eth: asix88179: packet drop when receiving large fragmented packets
The ASIX 88179A drops packets when receiving fragmented packets larger
than the MTU size due to an insufficient URB buffer size. This change
synchronizes the URB buffer size with the configuration used in the
Linux kernel, resolving the packet drop issue.
To reproduce the issue, set the following configuration:
CONFIG_IP_DEFRAG=y
CONFIG_TFTP_BLOCKSIZE=16352
Then, run the `tftp` command. It will fail with a timeout error:
U-Boot> tftp zero.bin
Using ax88179_eth device
TFTP from server 10.0.0.196; our IP address is 10.0.0.18
Filename 'zero.bin'
Load address: 0x10000000
Loading: T T T T T T T T T T T
Retry count exceeded; starting again
Signed-off-by: Khoa Hoang <admin@khoahoang.com>
Reviewed-by: Marek Vasut <marex@denx.de>
diff --git a/drivers/usb/eth/asix88179.c b/drivers/usb/eth/asix88179.c
index 4bd353b..69d3073 100644
--- a/drivers/usb/eth/asix88179.c
+++ b/drivers/usb/eth/asix88179.c
@@ -173,7 +173,7 @@
#define USB_BULK_SEND_TIMEOUT 5000
#define USB_BULK_RECV_TIMEOUT 5000
-#define AX_RX_URB_SIZE 1024 * 0x12
+#define AX_RX_URB_SIZE 1024 * 0x1a
#define BLK_FRAME_SIZE 0x200
#define PHY_CONNECT_TIMEOUT 5000
#define PHY_RESET_TIMEOUT 500
@@ -193,10 +193,10 @@
static const struct {
unsigned char ctrl, timer_l, timer_h, size, ifg;
} AX88179_BULKIN_SIZE[] = {
- {7, 0x4f, 0, 0x02, 0xff},
- {7, 0x20, 3, 0x03, 0xff},
- {7, 0xae, 7, 0x04, 0xff},
- {7, 0xcc, 0x4c, 0x04, 8},
+ {7, 0x4f, 0, 0x12, 0xff},
+ {7, 0x20, 3, 0x16, 0xff},
+ {7, 0xae, 7, 0x18, 0xff},
+ {7, 0xcc, 0x4c, 0x18, 8},
};
/* driver private */
@@ -332,7 +332,7 @@
memcpy(tmp, &AX88179_BULKIN_SIZE[0], 5);
asix_write_cmd(dev, AX_ACCESS_MAC, AX_RX_BULKIN_QCTRL, 5, 5, tmp);
- dev_priv->rx_urb_size = 128 * 20;
+ dev_priv->rx_urb_size = 1024 * 20;
/* Water Level configuration */
*tmp = 0x34;