ide-tape: remove superfluous error message from idetape_pc_intr()

[pandora-kernel.git] / fs / block_dev.c

diff --git a/fs/block_dev.c b/fs/block_dev.c
index 7d822fa..10d8a0a 100644 (file)
--- a/fs/block_dev.c
+++ b/fs/block_dev.c
@@ -12,6 +12,7 @@
 #include <linux/kmod.h>
 #include <linux/major.h>
 #include <linux/smp_lock.h>
+#include <linux/device_cgroup.h>
 #include <linux/highmem.h>
 #include <linux/blkdev.h>
 #include <linux/module.h>
@@ -928,9 +929,22 @@ static int do_open(struct block_device *bdev, struct file *file, int for_part)
 {
        struct module *owner = NULL;
        struct gendisk *disk;
-       int ret = -ENXIO;
+       int ret;
        int part;
+       int perm = 0;
+
+       if (file->f_mode & FMODE_READ)
+               perm |= MAY_READ;
+       if (file->f_mode & FMODE_WRITE)
+               perm |= MAY_WRITE;
+       /*
+        * hooks: /n/, see "layering violations".
+        */
+       ret = devcgroup_inode_permission(bdev->bd_inode, perm);
+       if (ret != 0)
+               return ret;
 
+       ret = -ENXIO;
        file->f_mapping = bdev->bd_inode->i_mapping;
        lock_kernel();
        disk = get_gendisk(bdev->bd_dev, &part);