linux-kernel - Re: [PATCH v1 2/2] PCI: shpchp: Fix AMD POGO identification

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Message-ID: <CAJZ5v0hHHR_559P1vF+9g_vmKkPSWjm9pv5zmjBq9qQ7vDhjOg@mail.gmail.com>
Date:   Sun, 3 Jun 2018 09:59:18 +0200
From:   "Rafael J. Wysocki" <rafael@...nel.org>
To:     Bjorn Helgaas <helgaas@...nel.org>
Cc:     Linux PCI <linux-pci@...r.kernel.org>,
        Linux Kernel Mailing List <linux-kernel@...r.kernel.org>,
        ACPI Devel Maling List <linux-acpi@...r.kernel.org>,
        Mika Westerberg <mika.westerberg@...ux.intel.com>,
        "Rafael J . Wysocki" <rjw@...ysocki.net>,
        Len Brown <lenb@...nel.org>,
        Mario Limonciello <Mario.Limonciello@...l.com>,
        Michael Jamet <michael.jamet@...el.com>,
        Yehezkel Bernat <YehezkelShB@...il.com>,
        Andy Shevchenko <andriy.shevchenko@...ux.intel.com>,
        Lukas Wunner <lukas@...ner.de>
Subject: Re: [PATCH v1 2/2] PCI: shpchp: Fix AMD POGO identification

On Sat, Jun 2, 2018 at 7:42 AM, Bjorn Helgaas <helgaas@...nel.org> wrote:
> From: Bjorn Helgaas <bhelgaas@...gle.com>
>
> The fix for an AMD POGO erratum related to SHPC incorrectly identified the
> device.  The workaround should be applied only for AMD POGO devices, but it
> was instead applied to:
>
>   - all AMD bridges, and
>   - all devices from any vendor with device ID 0x7458
>
> Fixes: 53044f357448 ("[PATCH] PCI Hotplug: shpchp: AMD POGO errata fix")
> Signed-off-by: Bjorn Helgaas <bhelgaas@...gle.com>

Reviewed-by: Rafael J. Wysocki <rafael.j.wysocki@...el.com>

> ---
>  drivers/pci/hotplug/shpchp_ctrl.c |    8 ++++----
>  1 file changed, 4 insertions(+), 4 deletions(-)
>
> diff --git a/drivers/pci/hotplug/shpchp_ctrl.c b/drivers/pci/hotplug/shpchp_ctrl.c
> index bedda5bda910..1047b56e5730 100644
> --- a/drivers/pci/hotplug/shpchp_ctrl.c
> +++ b/drivers/pci/hotplug/shpchp_ctrl.c
> @@ -585,13 +585,13 @@ static int shpchp_enable_slot (struct slot *p_slot)
>         ctrl_dbg(ctrl, "%s: p_slot->pwr_save %x\n", __func__, p_slot->pwr_save);
>         p_slot->hpc_ops->get_latch_status(p_slot, &getstatus);
>
> -       if (((p_slot->ctrl->pci_dev->vendor == PCI_VENDOR_ID_AMD) ||
> -           (p_slot->ctrl->pci_dev->device == PCI_DEVICE_ID_AMD_POGO_7458))
> +       if ((p_slot->ctrl->pci_dev->vendor == PCI_VENDOR_ID_AMD &&
> +            p_slot->ctrl->pci_dev->device == PCI_DEVICE_ID_AMD_POGO_7458)
>              && p_slot->ctrl->num_slots == 1) {
> -               /* handle amd pogo errata; this must be done before enable  */
> +               /* handle AMD POGO errata; this must be done before enable  */
>                 amd_pogo_errata_save_misc_reg(p_slot);
>                 retval = board_added(p_slot);
> -               /* handle amd pogo errata; this must be done after enable  */
> +               /* handle AMD POGO errata; this must be done after enable  */
>                 amd_pogo_errata_restore_misc_reg(p_slot);
>         } else
>                 retval = board_added(p_slot);
>
> --
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