linux-kernel - [tip: irq/urgent] PCI: Add MSI masking quirk for Nvidia ION AHCI

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Date:   Thu, 11 Nov 2021 08:57:47 -0000
From:   "tip-bot2 for Marc Zyngier" <tip-bot2@...utronix.de>
To:     linux-tip-commits@...r.kernel.org
Cc:     Rui Salvaterra <rsalvaterra@...il.com>,
        Marc Zyngier <maz@...nel.org>,
        Thomas Gleixner <tglx@...utronix.de>,
        Bjorn Helgaas <helgaas@...nel.org>, x86@...nel.org,
        linux-kernel@...r.kernel.org
Subject: [tip: irq/urgent] PCI: Add MSI masking quirk for Nvidia ION AHCI

The following commit has been merged into the irq/urgent branch of tip:

Commit-ID:     f21082fb20dbfb3e42b769b59ef21c2a7f2c7c1f
Gitweb:        https://git.kernel.org/tip/f21082fb20dbfb3e42b769b59ef21c2a7f2c7c1f
Author:        Marc Zyngier <maz@...nel.org>
AuthorDate:    Thu, 04 Nov 2021 18:01:30 
Committer:     Thomas Gleixner <tglx@...utronix.de>
CommitterDate: Thu, 11 Nov 2021 09:50:31 +01:00

PCI: Add MSI masking quirk for Nvidia ION AHCI

The ION AHCI device pretends that MSI masking isn't a thing, while it
actually implements it and needs MSIs to be unmasked to work. Add a quirk
to that effect.

Reported-by: Rui Salvaterra <rsalvaterra@...il.com>
Signed-off-by: Marc Zyngier <maz@...nel.org>
Signed-off-by: Thomas Gleixner <tglx@...utronix.de>
Tested-by: Rui Salvaterra <rsalvaterra@...il.com>
Reviewed-by: Thomas Gleixner <tglx@...utronix.de>
Cc: Bjorn Helgaas <helgaas@...nel.org>
Link: https://lore.kernel.org/r/CALjTZvbzYfBuLB+H=fj2J+9=DxjQ2Uqcy0if_PvmJ-nU-qEgkg@mail.gmail.com
Link: https://lore.kernel.org/r/20211104180130.3825416-3-maz@kernel.org
---
 drivers/pci/quirks.c | 6 ++++++
 1 file changed, 6 insertions(+)

diff --git a/drivers/pci/quirks.c b/drivers/pci/quirks.c
index aedb78c..003950c 100644
--- a/drivers/pci/quirks.c
+++ b/drivers/pci/quirks.c
@@ -5851,3 +5851,9 @@ DECLARE_PCI_FIXUP_ENABLE(PCI_VENDOR_ID_PERICOM, 0x2303,
 			 pci_fixup_pericom_acs_store_forward);
 DECLARE_PCI_FIXUP_RESUME(PCI_VENDOR_ID_PERICOM, 0x2303,
 			 pci_fixup_pericom_acs_store_forward);
+
+static void nvidia_ion_ahci_fixup(struct pci_dev *pdev)
+{
+	pdev->dev_flags |= PCI_DEV_FLAGS_HAS_MSI_MASKING;
+}
+DECLARE_PCI_FIXUP_FINAL(PCI_VENDOR_ID_NVIDIA, 0x0ab8, nvidia_ion_ahci_fixup);