1 files changed, 15 insertions, 2 deletions

diff --git a/drivers/scsi/sg.c b/drivers/scsi/sg.c
index 3d36270..661f9f2 100644
--- a/drivers/scsi/sg.c
+++ b/drivers/scsi/sg.c
@@ -217,6 +217,18 @@ static int sg_last_dev(void);
 #define SZ_SG_IOVEC sizeof(sg_iovec_t)
 #define SZ_SG_REQ_INFO sizeof(sg_req_info_t)
 
+static int sg_allow_access(struct file *filp, unsigned char *cmd)
+{
+	struct sg_fd *sfp = (struct sg_fd *)filp->private_data;
+	struct request_queue *q = sfp->parentdp->device->request_queue;
+
+	if (sfp->parentdp->device->type == TYPE_SCANNER)
+		return 0;
+
+	return blk_verify_command(&q->cmd_filter,
+				  cmd, filp->f_mode & FMODE_WRITE);
+}
+
 static int
 sg_open(struct inode *inode, struct file *filp)
 {
@@ -689,7 +701,7 @@ sg_new_write(Sg_fd *sfp, struct file *file, const char __user *buf,
 		sg_remove_request(sfp, srp);
 		return -EFAULT;
 	}
-	if (read_only && !blk_verify_command(file, cmnd)) {
+	if (read_only && sg_allow_access(file, cmnd)) {
 		sg_remove_request(sfp, srp);
 		return -EPERM;
 	}
@@ -793,6 +805,7 @@ sg_ioctl(struct inode *inode, struct file *filp,
 
 	if ((!(sfp = (Sg_fd *) filp->private_data)) || (!(sdp = sfp->parentdp)))
 		return -ENXIO;
+
 	SCSI_LOG_TIMEOUT(3, printk("sg_ioctl: %s, cmd=0x%x\n",
 				   sdp->disk->disk_name, (int) cmd_in));
 	read_only = (O_RDWR != (filp->f_flags & O_ACCMODE));
@@ -1061,7 +1074,7 @@ sg_ioctl(struct inode *inode, struct file *filp,
 
 			if (copy_from_user(&opcode, siocp->data, 1))
 				return -EFAULT;
-			if (!blk_verify_command(filp, &opcode))
+			if (sg_allow_access(filp, &opcode))
 				return -EPERM;
 		}
 		return sg_scsi_ioctl(filp, sdp->device->request_queue, NULL, p);