net: usb: sr9700: replace magic numbers with register bit macros

The first byte of the Rx frame is a copy of the Rx status register, so
0x40 corresponds to RSR_MF (meaning the frame is multicast). Replace
0x40 with RSR_MF for clarity. (All other bits of the RSR indicate
errors. The fact that the driver ignores these errors will be fixed by
a later patch.)

The first byte of the status URB is a copy of the NSR, so 0x40
corresponds to NSR_LINKST. Replace 0x40 with NSR_LINKST for clarity.

Signed-off-by: Ethan Nelson-Moore <enelsonmoore@gmail.com>
Reviewed-by: Peter Korsgaard <peter@korsgaard.com>
Link: https://patch.msgid.link/20260124032248.26807-1-enelsonmoore@gmail.com
Signed-off-by: Jakub Kicinski <kuba@kernel.org>

diff --git a/drivers/net/usb/sr9700.c b/drivers/net/usb/sr9700.c
index dba8615ca85424c5900aab07b8569e35ae922172..49764bcf09124b30ce3b6b3f8a7410c6c31e61a2 100644 (file)
--- a/drivers/net/usb/sr9700.c
+++ b/drivers/net/usb/sr9700.c
@@ -366,7 +366,7 @@ static int sr9700_rx_fixup(struct usbnet *dev, struct sk_buff *skb)
 
        /* one skb may contains multiple packets */
        while (skb->len > SR_RX_OVERHEAD) {
-               if (skb->data[0] != 0x40)
+               if (skb->data[0] != RSR_MF)
                        return 0;
 
                /* ignore the CRC length */
@@ -455,7 +455,7 @@ static void sr9700_status(struct usbnet *dev, struct urb *urb)
 
        buf = urb->transfer_buffer;
 
-       link = !!(buf[0] & 0x40);
+       link = !!(buf[0] & NSR_LINKST);
        sr9700_handle_link_change(dev->net, link);
 }