This is a note to let you know that I've just added the patch titled
virtio_net: use control_buf for coalesce params
to the 6.1-stable tree which can be found at:
http://www.kernel.org/git/?p=linux/kernel/git/stable/stable-queue.git;a=summary
The filename of the patch is:
virtio_net-use-control_buf-for-coalesce-params.patch
and it can be found in the queue-6.1 subdirectory.
If you, or anyone else, feels it should not be added to the stable tree,
please let <stable@xxxxxxxxxxxxxxx> know about it.
>From accc1bf23068c1cdc4c2b015320ba856e210dd98 Mon Sep 17 00:00:00 2001
From: Brett Creeley <brett.creeley@xxxxxxx>
Date: Mon, 5 Jun 2023 12:59:25 -0700
Subject: virtio_net: use control_buf for coalesce params
From: Brett Creeley <brett.creeley@xxxxxxx>
commit accc1bf23068c1cdc4c2b015320ba856e210dd98 upstream.
Commit 699b045a8e43 ("net: virtio_net: notifications coalescing
support") added coalescing command support for virtio_net. However,
the coalesce commands are using buffers on the stack, which is causing
the device to see DMA errors. There should also be a complaint from
check_for_stack() in debug_dma_map_xyz(). Fix this by adding and using
coalesce params from the control_buf struct, which aligns with other
commands.
Cc: stable@xxxxxxxxxxxxxxx
Fixes: 699b045a8e43 ("net: virtio_net: notifications coalescing support")
Reviewed-by: Shannon Nelson <shannon.nelson@xxxxxxx>
Signed-off-by: Allen Hubbe <allen.hubbe@xxxxxxx>
Signed-off-by: Brett Creeley <brett.creeley@xxxxxxx>
Acked-by: Jason Wang <jasowang@xxxxxxxxxx>
Reviewed-by: Xuan Zhuo <xuanzhuo@xxxxxxxxxxxxxxxxx>
Acked-by: Michael S. Tsirkin <mst@xxxxxxxxxx>
Link: https://lore.kernel.org/r/20230605195925.51625-1-brett.creeley@xxxxxxx
Signed-off-by: Jakub Kicinski <kuba@xxxxxxxxxx>
Signed-off-by: Greg Kroah-Hartman <gregkh@xxxxxxxxxxxxxxxxxxx>
---
drivers/net/virtio_net.c | 16 ++++++++--------
1 file changed, 8 insertions(+), 8 deletions(-)
--- a/drivers/net/virtio_net.c
+++ b/drivers/net/virtio_net.c
@@ -200,6 +200,8 @@ struct control_buf {
__virtio16 vid;
__virtio64 offloads;
struct virtio_net_ctrl_rss rss;
+ struct virtio_net_ctrl_coal_tx coal_tx;
+ struct virtio_net_ctrl_coal_rx coal_rx;
};
struct virtnet_info {
@@ -2786,12 +2788,10 @@ static int virtnet_send_notf_coal_cmds(s
struct ethtool_coalesce *ec)
{
struct scatterlist sgs_tx, sgs_rx;
- struct virtio_net_ctrl_coal_tx coal_tx;
- struct virtio_net_ctrl_coal_rx coal_rx;
- coal_tx.tx_usecs = cpu_to_le32(ec->tx_coalesce_usecs);
- coal_tx.tx_max_packets = cpu_to_le32(ec->tx_max_coalesced_frames);
- sg_init_one(&sgs_tx, &coal_tx, sizeof(coal_tx));
+ vi->ctrl->coal_tx.tx_usecs = cpu_to_le32(ec->tx_coalesce_usecs);
+ vi->ctrl->coal_tx.tx_max_packets = cpu_to_le32(ec->tx_max_coalesced_frames);
+ sg_init_one(&sgs_tx, &vi->ctrl->coal_tx, sizeof(vi->ctrl->coal_tx));
if (!virtnet_send_command(vi, VIRTIO_NET_CTRL_NOTF_COAL,
VIRTIO_NET_CTRL_NOTF_COAL_TX_SET,
@@ -2802,9 +2802,9 @@ static int virtnet_send_notf_coal_cmds(s
vi->tx_usecs = ec->tx_coalesce_usecs;
vi->tx_max_packets = ec->tx_max_coalesced_frames;
- coal_rx.rx_usecs = cpu_to_le32(ec->rx_coalesce_usecs);
- coal_rx.rx_max_packets = cpu_to_le32(ec->rx_max_coalesced_frames);
- sg_init_one(&sgs_rx, &coal_rx, sizeof(coal_rx));
+ vi->ctrl->coal_rx.rx_usecs = cpu_to_le32(ec->rx_coalesce_usecs);
+ vi->ctrl->coal_rx.rx_max_packets = cpu_to_le32(ec->rx_max_coalesced_frames);
+ sg_init_one(&sgs_rx, &vi->ctrl->coal_rx, sizeof(vi->ctrl->coal_rx));
if (!virtnet_send_command(vi, VIRTIO_NET_CTRL_NOTF_COAL,
VIRTIO_NET_CTRL_NOTF_COAL_RX_SET,
Patches currently in stable-queue which might be from brett.creeley@xxxxxxx are
queue-6.1/virtio_net-use-control_buf-for-coalesce-params.patch
