diff options
| author | Eric Dumazet <[email protected]> | 2020-01-13 09:27:11 -0800 |
|---|---|---|
| committer | David S. Miller <[email protected]> | 2020-01-14 11:04:42 -0800 |
| commit | f8d7408a4d7f60f8b2df0f81decdc882dd9c20dc (patch) | |
| tree | 4e0109b6d619de6896dd63a004a862443d56cf21 | |
| parent | 75718584cb3c64e6269109d4d54f888ac5a5fd15 (diff) | |
net: usb: lan78xx: limit size of local TSO packets
lan78xx_tx_bh() makes sure to not exceed MAX_SINGLE_PACKET_SIZE
bytes in the aggregated packets it builds, but does
nothing to prevent large GSO packets being submitted.
Pierre-Francois reported various hangs when/if TSO is enabled.
For localy generated packets, we can use netif_set_gso_max_size()
to limit the size of TSO packets.
Note that forwarded packets could still hit the issue,
so a complete fix might require implementing .ndo_features_check
for this driver, forcing a software segmentation if the size
of the TSO packet exceeds MAX_SINGLE_PACKET_SIZE.
Fixes: 55d7de9de6c3 ("Microchip's LAN7800 family USB 2/3 to 10/100/1000 Ethernet device driver")
Signed-off-by: Eric Dumazet <[email protected]>
Reported-by: RENARD Pierre-Francois <[email protected]>
Tested-by: RENARD Pierre-Francois <[email protected]>
Cc: Stefan Wahren <[email protected]>
Cc: Woojung Huh <[email protected]>
Cc: Microchip Linux Driver Support <[email protected]>
Signed-off-by: David S. Miller <[email protected]>
| -rw-r--r-- | drivers/net/usb/lan78xx.c | 1 |
1 files changed, 1 insertions, 0 deletions
diff --git a/drivers/net/usb/lan78xx.c b/drivers/net/usb/lan78xx.c index fb4781080d6d..75bdfae5f3e2 100644 --- a/drivers/net/usb/lan78xx.c +++ b/drivers/net/usb/lan78xx.c @@ -3750,6 +3750,7 @@ static int lan78xx_probe(struct usb_interface *intf, /* MTU range: 68 - 9000 */ netdev->max_mtu = MAX_SINGLE_PACKET_SIZE; + netif_set_gso_max_size(netdev, MAX_SINGLE_PACKET_SIZE - MAX_HEADER); dev->ep_blkin = (intf->cur_altsetting)->endpoint + 0; dev->ep_blkout = (intf->cur_altsetting)->endpoint + 1; |