[XFS] kill di_mode checks after xfs_iget

Unless XFS_IGET_CREATE is passed xfs_iget will return ENOENT if it
encounters an inode with di_mode == 0. Remove the duplicated checks in the
callers.

(the log recovery case is not touched for now)

SGI-PV: 976035
SGI-Modid: xfs-linux-melb:xfs-kern:30898a

Signed-off-by: Christoph Hellwig <hch@infradead.org>
Signed-off-by: Lachlan McIlroy <lachlan@sgi.com>
diff --git a/fs/xfs/linux-2.6/xfs_export.c b/fs/xfs/linux-2.6/xfs_export.c
index 265f016..c672b32 100644
--- a/fs/xfs/linux-2.6/xfs_export.c
+++ b/fs/xfs/linux-2.6/xfs_export.c
@@ -133,7 +133,7 @@
 	if (!ip)
 		return ERR_PTR(-EIO);
 
-	if (!ip->i_d.di_mode || ip->i_d.di_gen != generation) {
+	if (ip->i_d.di_gen != generation) {
 		xfs_iput_new(ip, XFS_ILOCK_SHARED);
 		return ERR_PTR(-ENOENT);
 	}
diff --git a/fs/xfs/linux-2.6/xfs_ioctl.c b/fs/xfs/linux-2.6/xfs_ioctl.c
index 4ddb86b..98e8780 100644
--- a/fs/xfs/linux-2.6/xfs_ioctl.c
+++ b/fs/xfs/linux-2.6/xfs_ioctl.c
@@ -238,7 +238,7 @@
 		return error;
 	if (ip == NULL)
 		return XFS_ERROR(EIO);
-	if (ip->i_d.di_mode == 0 || ip->i_d.di_gen != igen) {
+	if (ip->i_d.di_gen != igen) {
 		xfs_iput_new(ip, XFS_ILOCK_SHARED);
 		return XFS_ERROR(ENOENT);
 	}