3 files changed, 19 insertions, 2 deletions

diff --git a/drivers/scsi/sd.c b/drivers/scsi/sd.c
index e5e7d7856454..2a2bc89aba83 100644
--- a/drivers/scsi/sd.c
+++ b/drivers/scsi/sd.c
@@ -1875,6 +1875,7 @@ static int sd_probe(struct device *dev)
 
         dev_set_drvdata(dev, sdkp);
         add_disk(gd);
+        blk_register_filter(gd);
         sd_dif_config_host(sdkp);
 
         sd_printk(KERN_NOTICE, sdkp, "Attached SCSI %sdisk\n",
@@ -1908,6 +1909,7 @@ static int sd_remove(struct device *dev)
         struct scsi_disk *sdkp = dev_get_drvdata(dev);
 
         device_del(&sdkp->dev);
+        blk_unregister_filter(sdkp->disk);
         del_gendisk(sdkp->disk);
         sd_shutdown(dev);
 
diff --git a/drivers/scsi/sg.c b/drivers/scsi/sg.c
index 3d36270a8b4d..661f9f21650a 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);
diff --git a/drivers/scsi/sr.c b/drivers/scsi/sr.c
index 27f5bfd1def3..3292965bfd84 100644
--- a/drivers/scsi/sr.c
+++ b/drivers/scsi/sr.c
@@ -656,6 +656,7 @@ static int sr_probe(struct device *dev)
         dev_set_drvdata(dev, cd);
         disk->flags |= GENHD_FL_REMOVABLE;
         add_disk(disk);
+        blk_register_filter(disk);
 
         sdev_printk(KERN_DEBUG, sdev,
                     "Attached scsi CD-ROM %s\n", cd->cdi.name);
@@ -894,6 +895,7 @@ static int sr_remove(struct device *dev)
 {
         struct scsi_cd *cd = dev_get_drvdata(dev);
 
+        blk_unregister_filter(cd->disk);
         del_gendisk(cd->disk);
 
         mutex_lock(&sr_ref_mutex);