dma-debug: debugfs_create_bool() takes a u32 pointer
authorDan Carpenter <dan.carpenter@oracle.com>
Wed, 27 Jun 2012 09:08:55 +0000 (12:08 +0300)
committerJoerg Roedel <joerg.roedel@amd.com>
Mon, 2 Jul 2012 10:11:40 +0000 (12:11 +0200)
Even though it has "bool" in the name, you have pass a u32 pointer to
debugfs_create_bool().  Otherwise you get memory corruption in
write_file_bool().  Fortunately in this case the corruption happens in
an alignment hole between variables so it doesn't cause any problems.

Signed-off-by: Dan Carpenter <dan.carpenter@oracle.com>
Signed-off-by: Joerg Roedel <joerg.roedel@amd.com>
lib/dma-debug.c

index 518aea714d21d9dea1c7d52b0cf6878482ca5d82..66ce414891330964aacb48dee8079138034cad3d 100644 (file)
@@ -78,7 +78,7 @@ static LIST_HEAD(free_entries);
 static DEFINE_SPINLOCK(free_entries_lock);
 
 /* Global disable flag - will be set in case of an error */
-static bool global_disable __read_mostly;
+static u32 global_disable __read_mostly;
 
 /* Global error count */
 static u32 error_count;
@@ -657,7 +657,7 @@ static int dma_debug_fs_init(void)
 
        global_disable_dent = debugfs_create_bool("disabled", 0444,
                        dma_debug_dent,
-                       (u32 *)&global_disable);
+                       &global_disable);
        if (!global_disable_dent)
                goto out_err;