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alistair23-linux
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Merge branch 'pci/dpc' 

- clear interrupt status in top half to avoid interrupt storm (Oza
    Pawandeep)

* pci/dpc:
  PCI/DPC: Clear interrupt status in interrupt handler top half
hifive-unleashed-5.1
Bjorn Helgaas 2018-06-06 16:10:06 -05:00
parent 08b5b2f783 56abbf8ad7
commit 8e069da28d
1 changed files with 4 additions and 1 deletions
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5
drivers/pci/pcie/dpc.c
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@ -104,7 +104,7 @@ static pci_ers_result_t dpc_reset_link(struct pci_dev *pdev)
}
pci_write_config_word(pdev, cap + PCI_EXP_DPC_STATUS,
PCI_EXP_DPC_STATUS_TRIGGER | PCI_EXP_DPC_STATUS_INTERRUPT);
PCI_EXP_DPC_STATUS_TRIGGER);
pci_read_config_word(pdev, cap + PCI_EXP_DPC_CTL, &ctl);
pci_write_config_word(pdev, cap + PCI_EXP_DPC_CTL,
@ -225,6 +225,9 @@ static irqreturn_t dpc_irq(int irq, void *context)
if (dpc->rp_extensions && reason == 3 && ext_reason == 0)
dpc_process_rp_pio_error(dpc);
pci_write_config_word(pdev, cap + PCI_EXP_DPC_STATUS,
PCI_EXP_DPC_STATUS_INTERRUPT);
schedule_work(&dpc->work);
return IRQ_HANDLED;