Re: iwlwifi firmware load broken in current -git

From: Luca Coelho <luca@coelho.fi>
To: "Grumbach, Emmanuel" <emmanuel.grumbach@intel.com>,
	"axboe@kernel.dk" <axboe@kernel.dk>,
	"Berg, Johannes" <johannes.berg@intel.com>
Cc: linuxwifi <linuxwifi@intel.com>,
	"linux-wireless@vger.kernel.org" <linux-wireless@vger.kernel.org>
Subject: Re: iwlwifi firmware load broken in current -git
Date: Tue, 12 Sep 2017 19:36:27 +0300	[thread overview]
Message-ID: <1505234187.5400.249.camel@coelho.fi> (raw)
In-Reply-To: <1505232673.5400.243.camel@intel.com>

On Tue, 2017-09-12 at 16:11 +0000, Coelho, Luciano wrote:
> Hi Jens,
> 
> On Tue, 2017-09-12 at 09:48 -0600, Jens Axboe wrote:
> > Hi,
> > 
> > I have no wifi in current git (8fac2f96ab8), it simply fails with:
> > 
> > [    4.363481] iwlwifi 0000:04:00.0: Direct firmware load for iwlwifi-8000C-34.ucode failed with error -2
> > [    4.363733] iwlwifi 0000:04:00.0: Direct firmware load for iwlwifi-8000C-33.ucode failed with error -2
> > [    4.363744] iwlwifi 0000:04:00.0: Direct firmware load for iwlwifi-8000C-32.ucode failed with error -2
> > [    4.368077] iwlwifi 0000:04:00.0: loaded firmware version 31.532993.0 op_mode iwlmvm
> > [    4.461753] iwlwifi 0000:04:00.0: Detected Intel(R) Dual Band Wireless AC 8260, REV=0x208
> > [ ... ]
> > [    9.510570] iwlwifi 0000:04:00.0: Failed to load firmware chunk!             
> > [    9.513903] iwlwifi 0000:04:00.0: Could not load the [0] uCode section       
> > [    9.516201] iwlwifi 0000:04:00.0: Failed to start INIT ucode: -110           
> > [    9.530842] iwlwifi 0000:04:00.0: Failed to run INIT ucode: -110             
> > 
> > I get the same thing with -27 of the firmware:
> > 
> > [   60.990831] Intel(R) Wireless WiFi driver for Linux                          
> > [   60.990833] Copyright(c) 2003- 2015 Intel Corporation                        
> > [   60.991936] iwlwifi 0000:04:00.0: Direct firmware load for iwlwifi-8000C-34.ucode failed with error -2
> > [   60.991941] iwlwifi 0000:04:00.0: Direct firmware load for iwlwifi-8000C-33.ucode failed with error -2
> > [   60.991946] iwlwifi 0000:04:00.0: Direct firmware load for iwlwifi-8000C-32.ucode failed with error -2
> > [   60.991957] iwlwifi 0000:04:00.0: Direct firmware load for iwlwifi-8000C-31.ucode failed with error -2
> > [   60.991964] iwlwifi 0000:04:00.0: Direct firmware load for iwlwifi-8000C-30.ucode failed with error -2
> > [   60.991969] iwlwifi 0000:04:00.0: Direct firmware load for iwlwifi-8000C-29.ucode failed with error -2
> > [   60.991975] iwlwifi 0000:04:00.0: Direct firmware load for iwlwifi-8000C-28.ucode failed with error -2
> > [   61.029852] iwlwifi 0000:04:00.0: loaded firmware version 27.541033.0 op_mode iwlmvm
> > [   61.043660] iwlwifi 0000:04:00.0: Detected Intel(R) Dual Band Wireless AC 8260, REV=0x208
> > [   66.070135] iwlwifi 0000:04:00.0: Failed to load firmware chunk!             
> > [   66.070149] iwlwifi 0000:04:00.0: Could not load the [0] uCode section       
> > [   66.070165] iwlwifi 0000:04:00.0: Failed to start INIT ucode: -110           
> > [   66.083462] iwlwifi 0000:04:00.0: Failed to run INIT ucode: -110             
> > 
> > Things work fine in 4.13-rc7+, which was the last kernel I ran on my laptop.
> 
> This is strange, Linus has been running this same combination with -31
> (with -27 we had a regression, but it was fixed recently and the fix is
> in the current master).  I have also tried this combination with both
> -27 and -31 after my fix and it works fine.
> 
> There are only a couple of other patches that may affect iwlwifi since
> the previous net-next.git pull request...
> 
> I'll try this combination on my machine and see if I can reproduce the
> problem.

I just booted my machine with the latest linux.git/master (8fac2f96ab86)
and it works without a problem:

[    8.902174] Intel(R) Wireless WiFi driver for Linux
[    8.902174] Copyright(c) 2003- 2015 Intel Corporation
[    8.995112] iwlwifi 0000:02:00.0: Direct firmware load for iwlwifi-8000C-34.ucode failed with error -2
[    8.995136] iwlwifi 0000:02:00.0: Direct firmware load for iwlwifi-8000C-33.ucode failed with error -2
[    9.026455] iwlwifi 0000:02:00.0: Direct firmware load for iwlwifi-8000C-32.ucode failed with error -2
[    9.348325] iwlwifi 0000:02:00.0: loaded firmware version 31.532993.0 op_mode iwlmvm
[    9.369307] iwlwifi 0000:02:00.0: Detected Intel(R) Dual Band Wireless AC 8260, REV=0x208
[    9.435915] iwlwifi 0000:02:00.0: base HW address: 34:13:e8:2d:65:ef
[    9.509217] ieee80211 phy0: Selected rate control algorithm 'iwl-mvm-rs'

So this seems to be something that doesn't happen in all machines, maybe
a PCIe problem?

Is there any chance you could try to bisect this?

--
Cheers,
Luca.