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authorLans Zhang <jia.zhang@windriver.com>2013-01-16 09:03:29 +0000
committerRafael J. Wysocki <rafael.j.wysocki@intel.com>2013-01-19 01:34:43 +0100
commit25216865392a6e1f3032855aee7407de1fe0b70c (patch)
tree7f0f7575967c0ff85464b7540ba9ba1afe3b797c /drivers/acpi
parentf427e5f1cf75bba84cccdac1d8a90552d9ae1065 (diff)
downloadop-kernel-dev-25216865392a6e1f3032855aee7407de1fe0b70c.zip
op-kernel-dev-25216865392a6e1f3032855aee7407de1fe0b70c.tar.gz
ACPI, APEI: Fixup incorrect 64-bit access width firmware bug
The bit width check was introduced by 15afae60 (ACPI, APEI: Fix incorrect APEI register bit width check and usage), and a fixup for incorrect 32-bit width memory address was given by f712c71 (ACPI, APEI: Fixup common access width firmware bug). Now there is a similar symptom: [Firmware Bug]: APEI: Invalid bit width + offset in GAR [0x12345000/64/0/3/0] Another bogus BIOS reports an incorrect 64-bit width in trigger table. Thus, apply to a similar workaround for 64-bit width memory address. Signed-off-by: Lans Zhang <jia.zhang@windriver.com> Acked-by: Gary Hade <garyhade@us.ibm.com> Acked-by: Myron Stowe <myron.stowe@redhat.com> Acked-by: Jean Delvare <jdelvare@suse.de> Signed-off-by: Rafael J. Wysocki <rafael.j.wysocki@intel.com>
Diffstat (limited to 'drivers/acpi')
-rw-r--r--drivers/acpi/apei/apei-base.c3
1 files changed, 3 insertions, 0 deletions
diff --git a/drivers/acpi/apei/apei-base.c b/drivers/acpi/apei/apei-base.c
index 00a7836..46f80e2 100644
--- a/drivers/acpi/apei/apei-base.c
+++ b/drivers/acpi/apei/apei-base.c
@@ -590,6 +590,9 @@ static int apei_check_gar(struct acpi_generic_address *reg, u64 *paddr,
if (bit_width == 32 && bit_offset == 0 && (*paddr & 0x03) == 0 &&
*access_bit_width < 32)
*access_bit_width = 32;
+ else if (bit_width == 64 && bit_offset == 0 && (*paddr & 0x07) == 0 &&
+ *access_bit_width < 64)
+ *access_bit_width = 64;
if ((bit_width + bit_offset) > *access_bit_width) {
pr_warning(FW_BUG APEI_PFX
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