From: Lukas Wunner <lukas@xxxxxxxxx>
[ Upstream commit 6fb9367a15d1a126d222d738b2702c7958594a5f ]
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)
Signed-off-by: Lukas Wunner <lukas@xxxxxxxxx>
Signed-off-by: Ard Biesheuvel <ard.biesheuvel@xxxxxxxxxx>
Cc: Ben Dooks <ben.dooks@xxxxxxxxxxxxxxx>
Cc: Dave Young <dyoung@xxxxxxxxxx>
Cc: Jarkko Sakkinen <jarkko.sakkinen@xxxxxxxxxxxxxxx>
Cc: Jerry Snitselaar <jsnitsel@xxxxxxxxxx>
Cc: Linus Torvalds <torvalds@xxxxxxxxxxxxxxxxxxxx>
Cc: Lyude Paul <lyude@xxxxxxxxxx>
Cc: Matthew Garrett <mjg59@xxxxxxxxxx>
Cc: Octavian Purdila <octavian.purdila@xxxxxxxxx>
Cc: Peter Jones <pjones@xxxxxxxxxx>
Cc: Peter Zijlstra <peterz@xxxxxxxxxxxxx>
Cc: Scott Talbert <swt@xxxxxxxxxx>
Cc: Thomas Gleixner <tglx@xxxxxxxxxxxxx>
Cc: linux-efi@xxxxxxxxxxxxxxx
Cc: linux-integrity@xxxxxxxxxxxxxxx
Link: https://lkml.kernel.org/r/20191002165904.8819-2-ard.biesheuvel@xxxxxxxxxx
Signed-off-by: Ingo Molnar <mingo@xxxxxxxxxx>
Signed-off-by: Sasha Levin <sashal@xxxxxxxxxx>
---
drivers/firmware/efi/cper.c | 2 +-
1 file changed, 1 insertion(+), 1 deletion(-)
diff --git a/drivers/firmware/efi/cper.c b/drivers/firmware/efi/cper.c
index db404aab82b2a..209dc5aefc310 100644
--- a/drivers/firmware/efi/cper.c
+++ b/drivers/firmware/efi/cper.c
@@ -498,7 +498,7 @@ static void cper_print_pcie(const char *pfx, const struct cper_sec_pcie *pcie,
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: %02x%02x%02x\n", pfx, p[2], p[1], p[0]);
}
if (pcie->validation_bits & CPER_PCIE_VALID_SERIAL_NUMBER)
printk("%s""serial number: 0x%04x, 0x%04x\n", pfx,
--
2.20.1
