From: Marc Zyngier <maz@kernel.org>
Date: Thu, 4 Nov 2021 18:01:30 +0000 (+0000)
Subject: PCI: Add MSI masking quirk for Nvidia ION AHCI
X-Git-Tag: v5.10.88~677
X-Git-Url: http://review.tizen.org/git/?a=commitdiff_plain;h=5bf5f464831c26dca627bf32d4e51067dcd39d64;p=platform%2Fkernel%2Flinux-rpi.git

PCI: Add MSI masking quirk for Nvidia ION AHCI

commit f21082fb20dbfb3e42b769b59ef21c2a7f2c7c1f upstream.

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@gmail.com>
Signed-off-by: Marc Zyngier <maz@kernel.org>
Signed-off-by: Thomas Gleixner <tglx@linutronix.de>
Tested-by: Rui Salvaterra <rsalvaterra@gmail.com>
Reviewed-by: Thomas Gleixner <tglx@linutronix.de>
Cc: Bjorn Helgaas <helgaas@kernel.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
Signed-off-by: Greg Kroah-Hartman <gregkh@linuxfoundation.org>
---

diff --git a/drivers/pci/quirks.c b/drivers/pci/quirks.c
index fb91b2d..bb863dd 100644
--- a/drivers/pci/quirks.c
+++ b/drivers/pci/quirks.c
@@ -5756,3 +5756,9 @@ static void apex_pci_fixup_class(struct pci_dev *pdev)
 }
 DECLARE_PCI_FIXUP_CLASS_HEADER(0x1ac1, 0x089a,
 			       PCI_CLASS_NOT_DEFINED, 8, apex_pci_fixup_class);
+
+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);