TWxSoftware/twx-linux
1
0
Fork 0
Code Issues Pull Requests Actions Packages Projects Releases Wiki Activity

ixgbe: add double of VLAN header when computing the max MTU

Browse Source 
commit 0967bf8377 upstream.

Include the second VLAN HLEN into account when computing the maximum
MTU size as other drivers do.

Fixes: fabf1bce10 ("ixgbe: Prevent unsupported configurations with XDP")
Signed-off-by: Jason Xing <kernelxing@tencent.com>
Reviewed-by: Alexander Duyck <alexanderduyck@fb.com>
Tested-by: Chandan Kumar Rout <chandanx.rout@intel.com> (A Contingent Worker at Intel)
Signed-off-by: Tony Nguyen <anthony.l.nguyen@intel.com>
Signed-off-by: Greg Kroah-Hartman <gregkh@linuxfoundation.org>
This commit is contained in:
Jason Xing
2023-02-09 10:41:28 +08:00
committed by Greg Kroah-Hartman
parent 7ff0fdba82
commit 1a4a5fd652
2 changed files with 3 additions and 2 deletions
Download Patch File Download Diff File Expand all files Collapse all files
drivers/net/ethernet/intel/ixgbe/ixgbe.h
+2
View File
@@ -67,6 +67,8 @@
#define IXGBE_RXBUFFER_4K 4096
#define IXGBE_MAX_RXBUFFER 16384 /* largest size for a single descriptor */
#define IXGBE_PKT_HDR_PAD (ETH_HLEN + ETH_FCS_LEN + (VLAN_HLEN * 2))
/* Attempt to maximize the headroom available for incoming frames. We
* use a 2K buffer for receives and need 1536/1534 to store the data for
* the frame. This leaves us with 512 bytes of room. From that we need
drivers/net/ethernet/intel/ixgbe/ixgbe_main.c
+1 -2
View File
@@ -6752,8 +6752,7 @@ static int ixgbe_change_mtu(struct net_device *netdev, int new_mtu)
struct ixgbe_adapter *adapter = netdev_priv(netdev);
if (ixgbe_enabled_xdp_adapter(adapter)) {
int new_frame_size = new_mtu + ETH_HLEN + ETH_FCS_LEN +
VLAN_HLEN;
int new_frame_size = new_mtu + IXGBE_PKT_HDR_PAD;
if (new_frame_size > ixgbe_max_xdp_frame_size(adapter)) {
e_warn(probe, "Requested MTU size is not supported with XDP\n");