From: "Grumbach, Emmanuel" <emmanuel.grumbach@intel.com>
To: "linux-wireless@vger.kernel.org" <linux-wireless@vger.kernel.org>,
"bp@alien8.de" <bp@alien8.de>
Cc: "linux-kernel@vger.kernel.org" <linux-kernel@vger.kernel.org>,
linuxwifi <linuxwifi@intel.com>,
"Dreyfuss, Haim" <haim.dreyfuss@intel.com>,
"Coelho, Luciano" <luciano.coelho@intel.com>,
"Berg, Johannes" <johannes.berg@intel.com>,
"kvalo@codeaurora.org" <kvalo@codeaurora.org>,
"netdev@vger.kernel.org" <netdev@vger.kernel.org>,
"Sharon, Sara" <sara.sharon@intel.com>
Subject: Re: WARNING: CPU: 1 PID: 2485 at drivers/net/wireless/intel/iwlwifi/pcie/trans.c:1752 iwl_trans_pcie_grab_nic_access+0x110/0x120 [iwlwifi]
Date: Fri, 15 Apr 2016 04:16:02 +0000 [thread overview]
Message-ID: <1460693762.2648.5.camel@intel.com> (raw)
In-Reply-To: <20160415020710.GA2700@cz.tnic>
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WARNING: multiple messages have this Message-ID (diff)
From: "Grumbach, Emmanuel" <emmanuel.grumbach@intel.com>
To: "linux-wireless@vger.kernel.org" <linux-wireless@vger.kernel.org>,
"bp@alien8.de" <bp@alien8.de>
Cc: "linux-kernel@vger.kernel.org" <linux-kernel@vger.kernel.org>,
linuxwifi <linuxwifi@intel.com>,
"Dreyfuss, Haim" <haim.dreyfuss@intel.com>,
"Coelho, Luciano" <luciano.coelho@intel.com>,
"Berg, Johannes" <johannes.berg@intel.com>,
"kvalo@codeaurora.org" <kvalo@codeaurora.org>,
"netdev@vger.kernel.org" <netdev@vger.kernel.org>,
"Sharon, Sara" <sara.sharon@intel.com>
Subject: Re: WARNING: CPU: 1 PID: 2485 at drivers/net/wireless/intel/iwlwifi/pcie/trans.c:1752 iwl_trans_pcie_grab_nic_access+0x110/0x120 [iwlwifi]
Date: Fri, 15 Apr 2016 04:16:02 +0000 [thread overview]
Message-ID: <1460693762.2648.5.camel@intel.com> (raw)
In-Reply-To: <20160415020710.GA2700@cz.tnic>
On Fri, 2016-04-15 at 02:07 +0000, Borislav Petkov wrote:
> Hi,
>
> so I'm seeing this when wlan0 tries to associate. On 4.6-rc2 + tip.
> After that, wifi is dead in the water. Anyone have a clue?
>
> And 4.5 seems fine, I'm typing from it as we speak.
> ...
<snip>
> [ 661.142657] ------------[ cut here ]------------
> [ 661.142816] WARNING: CPU: 1 PID: 2485 at
> drivers/net/wireless/intel/iwlwifi/pcie/trans.c:1752
> iwl_trans_pcie_grab_nic_access+0x110/0x120 [iwlwifi]
> [ 661.143231] Timeout waiting for hardware access (CSR_GP_CNTRL
> 0xffffffff)
>
This means that we have an electrical issue that prevents us from
accessing the device over the PCI bus. BAR has been garbaged or alike.
Every time I tried to debug that from the driver side it has ...
failed. Because the "good" in the end did exhibit the problem. So,
unless you are ready to embark for a bisection journey (and hope that
this time when you type 'git bisect good' it is really 'good'), I can't
do much.
What I can suggest is to install our latest backport based tree on 4.5.
This will allow you to have an easily bisectable tree. But it might
very well be that 4.5 + latest driver (equivalent to 4.6 as far as
iwlwifi is concerned) will be fine.
The backport tree is here [1]. Unfortunately, that's the only thing I
can suggest for now.
[1] https://git.kernel.org/cgit/linux/kernel/git/iwlwifi/backport-iwlwi
fi.git/
> --
> Regards/Gruss,
> Boris.
>
> ECO tip #101: Trim your mails when you reply. Srsly.
