lkml.org 
[lkml]   [2007]   [Oct]   [7]   [last100]   RSS Feed
Views: [wrap][no wrap]   [headers]  [forward] 
 
Messages in this thread
Patch in this message
/
Date
From
SubjectRe: [PATCH 6/n] forcedeth: protect slow path with mutex
Jeff Garzik wrote:
> commit abca163a14b28c234df9bf38034bc967ff81c3aa
> Author: Jeff Garzik <jeff@garzik.org>
> Date: Sun Oct 7 07:22:14 2007 -0400
>
> [netdrvr] forcedeth: wrap slow path hw manipulation inside hw_mutex
>
> * This makes sure everybody who wants to start/stop the RX and TX engines
> first acquires this mutex.
>
> * tx_timeout code was deleted, replaced by scheduling reset_task.
>
> * linkchange moved to a workqueue (always inside hw_mutex)
>
> * simplified irq handling a bit
>
> * make sure to disable workqueues before NAPI
>
> Signed-off-by: Jeff Garzik <jgarzik@redhat.com>
>
> drivers/net/forcedeth.c | 272 ++++++++++++++++++++++++++++++------------------
> 1 file changed, 175 insertions(+), 97 deletions(-)

You will need the attached patch to even build (oops).

Also, testing shows there is a mutex deadlock somewhere.

diff --git a/drivers/net/forcedeth.c b/drivers/net/forcedeth.c
index d1c1efa..91926b1 100644
--- a/drivers/net/forcedeth.c
+++ b/drivers/net/forcedeth.c
@@ -2929,6 +2929,7 @@ static void nv_linkchange_task(struct work_struct *work)

static void nv_link_irq(struct net_device *dev)
{
+ struct fe_priv *np = netdev_priv(dev);
u8 __iomem *base = get_hwbase(dev);
u32 miistat;

@@ -4378,6 +4379,7 @@ static int nv_ethtool_begin (struct net_device *dev)
struct fe_priv *np = get_nvpriv(dev);

mutex_lock(&np->hw_mutex);
+ return 0;
}

static void nv_ethtool_complete (struct net_device *dev)
\
 
 \ /
  Last update: 2007-10-07 16:43    [W:0.075 / U:0.780 seconds]
©2003-2020 Jasper Spaans|hosted at Digital Ocean and TransIP|Read the blog|Advertise on this site