_close()

From: Thomas Zeitlhofer <redacted>

[ Upstream commit cefcf24b4d351daf70ecd945324e200d3736821e ]

Commit 39fbef4b0f77 ("PM: hibernate: Get block device exclusively in
swsusp_check()") changed the opening mode of the block device to
(FMODE_READ | FMODE_EXCL).

In the corresponding calls to swsusp_close(), the mode is still just
FMODE_READ which triggers the warning in blkdev_flush_mapping() on
resume from hibernate.

So, use the mode (FMODE_READ | FMODE_EXCL) also when closing the
device.

Fixes: 39fbef4b0f77 ("PM: hibernate: Get block device exclusively in swsusp_check()")
Signed-off-by: Thomas Zeitlhofer <redacted>
Signed-off-by: Rafael J. Wysocki <redacted>
Signed-off-by: Sasha Levin <sashal@kernel.org>
---
 kernel/power/hibernate.c | 6 +++---
 1 file changed, 3 insertions(+), 3 deletions(-)

diff --git a/kernel/power/hibernate.c b/kernel/power/hibernate.c
index 7b393faf930f8..e938fd8db056b 100644
--- a/kernel/power/hibernate.c
+++ b/kernel/power/hibernate.c

@@ -672,7 +672,7 @@ static int load_image_and_restore(void)
 		goto Unlock;
 
 	error = swsusp_read(&flags);
-	swsusp_close(FMODE_READ);
+	swsusp_close(FMODE_READ | FMODE_EXCL);
 	if (!error)
 		hibernation_restore(flags & SF_PLATFORM_MODE);
 

@@ -866,7 +866,7 @@ static int software_resume(void)
 	/* The snapshot device should not be opened while we're running */
 	if (!atomic_add_unless(&snapshot_device_available, -1, 0)) {
 		error = -EBUSY;
-		swsusp_close(FMODE_READ);
+		swsusp_close(FMODE_READ | FMODE_EXCL);
 		goto Unlock;
 	}
 

@@ -900,7 +900,7 @@ static int software_resume(void)
 	pr_debug("PM: Hibernation image not present or could not be loaded.\n");
 	return error;
  Close_Finish:
-	swsusp_close(FMODE_READ);
+	swsusp_close(FMODE_READ | FMODE_EXCL);
 	goto Finish;
 }
 

-- 
2.33.0