[SCSI] Mask capabilities for SCSI-1 CD drive

SCSI-1 CD drives can't do MRW or be opened for writing, so mask off
those capabilities.
Signed-off-by: NChuck Ebbert <76306.1226@compuserve.com>
Acked-by: NJens Axboe <axboe@suse.de>
Signed-off-by: NJames Bottomley <James.Bottomley@SteelEye.com>

drivers/scsi/sr.c

@@ -763,8 +763,9 @@ static void get_capabilities(struct scsi_cd *cd)
 		/* failed, drive doesn't have capabilities mode page */
 		cd->cdi.speed = 1;
 		cd->cdi.mask |= (CDC_CD_R | CDC_CD_RW | CDC_DVD_R |
-					 CDC_DVD | CDC_DVD_RAM |
-					 CDC_SELECT_DISC | CDC_SELECT_SPEED);
+				 CDC_DVD | CDC_DVD_RAM |
+				 CDC_SELECT_DISC | CDC_SELECT_SPEED |
+				 CDC_MRW | CDC_MRW_W | CDC_RAM);
 		kfree(buffer);
 		printk("%s: scsi-1 drive\n", cd->cdi.name);
 		return;