WARNING: multiple messages have this Message-ID (diff)
From: "Grumbach, Emmanuel" <emmanuel.grumbach-ral2JQCrhuEAvxtiuMwx3w@public.gmane.org>
To: "linux-wireless-u79uwXL29TY76Z2rM5mHXA@public.gmane.org"
<linux-wireless-u79uwXL29TY76Z2rM5mHXA@public.gmane.org>,
"bp-Gina5bIWoIWzQB+pC5nmwQ@public.gmane.org"
<bp-Gina5bIWoIWzQB+pC5nmwQ@public.gmane.org>
Cc: "linux-kernel-u79uwXL29TY76Z2rM5mHXA@public.gmane.org"
<linux-kernel-u79uwXL29TY76Z2rM5mHXA@public.gmane.org>,
linuxwifi <linuxwifi-ral2JQCrhuEAvxtiuMwx3w@public.gmane.org>,
"Dreyfuss,
Haim" <haim.dreyfuss-ral2JQCrhuEAvxtiuMwx3w@public.gmane.org>,
"Coelho,
Luciano" <luciano.coelho-ral2JQCrhuEAvxtiuMwx3w@public.gmane.org>,
"Berg,
Johannes" <johannes.berg-ral2JQCrhuEAvxtiuMwx3w@public.gmane.org>,
"kvalo-sgV2jX0FEOL9JmXXK+q4OQ@public.gmane.org"
<kvalo-sgV2jX0FEOL9JmXXK+q4OQ@public.gmane.org>,
"netdev-u79uwXL29TY76Z2rM5mHXA@public.gmane.org"
<netdev-u79uwXL29TY76Z2rM5mHXA@public.gmane.org>,
"Sharon,
Sara" <sara.sharon-ral2JQCrhuEAvxtiuMwx3w@public.gmane.org>
Subject: Re: WARNING: CPU: 1 PID: 2485 at drivers/net/wireless/intel/iwlwifi/pcie/trans.c:1752 iwl_trans_pcie_grab_nic_access+0x110/0x120 [iwlwifi]
Date: Fri, 15 Apr 2016 04:16:02 +0000 [thread overview]
Message-ID: <1460693762.2648.5.camel@intel.com> (raw)
In-Reply-To: <20160415020710.GA2700-q7QVrfafQE0@public.gmane.org>
On Fri, 2016-04-15 at 02:07 +0000, Borislav Petkov wrote:
> Hi,
>
> so I'm seeing this when wlan0 tries to associate. On 4.6-rc2 + tip.
> After that, wifi is dead in the water. Anyone have a clue?
>
> And 4.5 seems fine, I'm typing from it as we speak.
> ...
<snip>
> [ 661.142657] ------------[ cut here ]------------
> [ 661.142816] WARNING: CPU: 1 PID: 2485 at
> drivers/net/wireless/intel/iwlwifi/pcie/trans.c:1752
> iwl_trans_pcie_grab_nic_access+0x110/0x120 [iwlwifi]
> [ 661.143231] Timeout waiting for hardware access (CSR_GP_CNTRL
> 0xffffffff)
>
This means that we have an electrical issue that prevents us from
accessing the device over the PCI bus. BAR has been garbaged or alike.
Every time I tried to debug that from the driver side it has ...
failed. Because the "good" in the end did exhibit the problem. So,
unless you are ready to embark for a bisection journey (and hope that
this time when you type 'git bisect good' it is really 'good'), I can't
do much.
What I can suggest is to install our latest backport based tree on 4.5.
This will allow you to have an easily bisectable tree. But it might
very well be that 4.5 + latest driver (equivalent to 4.6 as far as
iwlwifi is concerned) will be fine.
The backport tree is here [1]. Unfortunately, that's the only thing I
can suggest for now.
[1] https://git.kernel.org/cgit/linux/kernel/git/iwlwifi/backport-iwlwi
fi.git/
> --
> Regards/Gruss,
> Boris.
>
> ECO tip #101: Trim your mails when you reply. Srsly.
next prev parent reply other threads:[~2016-04-15 4:16 UTC|newest]
Thread overview: 9+ messages / expand[flat|nested] mbox.gz Atom feed top
2016-04-15 2:07 WARNING: CPU: 1 PID: 2485 at drivers/net/wireless/intel/iwlwifi/pcie/trans.c:1752 iwl_trans_pcie_grab_nic_access+0x110/0x120 [iwlwifi] Borislav Petkov
2016-04-15 2:07 ` Borislav Petkov
2016-04-15 4:16 ` Grumbach, Emmanuel [this message]
2016-04-15 4:16 ` Grumbach, Emmanuel
2016-04-15 4:16 ` Grumbach, Emmanuel
2016-04-16 15:43 ` Borislav Petkov
2016-04-16 15:43 ` Borislav Petkov
2016-04-16 19:53 ` Grumbach, Emmanuel
2016-04-16 19:53 ` Grumbach, Emmanuel
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