can: etas_es58x: remove useless calls to usb_fill_bulk_urb()

Aside of urb->transfer_buffer_length and urb->context which might
change in the TX path, all the other URB parameters remains constant
during runtime. So, there is no reasons to call usb_fill_bulk_urb()
each time before submitting an URB.

Make sure to initialize all the fields of the URB at allocation
time. For the TX branch, replace the call usb_fill_bulk_urb() by an
assignment of urb->context. urb->urb->transfer_buffer_length is
already set by the caller functions, no need to set it again. For the
RX branch, because all parameters are unchanged, simply remove the
call to usb_fill_bulk_urb().

Signed-off-by: Vincent Mailhol <mailhol.vincent@wanadoo.fr>
Link: https://lore.kernel.org/all/20220729080902.25839-1-mailhol.vincent@wanadoo.fr
Signed-off-by: Marc Kleine-Budde <mkl@pengutronix.de>

diff --git a/drivers/net/can/usb/etas_es58x/es58x_core.c b/drivers/net/can/usb/etas_es58x/es58x_core.c
index 3b949e9..51294b7 100644 (file)
--- a/drivers/net/can/usb/etas_es58x/es58x_core.c
+++ b/drivers/net/can/usb/etas_es58x/es58x_core.c
@@ -1460,10 +1460,6 @@ static void es58x_read_bulk_callback(struct urb *urb)
        }
 
  resubmit_urb:
-       usb_fill_bulk_urb(urb, es58x_dev->udev, es58x_dev->rx_pipe,
-                         urb->transfer_buffer, urb->transfer_buffer_length,
-                         es58x_read_bulk_callback, es58x_dev);
-
        ret = usb_submit_urb(urb, GFP_ATOMIC);
        if (ret == -ENODEV) {
                for (i = 0; i < es58x_dev->num_can_ch; i++)
@@ -1597,7 +1593,8 @@ static struct urb *es58x_get_tx_urb(struct es58x_device *es58x_dev)
                        return NULL;
 
                usb_fill_bulk_urb(urb, es58x_dev->udev, es58x_dev->tx_pipe,
-                                 buf, tx_buf_len, NULL, NULL);
+                                 buf, tx_buf_len, es58x_write_bulk_callback,
+                                 NULL);
                return urb;
        }
 
@@ -1630,9 +1627,7 @@ static int es58x_submit_urb(struct es58x_device *es58x_dev, struct urb *urb,
        int ret;
 
        es58x_set_crc(urb->transfer_buffer, urb->transfer_buffer_length);
-       usb_fill_bulk_urb(urb, es58x_dev->udev, es58x_dev->tx_pipe,
-                         urb->transfer_buffer, urb->transfer_buffer_length,
-                         es58x_write_bulk_callback, netdev);
+       urb->context = netdev;
        usb_anchor_urb(urb, &es58x_dev->tx_urbs_busy);
        ret = usb_submit_urb(urb, GFP_ATOMIC);
        if (ret) {