From 4d2b2956ef1113f1cc43e98e947c20d9c7d2712c Mon Sep 17 00:00:00 2001 From: Huang Ying Date: Wed, 13 Jul 2011 13:14:12 +0800 Subject: [PATCH] ACPI, APEI, HEST, Detect duplicated hardware error source ID 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 Tested-by: Mathias Signed-off-by: Len Brown --- drivers/acpi/apei/hest.c | 12 +++++++++++- 1 file changed, 11 insertions(+), 1 deletion(-) diff --git a/drivers/acpi/apei/hest.c b/drivers/acpi/apei/hest.c index abda3786a5d7..181bc2f7bb74 100644 --- a/drivers/acpi/apei/hest.c +++ b/drivers/acpi/apei/hest.c @@ -139,13 +139,23 @@ static int __init hest_parse_ghes(struct acpi_hest_header *hest_hdr, void *data) { 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; -- 2.39.5