Re: [PATCH] PM: hibernate: use correct mode for swsusp_close()

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>

diff --git a/kernel/power/hibernate.c b/kernel/power/hibernate.c
index 559acef3fddb..b0888e9224da 100644
--- a/kernel/power/hibernate.c
+++ b/kernel/power/hibernate.c

@@ -691,7 +691,7 @@ 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)
                error = hibernation_restore(flags & SF_PLATFORM_MODE);

@@ -981,7 +981,7 @@ static int software_resume(void)
        /* The snapshot device should not be opened while we're running */
        if (!hibernate_acquire()) {
                error = -EBUSY;
-               swsusp_close(FMODE_READ);
+               swsusp_close(FMODE_READ | FMODE_EXCL);
                goto Unlock;
        }

@@ -1016,7 +1016,7 @@ static int software_resume(void)
        pm_pr_dbg("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;
 }