[PATCH 01/17] ACPI, APEI, HEST, Detect duplicated hardware error source ID

Huang Ying
2011-07-13T05:14:33Z

The firmware on some machine will report duplicated hardware error
source ID in HEST. This is considered a firmware bug. To provide
better warning message, this patch adds duplicated hardware error
source ID detecting and corresponding printk.

This patch fixes #37412 on kernel bugzilla:
https://bugzilla.kernel.org/show_bug.cgi?id=37412

Reported-by: marconifabio@ubuntu-it.org
Signed-off-by: Huang Ying <ying.huang@intel.com>
Tested-by: Mathias <janedo.spam@gmail.com>
---
drivers/acpi/apei/hest.c | 12 +++++++++++-
1 file changed, 11 insertions(+), 1 deletion(-)

--- a/drivers/acpi/apei/hest.c
+++ b/drivers/acpi/apei/hest.c
@@ -139,13 +139,23 @@ static int __init hest_parse_ghes(struct
{
struct platform_device *ghes_dev;
struct ghes_arr *ghes_arr = data;
- int rc;
+ int rc, i;

if (hest_hdr->type != ACPI_HEST_TYPE_GENERIC_ERROR)
return 0;

if (!((struct acpi_hest_generic *)hest_hdr)->enabled)
return 0;
+ for (i = 0; i < ghes_arr->count; i++) {
+ struct acpi_hest_header *hdr;
+ ghes_dev = ghes_arr->ghes_devs[i];
+ hdr = *(struct acpi_hest_header **)ghes_dev->dev.platform_data;
+ if (hdr->source_id == hest_hdr->source_id) {
+ pr_warning(FW_WARN HEST_PFX "Duplicated hardware error source ID: %d.\n",
+ hdr->source_id);
+ return -EIO;
+ }
+ }
ghes_dev = platform_device_alloc("GHES", hest_hdr->source_id);
if (!ghes_dev)
return -ENOMEM;