[PATCH] USB: Adapt microtek driver to new scsi features

the scsi layer now uses very short sg lists. This breaks the microtek
driver. Here is a patch fixes this and some other issues.

Signed-off-by: Oliver Neukum <oliver@neukum.name>
Signed-off-by: Greg Kroah-Hartman <gregkh@suse.de>
Signed-off-by: Linus Torvalds <torvalds@osdl.org>

2 files changed, 28 insertions, 9 deletions

diff --git a/drivers/usb/image/microtek.c b/drivers/usb/image/microtek.c
index 61a2604cce4f..950543aa5ac7 100644
--- a/drivers/usb/image/microtek.c
+++ b/drivers/usb/image/microtek.c
@@ -327,6 +327,18 @@ static inline void mts_urb_abort(struct mts_desc* desc) {
         usb_kill_urb( desc->urb );
 }
 
+static int mts_slave_alloc (struct scsi_device *s)
+{
+        s->inquiry_len = 0x24;
+        return 0;
+}
+
+static int mts_slave_configure (struct scsi_device *s)
+{
+        blk_queue_dma_alignment(s->request_queue, (512 - 1));
+        return 0;
+}
+
 static int mts_scsi_abort (Scsi_Cmnd *srb)
 {
         struct mts_desc* desc = (struct mts_desc*)(srb->device->host->hostdata[0]);
@@ -411,7 +423,7 @@ static void mts_transfer_done( struct urb *transfer, struct pt_regs *regs )
         MTS_INT_INIT();
 
         context->srb->result &= MTS_SCSI_ERR_MASK;
-        context->srb->result |= (unsigned)context->status<<1;
+        context->srb->result |= (unsigned)(*context->scsi_status)<<1;
 
         mts_transfer_cleanup(transfer);
 
@@ -427,7 +439,7 @@ static void mts_get_status( struct urb *transfer )
         mts_int_submit_urb(transfer,
                            usb_rcvbulkpipe(context->instance->usb_dev,
                                            context->instance->ep_response),
-                           &context->status,
+                           context->scsi_status,
                            1,
                            mts_transfer_done );
 }
@@ -481,7 +493,7 @@ static void mts_command_done( struct urb *transfer, struct pt_regs *regs )
                                            context->data_pipe,
                                            context->data,
                                            context->data_length,
-                                           context->srb->use_sg ? mts_do_sg : mts_data_done);
+                                           context->srb->use_sg > 1 ? mts_do_sg : mts_data_done);
                 } else {
                         mts_get_status(transfer);
                 }
@@ -627,7 +639,6 @@ int mts_scsi_queuecommand( Scsi_Cmnd *srb, mts_scsi_cmnd_callback callback )
                         callback(srb);
 
         }
-
 out:
         return err;
 }
@@ -645,6 +656,9 @@ static struct scsi_host_template mts_scsi_host_template = {
         .cmd_per_lun =          1,
         .use_clustering =       1,
         .emulated =             1,
+        .slave_alloc =          mts_slave_alloc,
+        .slave_configure =      mts_slave_configure,
+        .max_sectors=           256, /* 128 K */
 };
 
 struct vendor_product
@@ -771,8 +785,8 @@ static int mts_usb_probe(struct usb_interface *intf,
                 MTS_WARNING( "couldn't find an output bulk endpoint. Bailing out.\n" );
                 return -ENODEV;
         }
-        
-        
+
+
         new_desc = kzalloc(sizeof(struct mts_desc), GFP_KERNEL);
         if (!new_desc)
                 goto out;
@@ -781,6 +795,10 @@ static int mts_usb_probe(struct usb_interface *intf,
         if (!new_desc->urb)
                 goto out_kfree;
 
+        new_desc->context.scsi_status = kmalloc(1, GFP_KERNEL);
+        if (!new_desc->context.scsi_status)
+                goto out_kfree2;
+
         new_desc->usb_dev = dev;
         new_desc->usb_intf = intf;
         init_MUTEX(&new_desc->lock);
@@ -817,6 +835,8 @@ static int mts_usb_probe(struct usb_interface *intf,
         usb_set_intfdata(intf, new_desc);
         return 0;
 
+ out_kfree2:
+        kfree(new_desc->context.scsi_status);
  out_free_urb:
         usb_free_urb(new_desc->urb);
  out_kfree:
@@ -836,6 +856,7 @@ static void mts_usb_disconnect (struct usb_interface *intf)
 
         scsi_host_put(desc->host);
         usb_free_urb(desc->urb);
+        kfree(desc->context.scsi_status);
         kfree(desc);
 }
 
@@ -856,5 +877,3 @@ module_exit(microtek_drv_exit);
 MODULE_AUTHOR( DRIVER_AUTHOR );
 MODULE_DESCRIPTION( DRIVER_DESC );
 MODULE_LICENSE("GPL");
-
-
diff --git a/drivers/usb/image/microtek.h b/drivers/usb/image/microtek.h
index 3271deb8c001..926d4bdc6746 100644
--- a/drivers/usb/image/microtek.h
+++ b/drivers/usb/image/microtek.h
@@ -22,7 +22,7 @@ struct mts_transfer_context
         int data_pipe;
         int fragment;
 
-        u8 status; /* status returned from ep_response after command completion */
+        u8 *scsi_status; /* status returned from ep_response after command completion */
 };