[PATCH] sysfs: fix sysfs_setattr

o sysfs_dirent's s_mode field should also be updated in sysfs_setattr(), else
  there could be inconsistency in the two fields. s_mode is used while
  ->readdir so as not to bring in the inode to cache.
Signed-off-by: NManeesh Soni <maneesh@in.ibm.com>
Signed-off-by: NGreg Kroah-Hartman <gregkh@suse.de>
Signed-off-by: NLinus Torvalds <torvalds@osdl.org>

fs/sysfs/inode.c

@@ -85,7 +85,7 @@ int sysfs_setattr(struct dentry * dentry, struct iattr * iattr)
 
 		if (!in_group_p(inode->i_gid) && !capable(CAP_FSETID))
 			mode &= ~S_ISGID;
-		sd_iattr->ia_mode = mode;
+		sd_iattr->ia_mode = sd->s_mode = mode;
 	}
 
 	return error;