From: Liwei Song <liwei.s...@windriver.com> This is a follow up to commit f712c71f7b2b ("ACPI, APEI: Fixup common access width firmware bug") fix the following firmware bug:
[Firmware Bug]: APEI: Invalid bit width + offset in GAR [0xb2/16/0/1/1] This is due to an 8-bit access width is specified for a 16-bit register, Do bit_width check just like what the original commit have done. Signed-off-by: Liwei Song <liwei.s...@windriver.com> --- drivers/acpi/apei/apei-base.c | 3 +++ 1 file changed, 3 insertions(+) diff --git a/drivers/acpi/apei/apei-base.c b/drivers/acpi/apei/apei-base.c index da370e1..7e47bc6 100644 --- a/drivers/acpi/apei/apei-base.c +++ b/drivers/acpi/apei/apei-base.c @@ -610,6 +610,9 @@ static int apei_check_gar(struct acpi_generic_address *reg, u64 *paddr, else if (bit_width == 64 && bit_offset == 0 && (*paddr & 0x07) == 0 && *access_bit_width < 64) *access_bit_width = 64; + else if (bit_width == 16 && bit_offset == 0 && (*paddr & 0x01) == 0 && + *access_bit_width < 16) + *access_bit_width = 16; if ((bit_width + bit_offset) > *access_bit_width) { pr_warning(FW_BUG APEI_PFX -- 2.7.4