target/linux/bcm53xx/patches-4.4/800-PCI-iproc-Ignore-ARM-core-aborts-when-running-on-bcm.patch

   1 From: =?UTF-8?q?Rafa=C5=82=20Mi=C5=82ecki?= <zajec5@gmail.com>
   2 Subject: [PATCH] PCI: iproc: Ignore ARM core aborts when running on bcma bus
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   6
   7 Northstar devices have host bridges that forward errors to the ARM core.
   8 These errors happen during PCI bus probing (device enumeration) and are
   9 expected. There is no reason for them to cause a die() so this patch
  10 adds a handler silencing them.
  11
  12 Signed-off-by: Rafał Miłecki <zajec5@gmail.com>
  13 ---
  14
  15 --- a/drivers/pci/host/pcie-iproc-bcma.c
  16 +++ b/drivers/pci/host/pcie-iproc-bcma.c
  17 @@ -40,6 +40,15 @@ static int iproc_pcie_bcma_map_irq(const
  18         return bcma_core_irq(bdev, 5);
  19  }
  20
  21 +static int iproc_pcie_bcma_abort_handler(unsigned long addr, unsigned int fsr,
  22 +                                        struct pt_regs *regs)
  23 +{
  24 +       if (fsr == 0x1406)
  25 +               return 0;
  26 +
  27 +       return 1;
  28 +}
  29 +
  30  static int iproc_pcie_bcma_probe(struct bcma_device *bdev)
  31  {
  32         struct iproc_pcie *pcie;
  33 @@ -65,6 +74,9 @@ static int iproc_pcie_bcma_probe(struct
  34
  35         pcie->map_irq = iproc_pcie_bcma_map_irq;
  36
  37 +       hook_fault_code(16 + 6, iproc_pcie_bcma_abort_handler, SIGBUS, BUS_OBJERR,
  38 +                       "imprecise external abort");
  39 +
  40         ret = iproc_pcie_setup(pcie, &res);
  41         if (ret)
  42                 dev_err(pcie->dev, "PCIe controller setup failed\n");