2018-02-02 08:44:43

by Hayes Wang

Subject: [PATCH net 0/2] r8152: fix rx issues

The two patched are used to fix rx issues.

Hayes Wang (2):
r8152: fix wrong checksum status for received IPv4 packets
r8152: set rx mode early when linking on

drivers/net/usb/r8152.c | 13 ++++++-------
1 file changed, 6 insertions(+), 7 deletions(-)

--
2.13.6

2018-02-02 08:45:49

by Hayes Wang

Subject: [PATCH net 2/2] r8152: set rx mode early when linking on

Set rx mode before calling netif_wake_queue() when linking on to avoid
the device missing the receiving packets.

The transmission may start after calling netif_wake_queue(), and the
packets of resopnse may reach before calling rtl8152_set_rx_mode()
which let the device could receive packets. Then, the packets of
response would be missed.

Signed-off-by: Hayes Wang <[email protected]>
---
drivers/net/usb/r8152.c | 5 +++--
1 file changed, 3 insertions(+), 2 deletions(-)

diff --git a/drivers/net/usb/r8152.c b/drivers/net/usb/r8152.c
index 756de9ea8d2e..958b2e8b90f6 100644
--- a/drivers/net/usb/r8152.c
+++ b/drivers/net/usb/r8152.c
@@ -3795,11 +3795,12 @@ static void set_carrier(struct r8152 *tp)
if (speed & LINK_STATUS) {
if (!netif_carrier_ok(netdev)) {
tp->rtl_ops.enable(tp);
- set_bit(RTL8152_SET_RX_MODE, &tp->flags);
netif_stop_queue(netdev);
napi_disable(napi);
netif_carrier_on(netdev);
rtl_start_rx(tp);
+ clear_bit(RTL8152_SET_RX_MODE, &tp->flags);
+ _rtl8152_set_rx_mode(netdev);
napi_enable(&tp->napi);
netif_wake_queue(netdev);
netif_info(tp, link, netdev, "carrier on\n");
@@ -4259,7 +4260,7 @@ static int rtl8152_post_reset(struct usb_interface *intf)
mutex_lock(&tp->control);
tp->rtl_ops.enable(tp);
rtl_start_rx(tp);
- rtl8152_set_rx_mode(netdev);
+ _rtl8152_set_rx_mode(netdev);
mutex_unlock(&tp->control);
}

--
2.13.6

2018-02-02 08:46:15

by Hayes Wang

Subject: [PATCH net 1/2] r8152: fix wrong checksum status for received IPv4 packets

The device could only check the checksum of TCP and UDP packets. Therefore,
for the IPv4 packets excluding TCP and UDP, the check of checksum is necessary,
even though the IP checksum is correct.

Take ICMP for example, The IP checksum may be correct, but the ICMP checksum
may be wrong.

Signed-off-by: Hayes Wang <[email protected]>
---
drivers/net/usb/r8152.c | 8 +++-----
1 file changed, 3 insertions(+), 5 deletions(-)

diff --git a/drivers/net/usb/r8152.c b/drivers/net/usb/r8152.c
index 0657203ffb91..756de9ea8d2e 100644
--- a/drivers/net/usb/r8152.c
+++ b/drivers/net/usb/r8152.c
@@ -1848,11 +1848,9 @@ static u8 r8152_rx_csum(struct r8152 *tp, struct rx_desc *rx_desc)
if (opts2 & RD_IPV4_CS) {
if (opts3 & IPF)
checksum = CHECKSUM_NONE;
- else if ((opts2 & RD_UDP_CS) && (opts3 & UDPF))
- checksum = CHECKSUM_NONE;
- else if ((opts2 & RD_TCP_CS) && (opts3 & TCPF))
- checksum = CHECKSUM_NONE;
- else
+ else if ((opts2 & RD_UDP_CS) && !(opts3 & UDPF))
+ checksum = CHECKSUM_UNNECESSARY;
+ else if ((opts2 & RD_TCP_CS) && !(opts3 & TCPF))
checksum = CHECKSUM_UNNECESSARY;
} else if (opts2 & RD_IPV6_CS) {
if ((opts2 & RD_UDP_CS) && !(opts3 & UDPF))
--
2.13.6

2018-02-03 01:28:21

by David Miller

Subject: Re: [PATCH net 0/2] r8152: fix rx issues

From: Hayes Wang <[email protected]>
Date: Fri, 2 Feb 2018 16:43:34 +0800

> The two patched are used to fix rx issues.

Series applied.