[PATCH] PCI: disable nv_msi_ht_cap_quirk_leaf quirk on arm/arm64

From: Nicolas Chauvet <kwizart@gmail.com>
To: Thierry Reding <thierry.reding@gmail.com>,
	Jonathan Hunter <jonathanh@nvidia.com>,
	Manikanta Maddireddy <mmaddireddy@nvidia.com>,
	Bjorn Helgaas <helgaas@kernel.org>,
	Lorenzo Pieralisi <lorenzo.pieralisi@arm.com>
Cc: linux-tegra@vger.kernel.org, linux-pci@vger.kernel.org,
	Nicolas Chauvet <kwizart@gmail.com>
Subject: [PATCH] PCI: disable nv_msi_ht_cap_quirk_leaf quirk on arm/arm64
Date: Mon, 15 Apr 2019 11:25:37 +0200	[thread overview]
Message-ID: <20190415092537.14305-1-kwizart@gmail.com> (raw)
In-Reply-To: <20180730094213.11973-1-kwizart@gmail.com>

This patch disable the use of nv_msi_ht_cap_quirk_leaf quirk on arm and
arm64 NVIDIA devices such as Tegra

This fixes the following output:
"pci 0000:00:01.0: nv_msi_ht_cap_quirk didn't locate host bridge"
as experienced on a Trimslice device with PCI host bridge enabled

v3: exclude the quirk for arm and arm64 instead of only for x86

v2: use __maybe_unused to avoid a warning on nv_msi_ht_cap_quirk_leaf

Signed-off-by: Nicolas Chauvet <kwizart@gmail.com>
Reviewed-by: Manikanta Maddireddy <mmaddireddy@nvidia.com>
Acked-by: Thierry Reding <treding@nvidia.com>
---
 drivers/pci/quirks.c | 5 ++++-
 1 file changed, 4 insertions(+), 1 deletion(-)

diff --git a/drivers/pci/quirks.c b/drivers/pci/quirks.c
index a59ad09ce911..1ac65f09d7ee 100644
--- a/drivers/pci/quirks.c
+++ b/drivers/pci/quirks.c
@@ -2811,12 +2811,15 @@ static void nv_msi_ht_cap_quirk_all(struct pci_dev *dev)
 DECLARE_PCI_FIXUP_FINAL(PCI_VENDOR_ID_AL, PCI_ANY_ID, nv_msi_ht_cap_quirk_all);
 DECLARE_PCI_FIXUP_RESUME_EARLY(PCI_VENDOR_ID_AL, PCI_ANY_ID, nv_msi_ht_cap_quirk_all);
 
-static void nv_msi_ht_cap_quirk_leaf(struct pci_dev *dev)
+static void __maybe_unused nv_msi_ht_cap_quirk_leaf(struct pci_dev *dev)
 {
 	return __nv_msi_ht_cap_quirk(dev, 0);
 }
+/* HyperTransport is not relevant on theses arches */
+#if !IS_ENABLED(CONFIG_ARM) && !IS_ENABLED(CONFIG_ARM64)
 DECLARE_PCI_FIXUP_FINAL(PCI_VENDOR_ID_NVIDIA, PCI_ANY_ID, nv_msi_ht_cap_quirk_leaf);
 DECLARE_PCI_FIXUP_RESUME_EARLY(PCI_VENDOR_ID_NVIDIA, PCI_ANY_ID, nv_msi_ht_cap_quirk_leaf);
+#endif
 
 static void quirk_msi_intx_disable_bug(struct pci_dev *dev)
 {
-- 
2.17.2

