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PCI/DPC: Skip DPC event if device is not present 

The DPC interupt may be executed on a device that is being removed.  Skip
queuing event handling if the status is all 1's, which should be seen only
if the device is not present.

Signed-off-by: Keith Busch <keith.busch@intel.com>
Signed-off-by: Bjorn Helgaas <bhelgaas@google.com>
This commit is contained in:
Keith Busch 2017-04-28 12:02:48 -04:00 committed by Bjorn Helgaas
parent 2ea659a9ef
commit 993d668183
1 changed files with 1 additions and 1 deletions
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2
drivers/pci/pcie/pcie-dpc.c
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@ -92,7 +92,7 @@ static irqreturn_t dpc_irq(int irq, void *context)
pci_read_config_word(pdev, dpc->cap_pos + PCI_EXP_DPC_STATUS, &status);
pci_read_config_word(pdev, dpc->cap_pos + PCI_EXP_DPC_SOURCE_ID,
&source);
if (!status)
if (!status || status == (u16)(~0))
return IRQ_NONE;
dev_info(&dpc->dev->device, "DPC containment event, status:%#06x source:%#06x\n",