btrfs: fix EIO misuse to report missing degraded option

EIO is only for the IO failure to the device, avoid it. Use ENOENT as
that's the closest error code describing what happened.

Signed-off-by: Anand Jain <anand.jain@oracle.com>
Reviewed-by: David Sterba <dsterba@suse.com>
[ update changelog ]
Signed-off-by: David Sterba <dsterba@suse.com>

diff --git a/fs/btrfs/volumes.c b/fs/btrfs/volumes.c
index 23b628cfad198e3d8141aa0959c45ec1a582f171..3896dfd6c8e04784aa1f7a75429dd41e456091aa 100644 (file)
--- a/fs/btrfs/volumes.c
+++ b/fs/btrfs/volumes.c
@@ -6437,7 +6437,7 @@ static int read_one_chunk(struct btrfs_fs_info *fs_info, struct btrfs_key *key,
                    !btrfs_test_opt(fs_info, DEGRADED)) {
                        free_extent_map(em);
                        btrfs_report_missing_device(fs_info, devid, uuid);
-                       return -EIO;
+                       return -ENOENT;
                }
                if (!map->stripes[i].dev) {
                        map->stripes[i].dev =
@@ -6570,7 +6570,7 @@ static int read_one_dev(struct btrfs_fs_info *fs_info,
        if (!device) {
                if (!btrfs_test_opt(fs_info, DEGRADED)) {
                        btrfs_report_missing_device(fs_info, devid, dev_uuid);
-                       return -EIO;
+                       return -ENOENT;
                }
 
                device = add_missing_dev(fs_devices, devid, dev_uuid);
@@ -6585,7 +6585,7 @@ static int read_one_dev(struct btrfs_fs_info *fs_info,
                if (!device->bdev) {
                        btrfs_report_missing_device(fs_info, devid, dev_uuid);
                        if (!btrfs_test_opt(fs_info, DEGRADED))
-                               return -EIO;
+                               return -ENOENT;
                }
 
                if(!device->bdev && !device->missing) {