From 70e8b40176c75d3544024e7c934720b11a8a11bf Mon Sep 17 00:00:00 2001
From: Bjorn Helgaas <bhelgaas@google.com>
Date: Thu, 8 Sep 2016 16:43:40 -0500
Subject: [PATCH] PCI: pciehp: Return IRQ_NONE when we can't read interrupt
status
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.
Tested-by: Lukas Wunner <lukas@wunner.de>
Signed-off-by: Bjorn Helgaas <bhelgaas@google.com>
Reviewed-by: Mika Westerberg <mika.westerberg@linux.intel.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 264df360444ca..b8efe1bbc4f41 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;
}
/*
--
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