812-pcie-0005-MLK-20684-PCI-Disable-MSI-on-CYW4356-and-CYW4359-chi.patch

From 852d91023cc24663e6b3b0707e98a189a7b1de87 Mon Sep 17 00:00:00 2001
From: Andy Duan <fugang.duan@nxp.com>
Date: Wed, 2 Jan 2019 17:55:44 +0800
Subject: [PATCH] MLK-20684 PCI: Disable MSI on CYW4356 and CYW4359 chips

MSI is broken on CYW4356/4359 chips. This causes CYW4356 1CX not
work on i.MX8x platforms with bandwidth test. It is known issue
that i.MX8x PCIe host driver MSI interrupt lost.

Disable MSI completely for this chipset to let wifi can stable work
until PCIe RC driver fix the issue.

Reviewed-by: Richard Zhu <hongxing.zhu@nxp.com>
Signed-off-by: Fugang Duan <fugang.duan@nxp.com>
(cherry picked from commit d99766187fb99d4a6655a1e0fdf5dc9451a8e4a0)
---
 drivers/pci/quirks.c | 2 ++
 1 file changed, 2 insertions(+)

--- a/drivers/pci/quirks.c
+++ b/drivers/pci/quirks.c
@@ -2510,6 +2510,8 @@ DECLARE_PCI_FIXUP_FINAL(PCI_VENDOR_ID_VI
 DECLARE_PCI_FIXUP_FINAL(PCI_VENDOR_ID_VIA, PCI_DEVICE_ID_VIA_VT3364, quirk_disable_all_msi);
 DECLARE_PCI_FIXUP_FINAL(PCI_VENDOR_ID_VIA, PCI_DEVICE_ID_VIA_8380_0, quirk_disable_all_msi);
 DECLARE_PCI_FIXUP_FINAL(PCI_VENDOR_ID_SI, 0x0761, quirk_disable_all_msi);
+DECLARE_PCI_FIXUP_EARLY(PCI_VENDOR_ID_BROADCOM, 0x43ec, quirk_disable_all_msi);
+DECLARE_PCI_FIXUP_EARLY(PCI_VENDOR_ID_BROADCOM, 0x43ef, quirk_disable_all_msi);
 
 /* Disable MSI on chipsets that are known to not support it */
 static void quirk_disable_msi(struct pci_dev *dev)