[PATCH v1 1/2] PCI/AER: Decode Error Source Requester ID

[Bjorn Helgaas]

From: Bjorn Helgaas <bhelg...@google.com>

Decode the Requester ID from the AER Error Source Register into domain/
bus/device/function format to match other logging.  In cases where the ID
matches the device used for pci_err(), drop the extra ID completely so we
don't print it twice.

Signed-off-by: Bjorn Helgaas <bhelg...@google.com>
---
 drivers/pci/pcie/aer/aerdrv_errprint.c |   18 +++++++++++-------
 1 file changed, 11 insertions(+), 7 deletions(-)

diff --git a/drivers/pci/pcie/aer/aerdrv_errprint.c 
b/drivers/pci/pcie/aer/aerdrv_errprint.c
index 21ca5e1b0ded..d7fde8368d81 100644
--- a/drivers/pci/pcie/aer/aerdrv_errprint.c
+++ b/drivers/pci/pcie/aer/aerdrv_errprint.c
@@ -163,17 +163,17 @@ void aer_print_error(struct pci_dev *dev, struct 
aer_err_info *info)
        int id = ((dev->bus->number << 8) | dev->devfn);
 
        if (!info->status) {
-               pci_err(dev, "PCIe Bus Error: severity=%s, type=Unaccessible, 
id=%04x(Unregistered Agent ID)\n",
-                       aer_error_severity_string[info->severity], id);
+               pci_err(dev, "PCIe Bus Error: severity=%s, type=Inaccessible, 
(Unregistered Agent ID)\n",
+                       aer_error_severity_string[info->severity]);
                goto out;
        }
 
        layer = AER_GET_LAYER_ERROR(info->severity, info->status);
        agent = AER_GET_AGENT(info->severity, info->status);
 
-       pci_err(dev, "PCIe Bus Error: severity=%s, type=%s, id=%04x(%s)\n",
+       pci_err(dev, "PCIe Bus Error: severity=%s, type=%s, (%s)\n",
                aer_error_severity_string[info->severity],
-               aer_error_layer[layer], id, aer_agent_string[agent]);
+               aer_error_layer[layer], aer_agent_string[agent]);
 
        pci_err(dev, "  device [%04x:%04x] error status/mask=%08x/%08x\n",
                dev->vendor, dev->device,
@@ -186,7 +186,7 @@ void aer_print_error(struct pci_dev *dev, struct 
aer_err_info *info)
 
 out:
        if (info->id && info->error_dev_num > 1 && info->id == id)
-               pci_err(dev, "  Error of this Agent(%04x) is reported first\n", 
id);
+               pci_err(dev, "  Error of this Agent is reported first\n");
 
        trace_aer_event(dev_name(&dev->dev), (info->status & ~info->mask),
                        info->severity, info->tlp_header_valid, &info->tlp);
@@ -194,9 +194,13 @@ void aer_print_error(struct pci_dev *dev, struct 
aer_err_info *info)
 
 void aer_print_port_info(struct pci_dev *dev, struct aer_err_info *info)
 {
-       pci_info(dev, "AER: %s%s error received: id=%04x\n",
+       u8 bus = info->id >> 8;
+       u8 devfn = info->id & 0xff;
+
+       pci_info(dev, "AER: %s%s error received: %04x:%02x:%02x.%d\n",
                info->multi_error_valid ? "Multiple " : "",
-               aer_error_severity_string[info->severity], info->id);
+               aer_error_severity_string[info->severity],
+               pci_domain_nr(dev->bus), bus, devfn >> 3, devfn & 0x7);
 }
 
 #ifdef CONFIG_ACPI_APEI_PCIEAER