From: Fabio Estevam <festevam@gmail.com>
To: Lucas Stach <l.stach@pengutronix.de>
Cc: lorenzo.pieralisi@arm.com, Richard Zhu <hongxing.zhu@nxp.com>,
"linux-pci@vger.kernel.org" <linux-pci@vger.kernel.org>,
Tim Harvey <tharvey@gateworks.com>,
patchwork-lst@pengutronix.de,
Peter Senna Tschudin <peter.senna@collabora.com>,
Sascha Hauer <kernel@pengutronix.de>,
Bjorn Helgaas <bhelgaas@google.com>,
"linux-arm-kernel@lists.infradead.org"
<linux-arm-kernel@lists.infradead.org>
Subject: Re: [PATCH] PCI: imx6: fix downstream bus scanning
Date: Wed, 10 May 2017 16:04:47 -0300 [thread overview]
Message-ID: <CAOMZO5AnDRbuvp3G-ruM+1fo+9_JPCApRDQ9=kuDL0NZXgHmqA@mail.gmail.com> (raw)
In-Reply-To: <CAOMZO5BYXx9VmhGrTv44O-njGQsz=GSRp9fA_VbkWapkqY+p=g@mail.gmail.com>
On Wed, May 10, 2017 at 3:35 PM, Fabio Estevam <festevam@gmail.com> wrote:
> Hi Lucas,
>
> On Wed, May 10, 2017 at 2:57 PM, Lucas Stach <l.stach@pengutronix.de> wrote:
>> The change in Linux 4.12 to make PCI configuartion requests non-posted
>> means that we are now getting a synchronous abort when the CFG space
>> read to probe for downstream devices times out.
>>
>> Synchronous aborts need to be handled differently from the async aborts
>> we were getting before, in particular the PC needs to be advanced when
>> resolving the abort. This is mostly a copy of what other PCI drivers do
>> on ARM to handle those aborts.
>>
>> Signed-off-by: Lucas Stach <l.stach@pengutronix.de>
>> ---
>> This is a fix that needs to go in for 4.12, but I would hope to get
>> some thorough testing before.
>
> This fixes the kernel crash on my mx6q board with a PCI switch, thanks!
>
> PCI Wifi card is also correctly detected.
Forgot to add:
Tested-by: Fabio Estevam <fabio.estevam@nxp.com>
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WARNING: multiple messages have this Message-ID (diff)
From: festevam@gmail.com (Fabio Estevam)
To: linux-arm-kernel@lists.infradead.org
Subject: [PATCH] PCI: imx6: fix downstream bus scanning
Date: Wed, 10 May 2017 16:04:47 -0300 [thread overview]
Message-ID: <CAOMZO5AnDRbuvp3G-ruM+1fo+9_JPCApRDQ9=kuDL0NZXgHmqA@mail.gmail.com> (raw)
In-Reply-To: <CAOMZO5BYXx9VmhGrTv44O-njGQsz=GSRp9fA_VbkWapkqY+p=g@mail.gmail.com>
On Wed, May 10, 2017 at 3:35 PM, Fabio Estevam <festevam@gmail.com> wrote:
> Hi Lucas,
>
> On Wed, May 10, 2017 at 2:57 PM, Lucas Stach <l.stach@pengutronix.de> wrote:
>> The change in Linux 4.12 to make PCI configuartion requests non-posted
>> means that we are now getting a synchronous abort when the CFG space
>> read to probe for downstream devices times out.
>>
>> Synchronous aborts need to be handled differently from the async aborts
>> we were getting before, in particular the PC needs to be advanced when
>> resolving the abort. This is mostly a copy of what other PCI drivers do
>> on ARM to handle those aborts.
>>
>> Signed-off-by: Lucas Stach <l.stach@pengutronix.de>
>> ---
>> This is a fix that needs to go in for 4.12, but I would hope to get
>> some thorough testing before.
>
> This fixes the kernel crash on my mx6q board with a PCI switch, thanks!
>
> PCI Wifi card is also correctly detected.
Forgot to add:
Tested-by: Fabio Estevam <fabio.estevam@nxp.com>
next prev parent reply other threads:[~2017-05-10 19:04 UTC|newest]
Thread overview: 18+ messages / expand[flat|nested] mbox.gz Atom feed top
2017-05-10 17:57 [PATCH] PCI: imx6: fix downstream bus scanning Lucas Stach
2017-05-10 17:57 ` Lucas Stach
2017-05-10 18:35 ` Fabio Estevam
2017-05-10 18:35 ` Fabio Estevam
2017-05-10 19:04 ` Fabio Estevam [this message]
2017-05-10 19:04 ` Fabio Estevam
2017-05-10 19:51 ` Peter Senna Tschudin
2017-05-10 19:51 ` Peter Senna Tschudin
2017-05-11 2:00 ` Richard Zhu
2017-05-11 2:00 ` Richard Zhu
2017-05-22 22:13 ` Bjorn Helgaas
2017-05-22 22:13 ` Bjorn Helgaas
2017-05-23 9:07 ` Lorenzo Pieralisi
2017-05-23 9:07 ` Lorenzo Pieralisi
2017-05-23 22:11 ` Fabio Estevam
2017-05-23 22:11 ` Fabio Estevam
2017-05-24 17:16 ` Bjorn Helgaas
2017-05-24 17:16 ` Bjorn Helgaas
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