libata: add @timeout to ata_exec_internal[_sg]()

Add @timeout argument to ata_exec_internal[_sg]().  If 0, default
timeout ata_probe_timeout is used.

Signed-off-by: Tejun Heo <htejun@gmail.com>
Signed-off-by: Jeff Garzik <jeff@garzik.org>
diff --git a/drivers/ata/libata-eh.c b/drivers/ata/libata-eh.c
index 8aa6140..c0e9a42 100644
--- a/drivers/ata/libata-eh.c
+++ b/drivers/ata/libata-eh.c
@@ -1249,7 +1249,7 @@
 	tf.protocol = ATA_PROT_PIO;
 
 	err_mask = ata_exec_internal(dev, &tf, NULL, DMA_FROM_DEVICE,
-				     buf, sectors * ATA_SECT_SIZE);
+				     buf, sectors * ATA_SECT_SIZE, 0);
 
 	DPRINTK("EXIT, err_mask=%x\n", err_mask);
 	return err_mask;
@@ -1363,7 +1363,7 @@
 	}
 
 	return ata_exec_internal(dev, &tf, cdb, DMA_FROM_DEVICE,
-				 sense_buf, SCSI_SENSE_BUFFERSIZE);
+				 sense_buf, SCSI_SENSE_BUFFERSIZE, 0);
 }
 
 /**