ieee1394: sbp2: fix probing of some DVD-ROM/RWs

Since commit 98e238cd42be6c0852da519303cf0182690f8d9f in Linux 2.6.19,
"ieee1394: sbp2: don't prefer MODE SENSE 10", some FireWire DVD-ROMs and
DVD-RWs were mistaken as CD-ROM because sr_mod now sent MODE SENSE 6.
The MMC command set includes only MODE SENSE 10.
http://bugzilla.kernel.org/show_bug.cgi?id=7800

This fix lets sbp2 switch scsi_device.use_10_for_rw on for MMC LUs.
This should rather be done in the command set driver sr_mod, not in the
sbp2 transport driver, and an according patch will follow for a next
Linux release.

Signed-off-by: Stefan Richter <stefanr@s5r6.in-berlin.de>

diff --git a/drivers/ieee1394/sbp2.c b/drivers/ieee1394/sbp2.c
index 2b5d7ab..4325aac 100644 (file)
--- a/drivers/ieee1394/sbp2.c
+++ b/drivers/ieee1394/sbp2.c
@@ -2020,6 +2020,8 @@ static int sbp2scsi_slave_configure(struct scsi_device *sdev)
        blk_queue_dma_alignment(sdev->request_queue, (512 - 1));
        sdev->use_10_for_rw = 1;
 
+       if (sdev->type == TYPE_ROM)
+               sdev->use_10_for_ms = 1;
        if (sdev->type == TYPE_DISK &&
            lu->workarounds & SBP2_WORKAROUND_MODE_SENSE_8)
                sdev->skip_ms_page_8 = 1;