The CPER parser assumes that the class code is big endian, but at least
on this edk2-derived Intel Purley platform it's little endian:
efi: EFI v2.50 by EDK II BIOS ID:PLYDCRB1.86B.0119.R05.1701181843
DMI: Intel Corporation PURLEY/PURLEY, BIOS PLYDCRB1.86B.0119.R05.1701181843 01/18/2017
{1}[Hardware Error]: device_id: 0000:5d:00.0
{1}[Hardware Error]: slot: 0
{1}[Hardware Error]: secondary_bus: 0x5e
{1}[Hardware Error]: vendor_id: 0x8086, device_id: 0x2030
{1}[Hardware Error]: class_code: 000406
^^^^^^ (should be 060400)
Cc: Huang Ying <ying.huang@xxxxxxxxx>
Cc: Ashok Raj <ashok.raj@xxxxxxxxx>
Signed-off-by: Lukas Wunner <lukas@xxxxxxxxx>
---
@Ashok Raj: Could you test if this patch results in the correct
PCI class being logged? Thanks!
drivers/firmware/efi/cper.c | 5 ++---
include/linux/cper.h | 2 +-
2 files changed, 3 insertions(+), 4 deletions(-)
diff --git a/drivers/firmware/efi/cper.c b/drivers/firmware/efi/cper.c
index d42537425438..e360c8b77bd9 100644
--- a/drivers/firmware/efi/cper.c
+++ b/drivers/firmware/efi/cper.c
@@ -364,7 +364,6 @@ static void cper_print_pcie(const char *pfx, const struct cper_sec_pcie *pcie,
printk("%s""command: 0x%04x, status: 0x%04x\n", pfx,
pcie->command, pcie->status);
if (pcie->validation_bits & CPER_PCIE_VALID_DEVICE_ID) {
- const __u8 *p;
printk("%s""device_id: %04x:%02x:%02x.%x\n", pfx,
pcie->device_id.segment, pcie->device_id.bus,
pcie->device_id.device, pcie->device_id.function);
@@ -374,8 +373,8 @@ static void cper_print_pcie(const char *pfx, const struct cper_sec_pcie *pcie,
pcie->device_id.secondary_bus);
printk("%s""vendor_id: 0x%04x, device_id: 0x%04x\n", pfx,
pcie->device_id.vendor_id, pcie->device_id.device_id);
- p = pcie->device_id.class_code;
- printk("%s""class_code: %02x%02x%02x\n", pfx, p[0], p[1], p[2]);
+ printk("%s""class_code: 0x%06x\n", pfx,
+ pcie->device_id.class_code);
}
if (pcie->validation_bits & CPER_PCIE_VALID_SERIAL_NUMBER)
printk("%s""serial number: 0x%04x, 0x%04x\n", pfx,
diff --git a/include/linux/cper.h b/include/linux/cper.h
index dcacb1a72e26..fbfb50f52362 100644
--- a/include/linux/cper.h
+++ b/include/linux/cper.h
@@ -416,7 +416,7 @@ struct cper_sec_pcie {
struct {
__u16 vendor_id;
__u16 device_id;
- __u8 class_code[3];
+ __u32 class_code:24;
__u8 function;
__u8 device;
__u16 segment;
--
2.11.0
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