linux-kernel - [PATCH 2/3] ACPI/APEI: Force fatal AER severity when bus has been reset

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Date:	Tue, 28 May 2013 12:48:48 -0600
From:	Betty Dall <betty.dall@...com>
To:	rjw@...k.pl, bhelgaas@...gle.com
Cc:	ying.huang@...el.com, linux-acpi@...r.kernel.org,
	linux-kernel@...r.kernel.org, linux-pci@...r.kernel.org,
	Betty Dall <betty.dall@...com>
Subject: [PATCH 2/3] ACPI/APEI: Force fatal AER severity when bus has been reset

The CPER error record has a reset bit that indicates that the platform
has reset the bus. The reset bit can be set for any severity error
including recoverable.  From the AER code path's perspective,
any error is fatal if the bus has been reset. This patch upgrades the
severity of the AER recovery to AER_FATAL whenever the CPER error record
indicates that the bus has been reset.

Signed-off-by: Betty Dall <betty.dall@...com>
---

 drivers/acpi/apei/ghes.c |   21 ++++++++++++++++++++-
 1 files changed, 20 insertions(+), 1 deletions(-)


diff --git a/drivers/acpi/apei/ghes.c b/drivers/acpi/apei/ghes.c
index d668a8a..4a42afc 100644
--- a/drivers/acpi/apei/ghes.c
+++ b/drivers/acpi/apei/ghes.c
@@ -451,7 +451,26 @@ static void ghes_do_proc(struct ghes *ghes,
 				int aer_severity;
 				devfn = PCI_DEVFN(pcie_err->device_id.device,
 						  pcie_err->device_id.function);
-				aer_severity = cper_severity_to_aer(sev);
+				/*
+				 * Some Firmware First implementations
+				 * put the device in SBR to contain
+				 * the error. This is indicated by the
+				 * CPER Section Decriptor Flags reset
+				 * bit which means the component must
+				 * be re-initialized or re-enabled
+				 * prior to use. Promoting the AER
+				 * serverity to FATAL will cause the
+				 * AER code to link_reset and allow
+				 * drivers to reprogram their cards.
+				 */
+				if (gdata->flags & CPER_SEC_RESET)
+					aer_severity = cper_severity_to_aer(
+							CPER_SEV_FATAL);
+				else
+					aer_severity =
+						cper_severity_to_aer(sev);
+
+
 				aer_recover_queue(pcie_err->device_id.segment,
 						  pcie_err->device_id.bus,
 						  devfn, aer_severity);
--
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