linux-kernel - [PATCH] PCI: Disable AER with pci=nomsi

lists.openwall.net		lists / announce owl-users owl-dev john-users john-dev passwdqc-users yescrypt popa3d-users / oss-security kernel-hardening musl sabotage tlsify passwords / crypt-dev xvendor / Bugtraq Full-Disclosure linux-kernel linux-netdev linux-ext4 linux-hardening linux-cve-announce PHC
Open Source and information security mailing list archives

Hash Suite: Windows password security audit tool. GUI, reports in PDF.

[<prev] [next>] [thread-next>] [day] [month] [year] [list]

Date:	Wed, 16 Sep 2009 22:40:22 +0200
From:	Andi Kleen <andi@...stfloor.org>
To:	jbarnes@...tuousgeek.org, linux-kernel@...r.kernel.org
Subject: [PATCH] PCI: Disable AER with pci=nomsi

PCI: Disable AER with pci=nomsi

When booting with pci=nomsi aer causes lost interrupts and
lockdep inversions.

So check if MSIs are not disabled before initializing the aer
driver.

Signed-off-by: Andi Kleen <ak@...ux.intel.com>

---
 drivers/pci/pcie/aer/aerdrv.c |    2 ++
 1 file changed, 2 insertions(+)

Index: linux/drivers/pci/pcie/aer/aerdrv.c
===================================================================
--- linux.orig/drivers/pci/pcie/aer/aerdrv.c
+++ linux/drivers/pci/pcie/aer/aerdrv.c
@@ -316,6 +316,8 @@ static int __init aer_service_init(void)
 {
 	if (pcie_aer_disable)
 		return -ENXIO;
+	if (!pci_msi_enabled())
+		return -ENXIO;
 	return pcie_port_service_register(&aerdriver);
 }
 
--
To unsubscribe from this list: send the line "unsubscribe linux-kernel" in
the body of a message to majordomo@...r.kernel.org
More majordomo info at  http://vger.kernel.org/majordomo-info.html
Please read the FAQ at  http://www.tux.org/lkml/