[Xen-devel] [PATCH 9/9] In pci_frontend_disable_msi do not alter the dev->irq.

[Konrad Rzeszutek Wilk <konrad.wilk@xxxxxxxxxx>]

The MSI subsystem keeps track of the IRQ number before enabling
MSI and it will write the old IRQ once it has completed disabling
MSI functionality of the device.

Signed-off-by: Konrad Rzeszutek Wilk <konrad.wilk@xxxxxxxxxx>
---
 drivers/pci/xen-pcifront.c |    4 +---
 1 files changed, 1 insertions(+), 3 deletions(-)

diff --git a/drivers/pci/xen-pcifront.c b/drivers/pci/xen-pcifront.c
index ca95b23..cc3b51b 100644
--- a/drivers/pci/xen-pcifront.c
+++ b/drivers/pci/xen-pcifront.c
@@ -368,9 +368,7 @@ void pci_frontend_disable_msi(struct pci_dev *dev)
                printk(KERN_DEBUG "get no response from backend for disable 
MSI\n");
                return;
        }
-       if (likely(!err))
-               dev->irq = op.value;
-       else
+       if (err)
                /* how can pciback notify us fail? */
                printk(KERN_DEBUG "get fake response frombackend \n");
 }
-- 
1.6.2.5


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