Commit 993d6681 authored Apr 28, 2017 by Keith Busch Committed by Bjorn Helgaas May 22, 2017

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>

parent 2ea659a9

drivers/pci/pcie/pcie-dpc.c

+1 −1

Original line number	Diff line number	Diff line
		@@ -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",