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Message-ID: <20180507213531.GB133147@bhelgaas-glaptop.roam.corp.google.com>
Date: Mon, 7 May 2018 16:35:31 -0500
From: Bjorn Helgaas <helgaas@...nel.org>
To: Sinan Kaya <okaya@...eaurora.org>
Cc: linux-pci@...r.kernel.org, timur@...eaurora.org,
sulrich@...eaurora.org, Keith Busch <keith.busch@...el.com>,
Kees Cook <keescook@...omium.org>,
linux-arm-msm@...r.kernel.org,
open list <linux-kernel@...r.kernel.org>,
stable@...r.kernel.org, Lukas Wunner <lukas@...ner.de>,
Greg Kroah-Hartman <gregkh@...uxfoundation.org>,
Bjorn Helgaas <bhelgaas@...gle.com>,
Mika Westerberg <mika.westerberg@...ux.intel.com>,
Markus Elfring <elfring@...rs.sourceforge.net>,
linux-arm-kernel@...ts.infradead.org
Subject: Re: [PATCH] PCI: pciehp: Add quirk for QDF2400 Command Completed
erratum
On Sun, May 06, 2018 at 06:30:53AM -0400, Sinan Kaya wrote:
> The QDF2400 controller does not set the Command Completed bit unless
> writes to the Slot Command register change "Control" bits. Command
> Completed is never set for writes that only change software notification
> "Enable" bits. This results in timeouts like this:
>
> pciehp 0000:00:00.0:pcie004: Timeout on hotplug command 0x1038
>
> Cc: stable@...r.kernel.org
> Signed-off-by: Sinan Kaya <okaya@...eaurora.org>
Since there's no bisection benefit for keeping these separate, I folded
this into the original quirk and added Mika's reviewed-by.
I also added the following ID patch and used PCI_VENDOR_ID_QCOM:
commit 333c8c1216c1e7ead6af7b3d667b43eb425b5034
Author: Bjorn Helgaas <bhelgaas@...gle.com>
Date: Mon May 7 15:52:55 2018 -0500
PCI: Add Qualcomm vendor ID
Add the Qualcomm vendor ID to pci_ids.h and use it in quirks.
Signed-off-by: Bjorn Helgaas <bhelgaas@...gle.com>
diff --git a/drivers/pci/quirks.c b/drivers/pci/quirks.c
index 2990ad1e7c99..e7bf44515fd6 100644
--- a/drivers/pci/quirks.c
+++ b/drivers/pci/quirks.c
@@ -4361,8 +4361,8 @@ static const struct pci_dev_acs_enabled {
{ PCI_VENDOR_ID_INTEL, 0x15b7, pci_quirk_mf_endpoint_acs },
{ PCI_VENDOR_ID_INTEL, 0x15b8, pci_quirk_mf_endpoint_acs },
/* QCOM QDF2xxx root ports */
- { 0x17cb, 0x400, pci_quirk_qcom_rp_acs },
- { 0x17cb, 0x401, pci_quirk_qcom_rp_acs },
+ { PCI_VENDOR_ID_QCOM, 0x0400, pci_quirk_qcom_rp_acs },
+ { PCI_VENDOR_ID_QCOM, 0x0401, pci_quirk_qcom_rp_acs },
/* Intel PCH root ports */
{ PCI_VENDOR_ID_INTEL, PCI_ANY_ID, pci_quirk_intel_pch_acs },
{ PCI_VENDOR_ID_INTEL, PCI_ANY_ID, pci_quirk_intel_spt_pch_acs },
diff --git a/include/linux/pci_ids.h b/include/linux/pci_ids.h
index cc608fc55334..883cb7bf78aa 100644
--- a/include/linux/pci_ids.h
+++ b/include/linux/pci_ids.h
@@ -2387,6 +2387,8 @@
#define PCI_VENDOR_ID_LENOVO 0x17aa
+#define PCI_VENDOR_ID_QCOM 0x17cb
+
#define PCI_VENDOR_ID_CDNS 0x17cd
#define PCI_VENDOR_ID_ARECA 0x17d3
> ---
> drivers/pci/hotplug/pciehp_hpc.c | 6 ++++++
> 1 file changed, 6 insertions(+)
>
> diff --git a/drivers/pci/hotplug/pciehp_hpc.c b/drivers/pci/hotplug/pciehp_hpc.c
> index e70eba5..974a8f1 100644
> --- a/drivers/pci/hotplug/pciehp_hpc.c
> +++ b/drivers/pci/hotplug/pciehp_hpc.c
> @@ -914,3 +914,9 @@ static void quirk_cmd_compl(struct pci_dev *pdev)
> }
> DECLARE_PCI_FIXUP_CLASS_EARLY(PCI_VENDOR_ID_INTEL, PCI_ANY_ID,
> PCI_CLASS_BRIDGE_PCI, 8, quirk_cmd_compl);
> +
> +DECLARE_PCI_FIXUP_CLASS_EARLY(0x17cb, 0x400,
> + PCI_CLASS_BRIDGE_PCI, 8, quirk_cmd_compl);
> +
> +DECLARE_PCI_FIXUP_CLASS_EARLY(0x17cb, 0x401,
> + PCI_CLASS_BRIDGE_PCI, 8, quirk_cmd_compl);
> --
> 2.7.4
>
>
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> linux-arm-kernel@...ts.infradead.org
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