From: Mugunthan V N <mugunthanvnm@ti•com>
To: Daniel Mack <zonque@gmail•com>, <netdev@vger•kernel.org>
Cc: <davem@davemloft•net>
Subject: Re: [PATCH] net: ethernet: ti/cpsw: do not crash on single-MAC machines during resume
Date: Thu, 14 Nov 2013 18:39:45 +0530 [thread overview]
Message-ID: <5284CB99.2020707@ti.com> (raw)
In-Reply-To: <5284C87A.60404@gmail.com>
On Thursday 14 November 2013 06:26 PM, Daniel Mack wrote:
> On 11/14/2013 01:45 PM, Mugunthan V N wrote:
>> On Wednesday 13 November 2013 06:23 PM, Daniel Mack wrote:
>>> To prevent Oopses, cpsw_suspend() should only soft-reset sliver 1
>>> on dual MAC enabled machines.
>>>
>>> Signed-off-by: Daniel Mack <zonque@gmail•com>
>>> ---
>>> drivers/net/ethernet/ti/cpsw.c | 5 ++++-
>>> 1 file changed, 4 insertions(+), 1 deletion(-)
>>>
>>> diff --git a/drivers/net/ethernet/ti/cpsw.c b/drivers/net/ethernet/ti/cpsw.c
>>> index edd3e79..702b063 100644
>>> --- a/drivers/net/ethernet/ti/cpsw.c
>>> +++ b/drivers/net/ethernet/ti/cpsw.c
>>> @@ -2173,8 +2173,11 @@ static int cpsw_suspend(struct device *dev)
>>>
>>> if (netif_running(ndev))
>>> cpsw_ndo_stop(ndev);
>>> +
>>> soft_reset("sliver 0", &priv->slaves[0].sliver->soft_reset);
>>> - soft_reset("sliver 1", &priv->slaves[1].sliver->soft_reset);
>>> + if (priv->data.dual_emac)
>>> + soft_reset("sliver 1", &priv->slaves[1].sliver->soft_reset);
>> Is this tested on a system with both ports in switch mode?
> Nope. I got an Ooops when I tried to suspend a machine that has only one
> slave configured in DTS.
But the changes above will fail with system with two ports and in switch
mode.
>
>> I don't think this will not work with both ports in switch mode.
> Why? Isn't priv->data.dual_emac in that case? The same condition is
> checked for in cpsw_remove().
In cpsw_remove that check is used to unregister the second network
interface registered for same device for port 2. Now I got the issue,
this has to be done via for_each_slave().
Regards
Mugunthan V N
next prev parent reply other threads:[~2013-11-14 13:09 UTC|newest]
Thread overview: 6+ messages / expand[flat|nested] mbox.gz Atom feed top
2013-11-13 12:53 [PATCH] net: ethernet: ti/cpsw: do not crash on single-MAC machines during resume Daniel Mack
2013-11-14 12:45 ` Mugunthan V N
2013-11-14 12:56 ` Daniel Mack
2013-11-14 13:09 ` Mugunthan V N [this message]
2013-11-15 7:01 ` Daniel Mack
2013-11-14 21:21 ` David Miller
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