From: Lukas Wunner lukas@wunner.de
[ 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@wunner.de Signed-off-by: Ard Biesheuvel ard.biesheuvel@linaro.org Cc: Ben Dooks ben.dooks@codethink.co.uk Cc: Dave Young dyoung@redhat.com Cc: Jarkko Sakkinen jarkko.sakkinen@linux.intel.com Cc: Jerry Snitselaar jsnitsel@redhat.com Cc: Linus Torvalds torvalds@linux-foundation.org Cc: Lyude Paul lyude@redhat.com Cc: Matthew Garrett mjg59@google.com Cc: Octavian Purdila octavian.purdila@intel.com Cc: Peter Jones pjones@redhat.com Cc: Peter Zijlstra peterz@infradead.org Cc: Scott Talbert swt@techie.net Cc: Thomas Gleixner tglx@linutronix.de Cc: linux-efi@vger.kernel.org Cc: linux-integrity@vger.kernel.org Link: https://lkml.kernel.org/r/20191002165904.8819-2-ard.biesheuvel@linaro.org Signed-off-by: Ingo Molnar mingo@kernel.org Signed-off-by: Sasha Levin sashal@kernel.org --- 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 f40f7df4b7344..c0e54396f2502 100644 --- a/drivers/firmware/efi/cper.c +++ b/drivers/firmware/efi/cper.c @@ -375,7 +375,7 @@ 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,