firewire: fw-sbp2: implement max sectors limit for some old bridges

This currently only affects one bridge in the hardwired blacklist.
I don't own one of those, hence haven't tested it.

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

diff --git a/drivers/firewire/fw-sbp2.c b/drivers/firewire/fw-sbp2.c
index 851c2da..49f7fd5 100644 (file)
--- a/drivers/firewire/fw-sbp2.c
+++ b/drivers/firewire/fw-sbp2.c
@@ -34,6 +34,7 @@
 #include <linux/device.h>
 #include <linux/scatterlist.h>
 #include <linux/dma-mapping.h>
+#include <linux/blkdev.h>
 #include <linux/timer.h>
 
 #include <scsi/scsi.h>
@@ -1080,7 +1081,8 @@ static int sbp2_scsi_slave_configure(struct scsi_device *sdev)
                fw_notify("setting fix_capacity for %s\n", unit->device.bus_id);
                sdev->fix_capacity = 1;
        }
-
+       if (sd->workarounds & SBP2_WORKAROUND_128K_MAX_TRANS)
+               blk_queue_max_sectors(sdev->request_queue, 128 * 1024 / 512);
        return 0;
 }