diff options
| author | Oleksij Rempel <o.rempel@pengutronix.de> | 2026-03-05 15:34:26 +0100 |
|---|---|---|
| committer | Greg Kroah-Hartman <gregkh@linuxfoundation.org> | 2026-03-19 16:15:00 +0100 |
| commit | 9dba26e99f435989cbc012af54503c44d1d31cd5 (patch) | |
| tree | 6ef43b1e3336a16be1ac880e4e3ea6190b16b228 /drivers/net/usb/lan78xx.h | |
| parent | c6470c3fbb1a327ccbb18428e42d8b8f09f2f045 (diff) | |
net: usb: lan78xx: fix silent drop of packets with checksum errors
commit e4f774a0cc955ce762aec91c66915a6e15087ab7 upstream.
Do not drop packets with checksum errors at the USB driver level;
pass them to the network stack.
Previously, the driver dropped all packets where the 'Receive Error
Detected' (RED) bit was set, regardless of the specific error type. This
caused packets with only IP or TCP/UDP checksum errors to be dropped
before reaching the kernel, preventing the network stack from accounting
for them or performing software fallback.
Add a mask for hard hardware errors to safely drop genuinely corrupt
frames, while allowing checksum-errored frames to pass with their
ip_summed field explicitly set to CHECKSUM_NONE.
Fixes: 55d7de9de6c3 ("Microchip's LAN7800 family USB 2/3 to 10/100/1000 Ethernet device driver")
Cc: stable@vger.kernel.org
Signed-off-by: Oleksij Rempel <o.rempel@pengutronix.de>
Link: https://patch.msgid.link/20260305143429.530909-2-o.rempel@pengutronix.de
Signed-off-by: Jakub Kicinski <kuba@kernel.org>
Signed-off-by: Greg Kroah-Hartman <gregkh@linuxfoundation.org>
Diffstat (limited to 'drivers/net/usb/lan78xx.h')
| -rw-r--r-- | drivers/net/usb/lan78xx.h | 3 |
1 files changed, 3 insertions, 0 deletions
diff --git a/drivers/net/usb/lan78xx.h b/drivers/net/usb/lan78xx.h index 968e5e5faee0..17a934acff3d 100644 --- a/drivers/net/usb/lan78xx.h +++ b/drivers/net/usb/lan78xx.h @@ -74,6 +74,9 @@ #define RX_CMD_A_ICSM_ (0x00004000) #define RX_CMD_A_LEN_MASK_ (0x00003FFF) +#define RX_CMD_A_RX_HARD_ERRS_MASK_ \ + (RX_CMD_A_RX_ERRS_MASK_ & ~RX_CMD_A_CSE_MASK_) + /* Rx Command B */ #define RX_CMD_B_CSUM_SHIFT_ (16) #define RX_CMD_B_CSUM_MASK_ (0xFFFF0000) |