target/linux/layerscape/patches-5.4/812-pcie-0005-MLK-20684-PCI-Disable-MSI-on-CYW4356-and-CYW4359-chi.patch

   1 From 852d91023cc24663e6b3b0707e98a189a7b1de87 Mon Sep 17 00:00:00 2001
   2 From: Andy Duan <fugang.duan@nxp.com>
   3 Date: Wed, 2 Jan 2019 17:55:44 +0800
   4 Subject: [PATCH] MLK-20684 PCI: Disable MSI on CYW4356 and CYW4359 chips
   5
   6 MSI is broken on CYW4356/4359 chips. This causes CYW4356 1CX not
   7 work on i.MX8x platforms with bandwidth test. It is known issue
   8 that i.MX8x PCIe host driver MSI interrupt lost.
   9
  10 Disable MSI completely for this chipset to let wifi can stable work
  11 until PCIe RC driver fix the issue.
  12
  13 Reviewed-by: Richard Zhu <hongxing.zhu@nxp.com>
  14 Signed-off-by: Fugang Duan <fugang.duan@nxp.com>
  15 (cherry picked from commit d99766187fb99d4a6655a1e0fdf5dc9451a8e4a0)
  16 ---
  17  drivers/pci/quirks.c | 2 ++
  18  1 file changed, 2 insertions(+)
  19
  20 --- a/drivers/pci/quirks.c
  21 +++ b/drivers/pci/quirks.c
  22 @@ -2523,6 +2523,8 @@ DECLARE_PCI_FIXUP_FINAL(PCI_VENDOR_ID_VI
  23  DECLARE_PCI_FIXUP_FINAL(PCI_VENDOR_ID_VIA, PCI_DEVICE_ID_VIA_VT3364, quirk_disable_all_msi);
  24  DECLARE_PCI_FIXUP_FINAL(PCI_VENDOR_ID_VIA, PCI_DEVICE_ID_VIA_8380_0, quirk_disable_all_msi);
  25  DECLARE_PCI_FIXUP_FINAL(PCI_VENDOR_ID_SI, 0x0761, quirk_disable_all_msi);
  26 +DECLARE_PCI_FIXUP_EARLY(PCI_VENDOR_ID_BROADCOM, 0x43ec, quirk_disable_all_msi);
  27 +DECLARE_PCI_FIXUP_EARLY(PCI_VENDOR_ID_BROADCOM, 0x43ef, quirk_disable_all_msi);
  28
  29  /* Disable MSI on chipsets that are known to not support it */
  30  static void quirk_disable_msi(struct pci_dev *dev)