Commit 993d6681 authored by Keith Busch's avatar Keith Busch Committed by Bjorn Helgaas

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: default avatarKeith Busch <keith.busch@intel.com>
Signed-off-by: default avatarBjorn Helgaas <bhelgaas@google.com>
parent 2ea659a9
...@@ -92,7 +92,7 @@ static irqreturn_t dpc_irq(int irq, void *context) ...@@ -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_STATUS, &status);
pci_read_config_word(pdev, dpc->cap_pos + PCI_EXP_DPC_SOURCE_ID, pci_read_config_word(pdev, dpc->cap_pos + PCI_EXP_DPC_SOURCE_ID,
&source); &source);
if (!status) if (!status || status == (u16)(~0))
return IRQ_NONE; return IRQ_NONE;
dev_info(&dpc->dev->device, "DPC containment event, status:%#06x source:%#06x\n", dev_info(&dpc->dev->device, "DPC containment event, status:%#06x source:%#06x\n",
......
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