[PATCH v2 2/8] PCI: pciehp: Return IRQ_NONE when we can't read interrupt status

[Bjorn Helgaas]

After 1469d17dd341 ("PCI: pciehp: Handle invalid data when reading from
non-existent devices"), we returned IRQ_HANDLED when we failed to read
interrupt status from the bridge.  I think it's better to return IRQ_NONE,
as we do in other cases where there's no interrupt pending.  This will
facilitate refactoring the loop in pcie_isr(): we'll be able to call the
ISR in a loop as long as it returns IRQ_HANDLED.

Return IRQ_NONE if we couldn't read interrupt status.

Signed-off-by: Bjorn Helgaas <bhelg...@google.com>
---
 drivers/pci/hotplug/pciehp_hpc.c |    2 +-
 1 file changed, 1 insertion(+), 1 deletion(-)

diff --git a/drivers/pci/hotplug/pciehp_hpc.c b/drivers/pci/hotplug/pciehp_hpc.c
index 264df36..b8efe1b 100644
--- a/drivers/pci/hotplug/pciehp_hpc.c
+++ b/drivers/pci/hotplug/pciehp_hpc.c
@@ -561,7 +561,7 @@ static irqreturn_t pcie_isr(int irq, void *dev_id)
                if (status == (u16) ~0) {
                        ctrl_info(ctrl, "%s: no response from device\n",
                                  __func__);
-                       return IRQ_HANDLED;
+                       return IRQ_NONE;
                }
 
                /*