Ping :)

在 2019/1/3 15:38, Dongdong Liu 写道:

Current info->severity have not assigned a value before calling aer_get_device_error_info() and aer_get_device_error_info(), Fix the bug to get the severity by reading the port's AER status, mask and severity registers. At the same time, add code to clear the port's fatal errors.

Fixes: 8aefa9b0d910 ("PCI/DPC: Print AER status in DPC event handling") Signed-off-by: Dongdong Liu liudongdong3@huawei.com Cc: stable@vger.kernel.org # 4.19+

---

drivers/pci/pcie/dpc.c | 27 ++++++++++++++++++++++++++- 1 file changed, 26 insertions(+), 1 deletion(-)

diff --git a/drivers/pci/pcie/dpc.c b/drivers/pci/pcie/dpc.c index e435d12..7b77754 100644 --- a/drivers/pci/pcie/dpc.c +++ b/drivers/pci/pcie/dpc.c @@ -202,6 +202,28 @@ static void dpc_process_rp_pio_error(struct dpc_dev *dpc) pci_write_config_dword(pdev, cap + PCI_EXP_DPC_RP_PIO_STATUS, status); }

+static int dpc_get_aer_uncorrect_severity(struct pci_dev *dev,

• 			  struct aer_err_info *info)
  

+{

• int pos = dev->aer_cap;
• u32 status, mask, sev;
• pci_read_config_dword(dev, pos + PCI_ERR_UNCOR_STATUS, &status);
• pci_read_config_dword(dev, pos + PCI_ERR_UNCOR_MASK, &mask);
• status &= ~mask;
• if (!status)

• return 0;
  

• pci_read_config_dword(dev, pos + PCI_ERR_UNCOR_SEVER, &sev);
• status &= sev;
• if (status)

• info->severity = AER_FATAL;
  

• else

• info->severity = AER_NONFATAL;
  

• return 1;

+}

static irqreturn_t dpc_handler(int irq, void *context) { struct aer_err_info info; @@ -229,9 +251,12 @@ static irqreturn_t dpc_handler(int irq, void *context) /* show RP PIO error detail information */ if (dpc->rp_extensions && reason == 3 && ext_reason == 0) dpc_process_rp_pio_error(dpc);

• else if (reason == 0 && aer_get_device_error_info(pdev, &info)) {

• else if (reason == 0 &&

•  dpc_get_aer_uncorrect_severity(pdev, &info) &&
  

•  aer_get_device_error_info(pdev, &info)) {
  

  aer_print_error(pdev, &info); pci_cleanup_aer_uncorrect_error_status(pdev);

• pci_aer_clear_fatal_status(pdev);
  

  }

  /* We configure DPC so it only triggers on ERR_FATAL */