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PCI/DPC: Use threaded IRQ for bottom half handling
Remove the work struct that was being used to handle a DPC event and use a threaded IRQ instead. Signed-off-by: Keith Busch <keith.busch@intel.com> Signed-off-by: Bjorn Helgaas <bhelgaas@google.com> Reviewed-by: Sinan Kaya <okaya@kernel.org> Reviewed-by: Oza Pawandeep <poza@codeaurora.org>
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@ -17,7 +17,6 @@
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struct dpc_dev {
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struct pcie_device *dev;
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struct work_struct work;
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u16 cap_pos;
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bool rp_extensions;
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u8 rp_log_size;
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@ -160,10 +159,10 @@ static void dpc_process_rp_pio_error(struct dpc_dev *dpc)
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pci_write_config_dword(pdev, cap + PCI_EXP_DPC_RP_PIO_STATUS, status);
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}
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static void dpc_work(struct work_struct *work)
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static irqreturn_t dpc_handler(int irq, void *context)
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{
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struct aer_err_info info;
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struct dpc_dev *dpc = container_of(work, struct dpc_dev, work);
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struct dpc_dev *dpc = context;
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struct pci_dev *pdev = dpc->dev->port;
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struct device *dev = &dpc->dev->device;
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u16 cap = dpc->cap_pos, status, source, reason, ext_reason;
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@ -194,6 +193,8 @@ static void dpc_work(struct work_struct *work)
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/* We configure DPC so it only triggers on ERR_FATAL */
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pcie_do_fatal_recovery(pdev, PCIE_PORT_SERVICE_DPC);
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return IRQ_HANDLED;
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}
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static irqreturn_t dpc_irq(int irq, void *context)
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@ -210,7 +211,7 @@ static irqreturn_t dpc_irq(int irq, void *context)
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pci_write_config_word(pdev, cap + PCI_EXP_DPC_STATUS,
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PCI_EXP_DPC_STATUS_INTERRUPT);
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if (status & PCI_EXP_DPC_STATUS_TRIGGER)
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schedule_work(&dpc->work);
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return IRQ_WAKE_THREAD;
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return IRQ_HANDLED;
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}
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@ -232,11 +233,11 @@ static int dpc_probe(struct pcie_device *dev)
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dpc->cap_pos = pci_find_ext_capability(pdev, PCI_EXT_CAP_ID_DPC);
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dpc->dev = dev;
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INIT_WORK(&dpc->work, dpc_work);
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set_service_data(dev, dpc);
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status = devm_request_irq(device, dev->irq, dpc_irq, IRQF_SHARED,
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"pcie-dpc", dpc);
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status = devm_request_threaded_irq(device, dev->irq, dpc_irq,
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dpc_handler, IRQF_SHARED,
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"pcie-dpc", dpc);
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if (status) {
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dev_warn(device, "request IRQ%d failed: %d\n", dev->irq,
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status);
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