This is a note to let you know that I've just added the patch titled
mlx4_en: don't use napi_synchronize inside mlx4_en_netpoll
to the 3.10-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:
mlx4_en-don-t-use-napi_synchronize-inside-mlx4_en_netpoll.patch
and it can be found in the queue-3.10 subdirectory.
If you, or anyone else, feels it should not be added to the stable tree,
please let <[email protected]> know about it.
>From 0610ae43cefde18c9270e7c791faa629382200f1 Mon Sep 17 00:00:00 2001
From: Chris Mason <[email protected]>
Date: Tue, 15 Apr 2014 18:09:24 -0400
Subject: mlx4_en: don't use napi_synchronize inside mlx4_en_netpoll
From: Chris Mason <[email protected]>
commit c98235cb8584a72e95786e17d695a8e5fafcd766 upstream.
The mlx4 driver is triggering schedules while atomic inside
mlx4_en_netpoll:
spin_lock_irqsave(&cq->lock, flags);
napi_synchronize(&cq->napi);
^^^^^ msleep here
mlx4_en_process_rx_cq(dev, cq, 0);
spin_unlock_irqrestore(&cq->lock, flags);
This was part of a patch by Alexander Guller from Mellanox in 2011,
but it still isn't upstream.
Signed-off-by: Chris Mason <[email protected]>
Acked-By: Amir Vadai <[email protected]>
Signed-off-by: David S. Miller <[email protected]>
Signed-off-by: Jiri Slaby <[email protected]>
Cc: Masoud Sharbiani <[email protected]>
Signed-off-by: Greg Kroah-Hartman <[email protected]>
---
drivers/net/ethernet/mellanox/mlx4/en_cq.c | 1 -
drivers/net/ethernet/mellanox/mlx4/en_netdev.c | 6 +-----
drivers/net/ethernet/mellanox/mlx4/mlx4_en.h | 1 -
3 files changed, 1 insertion(+), 7 deletions(-)
--- a/drivers/net/ethernet/mellanox/mlx4/en_cq.c
+++ b/drivers/net/ethernet/mellanox/mlx4/en_cq.c
@@ -55,7 +55,6 @@ int mlx4_en_create_cq(struct mlx4_en_pri
cq->ring = ring;
cq->is_tx = mode;
- spin_lock_init(&cq->lock);
err = mlx4_alloc_hwq_res(mdev->dev, &cq->wqres,
cq->buf_size, 2 * PAGE_SIZE);
--- a/drivers/net/ethernet/mellanox/mlx4/en_netdev.c
+++ b/drivers/net/ethernet/mellanox/mlx4/en_netdev.c
@@ -1190,15 +1190,11 @@ static void mlx4_en_netpoll(struct net_d
{
struct mlx4_en_priv *priv = netdev_priv(dev);
struct mlx4_en_cq *cq;
- unsigned long flags;
int i;
for (i = 0; i < priv->rx_ring_num; i++) {
cq = &priv->rx_cq[i];
- spin_lock_irqsave(&cq->lock, flags);
- napi_synchronize(&cq->napi);
- mlx4_en_process_rx_cq(dev, cq, 0);
- spin_unlock_irqrestore(&cq->lock, flags);
+ napi_schedule(&cq->napi);
}
}
#endif
--- a/drivers/net/ethernet/mellanox/mlx4/mlx4_en.h
+++ b/drivers/net/ethernet/mellanox/mlx4/mlx4_en.h
@@ -299,7 +299,6 @@ struct mlx4_en_cq {
struct mlx4_cq mcq;
struct mlx4_hwq_resources wqres;
int ring;
- spinlock_t lock;
struct net_device *dev;
struct napi_struct napi;
int size;
Patches currently in stable-queue which might be from [email protected] are
queue-3.10/mlx4_en-don-t-use-napi_synchronize-inside-mlx4_en_netpoll.patch
--
To unsubscribe from this list: send the line "unsubscribe stable" in
the body of a message to [email protected]
More majordomo info at http://vger.kernel.org/majordomo-info.html
