Merge branch 'pci/dpc' into next

* pci/dpc:
  PCI/DPC: Fix control register setting
  PCI/DPC: Skip DPC event if device is not present

drivers/pci/pcie/pcie-dpc.c

@@ -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",
@@ -144,7 +144,7 @@ static int dpc_probe(struct pcie_device *dev)
 
 	dpc->rp = (cap & PCI_EXP_DPC_CAP_RP_EXT);
 
-	ctl |= PCI_EXP_DPC_CTL_EN_NONFATAL | PCI_EXP_DPC_CTL_INT_EN;
+	ctl = (ctl & 0xfff4) | PCI_EXP_DPC_CTL_EN_NONFATAL | PCI_EXP_DPC_CTL_INT_EN;
 	pci_write_config_word(pdev, dpc->cap_pos + PCI_EXP_DPC_CTL, ctl);
 
 	dev_info(&dev->device, "DPC error containment capabilities: Int Msg #%d, RPExt%c PoisonedTLP%c SwTrigger%c RP PIO Log %d, DL_ActiveErr%c\n",