Patch "btrfs: fix incorrect error return ret being passed to mapping_set_error" has been added to the 4.9-stable tree

Patch "btrfs: fix incorrect error return ret being passed to mapping_set_error" has been added to the 4.9-stable tree

[gregkh]

This is a note to let you know that I've just added the patch titled

    btrfs: fix incorrect error return ret being passed to mapping_set_error

to the 4.9-stable tree which can be found at:
    http://www.kernel.org/git/?p=linux/kernel/git/stable/stable-queue.git;a=summary

The filename of the patch is:
     btrfs-fix-incorrect-error-return-ret-being-passed-to-mapping_set_error.patch
and it can be found in the queue-4.9 subdirectory.

If you, or anyone else, feels it should not be added to the stable tree,
please let <stable@vger.kernel.org> know about it.


>From foo@baz Mon Apr  9 17:09:24 CEST 2018
From: Colin Ian King <colin.king@canonical.com>
Date: Tue, 9 May 2017 18:14:01 +0100
Subject: btrfs: fix incorrect error return ret being passed to mapping_set_error

From: Colin Ian King <colin.king@canonical.com>


[ Upstream commit bff5baf8aa37a97293725a16c03f49872249c07e ]

The setting of return code ret should be based on the error code
passed into function end_extent_writepage and not on ret. Thanks
to Liu Bo for spotting this mistake in the original fix I submitted.

Detected by CoverityScan, CID#1414312 ("Logically dead code")

Fixes: 5dca6eea91653e ("Btrfs: mark mapping with error flag to report errors to userspace")
Signed-off-by: Colin Ian King <colin.king@canonical.com>
Reviewed-by: Liu Bo <bo.li.liu@oracle.com>
Signed-off-by: David Sterba <dsterba@suse.com>
Signed-off-by: Sasha Levin <alexander.levin@microsoft.com>
Signed-off-by: Greg Kroah-Hartman <gregkh@linuxfoundation.org>
---
 fs/btrfs/extent_io.c |    2 +-
 1 file changed, 1 insertion(+), 1 deletion(-)

--- a/fs/btrfs/extent_io.c
+++ b/fs/btrfs/extent_io.c
@@ -2453,7 +2453,7 @@ void end_extent_writepage(struct page *p
 	if (!uptodate) {
 		ClearPageUptodate(page);
 		SetPageError(page);
-		ret = ret < 0 ? ret : -EIO;
+		ret = err < 0 ? err : -EIO;
 		mapping_set_error(page->mapping, ret);
 	}
 }


Patches currently in stable-queue which might be from colin.king@canonical.com are

queue-4.9/wl1251-check-return-from-call-to-wl1251_acx_arp_ip_filter.patch
queue-4.9/netxen_nic-set-rcode-to-the-return-status-from-the-call-to-netxen_issue_cmd.patch
queue-4.9/btrfs-fix-incorrect-error-return-ret-being-passed-to-mapping_set_error.patch
queue-4.9/ath5k-fix-memory-leak-on-buf-on-failed-eeprom-read.patch