Problem:
XFS, JFS, etc. file systems of the fsys_table are not
detected by grub with grub-0.97-btrfs.patch applied.

BUG:
btrfs_mount() sets ERR_FSYS_MOUNT to the global variable
errnum if no btrfs metadata were found on a partition.
As the result all next calls of devread() (and, hence,
attempts to find metadata of other file systems) failed.

Solution:
Don't set ERR_FSYS_MOUNT, if btrfs metadata were found,
just return 0.

Signed-off-by: Edward Shishkin <edward@redhat.com>
---
 stage2/fsys_btrfs.c |    2 +-
 1 file changed, 1 insertion(+), 1 deletion(-)

--- grub-0.97.orig/stage2/fsys_btrfs.c
+++ grub-0.97/stage2/fsys_btrfs.c
@@ -638,7 +638,7 @@ int btrfs_mount(void)
 	if (ret) {
 		btrfs_msg("Drive %lu, partition %lu: no Btrfs metadata\n",
 			  current_drive, part_start);
-		goto error;
+		return 0;
 	}
 	ret = btrfs_uptodate_super_copy(BTRFS_FS_INFO);
 	if (ret)