diff mbox

[v3,2/2] x86, pci: Enable PCI INTx when MSI is disabled

Message ID 20121010074612.1084.52398.sendpatchset@indoh (mailing list archive)
State New, archived
Delegated to: Bjorn Helgaas
Headers show

Commit Message

Takao Indoh Oct. 10, 2012, 7:51 a.m. UTC
This patch enables INTx if MSI is disabled in pcibios_enable_device().
In normal case interrupt disable bit in command register is 0b on boot
time, but in case of kdump, this bit may be 1b. It causes problems of
some drivers. At leaset I confirmed mptsas driver does not work in such
a case. This patch fix this problem.

Signed-off-by: Takao Indoh <indou.takao@jp.fujitsu.com>
---
 arch/x86/pci/common.c |    4 +++-
 1 file changed, 3 insertions(+), 1 deletion(-)


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diff mbox

Patch

diff --git a/arch/x86/pci/common.c b/arch/x86/pci/common.c
index 720e973..2bb7ecc 100644
--- a/arch/x86/pci/common.c
+++ b/arch/x86/pci/common.c
@@ -615,8 +615,10 @@  int pcibios_enable_device(struct pci_dev *dev, int mask)
 	if ((err = pci_enable_resources(dev, mask)) < 0)
 		return err;
 
-	if (!pci_dev_msi_enabled(dev))
+	if (!pci_dev_msi_enabled(dev)) {
+		pci_intx(dev, true);
 		return pcibios_enable_irq(dev);
+	}
 	return 0;
 }