scsi: cdrom: Remove the call to scsi_cmd_blk_ioctl() from cdrom_ioctl()

Only the sr driver can handle SCSI passthrough requests, so move the call
to scsi_cmd_blk_ioctl() there.

Link: https://lore.kernel.org/r/[e-mail]
Signed-off-by: Christoph Hellwig <[e-mail]>
Signed-off-by: Martin K. Petersen <[e-mail]>

drivers/block/Kconfig

···
 
 config CDROM
 	tristate
-	select BLK_SCSI_REQUEST
 
 config GDROM
 	tristate "SEGA Dreamcast GD-ROM drive"

drivers/block/paride/Kconfig

···
 	tristate "Parallel port ATAPI CD-ROMs"
 	depends on PARIDE
 	select CDROM
-	select BLK_SCSI_REQUEST # only for the generic cdrom code
 	help
 	  This option enables the high-level driver for ATAPI CD-ROM devices
 	  connected through a parallel port. If you chose to build PARIDE

drivers/cdrom/cdrom.c

···
 	void __user *argp = (void __user *)arg;
 	int ret;
 
-	/*
-	 * Try the generic SCSI command ioctl's first.
-	 */
-	ret = scsi_cmd_blk_ioctl(bdev, mode, cmd, argp);
-	if (ret != -ENOTTY)
-		return ret;
-
 	switch (cmd) {
 	case CDROMMULTISESSION:
 		return cdrom_ioctl_multisession(cdi, argp);

drivers/scsi/sr.c

···
 	case SCSI_IOCTL_GET_BUS_NUMBER:
 		break;
 	default:
+		ret = scsi_cmd_blk_ioctl(bdev, mode, cmd, argp);
+		if (ret != -ENOTTY)
+			goto put;
 		ret = cdrom_ioctl(&cd->cdi, bdev, mode, cmd, arg);
 		if (ret != -ENOSYS)
 			goto put;