linux-kernel - [PATCH 4/4] pci/dmar: Tone down warnings about invalid BIOS DMAR tables

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Date:	Sat, 20 Mar 2010 23:07:26 +0000
From:	Ben Hutchings <ben@...adent.org.uk>
To:	Jesse Barnes <jbarnes@...tuousgeek.org>
Cc:	David Woodhouse <dwmw2@...radead.org>,
	linux-pci <linux-pci@...r.kernel.org>,
	LKML <linux-kernel@...r.kernel.org>
Subject: [PATCH 4/4] pci/dmar: Tone down warnings about invalid BIOS DMAR
 tables

We now know how to deal with these tables so that they are harmless.
Use the TAINT_FIRMWARE_WORKAROUND flag and don't say the BIOS is
'broken' as this makes users think of hardware damage.

Signed-off-by: Ben Hutchings <ben@...adent.org.uk>
---
 drivers/pci/dmar.c |   13 +++++++------
 1 files changed, 7 insertions(+), 6 deletions(-)

diff --git a/drivers/pci/dmar.c b/drivers/pci/dmar.c
index f101057..8aa31c2 100644
--- a/drivers/pci/dmar.c
+++ b/drivers/pci/dmar.c
@@ -615,12 +615,13 @@ int __init dmar_table_init(void)
 
 static void warn_invalid_dmar(u64 addr, const char *message)
 {
-	WARN_ONCE(1, "Your BIOS is broken; DMAR reported at address %llx%s!\n"
-		  "BIOS vendor: %s; Ver: %s; Product Version: %s\n",
-		  addr, message,
-		  dmi_get_system_info(DMI_BIOS_VENDOR),
-		  dmi_get_system_info(DMI_BIOS_VERSION),
-		  dmi_get_system_info(DMI_PRODUCT_VERSION));
+	WARN_TAINT_ONCE(1, TAINT_FIRMWARE_WORKAROUND,
+			"BIOS bug: DMAR reported at address %llx%s!\n"
+			"BIOS vendor: %s; Ver: %s; Product Version: %s\n",
+			addr, message,
+			dmi_get_system_info(DMI_BIOS_VENDOR),
+			dmi_get_system_info(DMI_BIOS_VERSION),
+			dmi_get_system_info(DMI_PRODUCT_VERSION));
 }
 
 int __init check_zero_address(void)
-- 
1.7.0



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