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Date: Wed, 06 Nov 2013 19:50:30 +0200
From: Emmanuel Grumbach <egrumbach@gmail.com>
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To: wzyboy <wzyboy@wzyboy.org>,
	"Grumbach, Emmanuel" <emmanuel.grumbach@intel.com>,
	Bjorn Helgaas <bhelgaas@google.com>
CC: "ilw@linux.intel.com" <ilw@linux.intel.com>,
	"linux-wireless@vger.kernel.org" <linux-wireless@vger.kernel.org>,
	linux-pci@vger.kernel.org
Subject: Re: [Ilw] Intel Wireless 7260 hardware timed out randomly
References: <5276134B.8070808@wzyboy.org> <CALkVjQYh-SUte4S6LdqOc3KSc3_pDU6jz1KXp+Jsd5_RFPXSqA@mail.gmail.com> <0BA3FCBA62E2DC44AF3030971E174FB301DE8338@HASMSX103.ger.corp.intel.com> <CALkVjQb7fCMFpqhdUs8w-Mx_Y0RtAYYFtKxXkqyrCQ39UFGxKg@mail.gmail.com> <0BA3FCBA62E2DC44AF3030971E174FB301DE960E@HASMSX103.ger.corp.intel.com> <CALkVjQbW8FeiEh8pBZ=KQFD9+8AdjgT0G_RG7qJe0MRdBvMD-A@mail.gmail.com> <CALkVjQaLx2spaOqUPcs_EwMkU7npMki1Reo1MeZwxB7m=c24=g@mail.gmail.com> <0BA3FCBA62E2DC44AF3030971E174FB301DE9FC6@HASMSX103.ger.corp.intel.com> <CALkVjQZDNSgUUFyi94Y8da_NDzW61rCvaMrZpUugFKW_LRNFFA@mail.gmail.com> <0BA3FCBA62E2DC44AF3030971E174FB301DEA052@HASMSX103.ger.corp.intel.com> <CALkVjQZRJw7ghjBa1aPKNKe3Zj2B1Mhk5bWVaRdcCYzfoLRovg@mail.gmail.com> <CALkVjQY7r=YKhsgDKR0mnYVtZy5BAdj83nY2jL0VFaiew6ha7A@mail.gmail.com> <0BA3FCBA62E2DC44AF3030971E174FB301DEA097@HASMSX103.ger.corp.intel.com> <CALkVjQY7uRFQ3Qs9T_bgqnYRNcWgsk5gfd=R8RfGFxOdDpFYTQ@mail.gmail.com>
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Sender: linux-pci-owner@vger.kernel.org
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Hi,

adding PCI folks.
Here is the story:

* Wzyboy has a Lenovo laptop with _OSC control *not* granted
* L1 Active is enabled
* kernel: 3.12.0
* Nic is PCIe (Gen2 but not sure...)

At some random point, the driver loses access to the NIC: all readl
operation return 0xff.
Even lspci returns 0xff:

03:00.0 Network controller: Intel Corporation Wireless 7260 (rev ff)
00: ff ff ff ff ff ff ff ff ff ff ff ff ff ff ff ff
10: ff ff ff ff ff ff ff ff ff ff ff ff ff ff ff ff
20: ff ff ff ff ff ff ff ff ff ff ff ff ff ff ff ff
30: ff ff ff ff ff ff ff ff ff ff ff ff ff ff ff ff

here is the output of lspci *before* the issue hits:

03:00.0 Network controller: Intel Corporation Wireless 7260 (rev 6b)
00: 86 80 b2 08 06 04 10 00 6b 00 80 02 10 00 00 00
10: 04 00 40 f0 00 00 00 00 00 00 00 00 00 00 00 00
20: 00 00 00 00 00 00 00 00 00 00 00 00 86 80 62 c2
30: 00 00 00 00 c8 00 00 00 00 00 00 00 09 01 00 00

have you any idea of what we can do to understand what it going wrong here?

Thanks

On 11/06/2013 09:12 AM, wzyboy wrote:
> 2013/11/6 Grumbach, Emmanuel <emmanuel.grumbach@intel.com>:
>> Wait - you mean that after the bug occurred before you rebooted, lspci -xxx show all 00?
>> I can see 0xff here.
>> Anyway - this is very bad... checking with HW guys...
> 
> 
> Sorry, that's my typo. They are all 0xff... (I don't know what do they
> mean but it look bad...)
> 
> Thanks for your effort! I'm waiting for good news from you and HW guys. :-)
>