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[PATCH] fix cgroup-inflicted breakage in block_dev.c
devcgroup_inode_permission() expects MAY_FOO, not FMODE_FOO; kindly keep your misdesign consistent if you positively have to inflict it on the kernel. Signed-off-by: Al Viro <viro@zeniv.linux.org.uk>
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@ -931,8 +931,16 @@ static int do_open(struct block_device *bdev, struct file *file, int for_part)
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struct gendisk *disk;
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int ret;
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int part;
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int perm = 0;
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ret = devcgroup_inode_permission(bdev->bd_inode, file->f_mode);
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if (file->f_mode & FMODE_READ)
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perm |= MAY_READ;
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if (file->f_mode & FMODE_WRITE)
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perm |= MAY_WRITE;
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/*
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* hooks: /n/, see "layering violations".
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*/
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ret = devcgroup_inode_permission(bdev->bd_inode, perm);
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if (ret != 0)
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return ret;
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