[SCSI] Consolidate REQ_BLOCK_PC handling path (fix ipod panic)

This follows on from Jens' patch and consolidates all of the ULD
separate handlers for REQ_BLOCK_PC into a single call which has his
fix for our direction bug.

Signed-off-by: James Bottomley <James.Bottomley@SteelEye.com>

1 files changed, 21 insertions, 12 deletions

diff --git a/drivers/scsi/scsi_lib.c b/drivers/scsi/scsi_lib.c
index 097888721ec..9be5769d44a 100644
--- a/drivers/scsi/scsi_lib.c
+++ b/drivers/scsi/scsi_lib.c
@@ -1078,6 +1078,26 @@ static void scsi_generic_done(struct scsi_cmnd *cmd)
 	scsi_io_completion(cmd, cmd->result == 0 ? cmd->bufflen : 0, 0);
 }
 
+void scsi_setup_blk_pc_cmnd(struct scsi_cmnd *cmd, int retries)
+{
+	struct request *req = cmd->request;
+
+	BUG_ON(sizeof(req->cmd) > sizeof(cmd->cmnd));
+	memcpy(cmd->cmnd, req->cmd, sizeof(cmd->cmnd));
+	cmd->cmd_len = req->cmd_len;
+	if (!req->data_len)
+		cmd->sc_data_direction = DMA_NONE;
+	else if (rq_data_dir(req) == WRITE)
+		cmd->sc_data_direction = DMA_TO_DEVICE;
+	else
+		cmd->sc_data_direction = DMA_FROM_DEVICE;
+	
+	cmd->transfersize = req->data_len;
+	cmd->allowed = retries;
+	cmd->timeout_per_command = req->timeout;
+}
+EXPORT_SYMBOL_GPL(scsi_setup_blk_pc_cmnd);
+
 static int scsi_prep_fn(struct request_queue *q, struct request *req)
 {
 	struct scsi_device *sdev = q->queuedata;
@@ -1213,18 +1233,7 @@ static int scsi_prep_fn(struct request_queue *q, struct request *req)
 				goto kill;
 			}
 		} else {
-			memcpy(cmd->cmnd, req->cmd, sizeof(cmd->cmnd));
-			cmd->cmd_len = req->cmd_len;
-			if (!req->data_len)
-				cmd->sc_data_direction = DMA_NONE;
-			else if (rq_data_dir(req) == WRITE)
-				cmd->sc_data_direction = DMA_TO_DEVICE;
-			else
-				cmd->sc_data_direction = DMA_FROM_DEVICE;
-			
-			cmd->transfersize = req->data_len;
-			cmd->allowed = 3;
-			cmd->timeout_per_command = req->timeout;
+			scsi_setup_blk_pc_cmnd(cmd, 3);
 			cmd->done = scsi_generic_done;
 		}
 	}