[PATCH v7 1/5] PCI/DPC: Clarify naming for error port in DPC Handling

[Shuai Xue <xueshuai@linux.alibaba.com>]

dpc_handler() is registered for error port which recevie DPC interrupt
and acpi_dpc_port_get() locate the port that experienced the containment
event.

Rename edev and pdev to err_port for clear so that later patch will
avoid misused err_port in pcie_do_recovery().

No functional changes intended.

Reviewed-by: Kuppuswamy Sathyanarayanan <sathyanarayanan.kuppuswamy@linux.intel.com>
Signed-off-by: Shuai Xue <xueshuai@linux.alibaba.com>
---
 drivers/pci/pcie/dpc.c | 10 +++++-----
 drivers/pci/pcie/edr.c | 34 +++++++++++++++++-----------------
 2 files changed, 22 insertions(+), 22 deletions(-)

diff --git a/drivers/pci/pcie/dpc.c b/drivers/pci/pcie/dpc.c
index fc18349614d7..bff29726c6a5 100644
--- a/drivers/pci/pcie/dpc.c
+++ b/drivers/pci/pcie/dpc.c
@@ -361,21 +361,21 @@ static bool dpc_is_surprise_removal(struct pci_dev *pdev)
 
 static irqreturn_t dpc_handler(int irq, void *context)
 {
-	struct pci_dev *pdev = context;
+	struct pci_dev *err_port = context;
 
 	/*
 	 * According to PCIe r6.0 sec 6.7.6, errors are an expected side effect
 	 * of async removal and should be ignored by software.
 	 */
-	if (dpc_is_surprise_removal(pdev)) {
-		dpc_handle_surprise_removal(pdev);
+	if (dpc_is_surprise_removal(err_port)) {
+		dpc_handle_surprise_removal(err_port);
 		return IRQ_HANDLED;
 	}
 
-	dpc_process_error(pdev);
+	dpc_process_error(err_port);
 
 	/* We configure DPC so it only triggers on ERR_FATAL */
-	pcie_do_recovery(pdev, pci_channel_io_frozen, dpc_reset_link);
+	pcie_do_recovery(err_port, pci_channel_io_frozen, dpc_reset_link);
 
 	return IRQ_HANDLED;
 }
diff --git a/drivers/pci/pcie/edr.c b/drivers/pci/pcie/edr.c
index e86298dbbcff..521fca2f40cb 100644
--- a/drivers/pci/pcie/edr.c
+++ b/drivers/pci/pcie/edr.c
@@ -150,7 +150,7 @@ static int acpi_send_edr_status(struct pci_dev *pdev, struct pci_dev *edev,
 
 static void edr_handle_event(acpi_handle handle, u32 event, void *data)
 {
-	struct pci_dev *pdev = data, *edev;
+	struct pci_dev *pdev = data, *err_port;
 	pci_ers_result_t estate = PCI_ERS_RESULT_DISCONNECT;
 	u16 status;
 
@@ -169,36 +169,36 @@ static void edr_handle_event(acpi_handle handle, u32 event, void *data)
 	 * may be that port or a parent of it (PCI Firmware r3.3, sec
 	 * 4.6.13).
 	 */
-	edev = acpi_dpc_port_get(pdev);
-	if (!edev) {
+	err_port = acpi_dpc_port_get(pdev);
+	if (!err_port) {
 		pci_err(pdev, "Firmware failed to locate DPC port\n");
 		return;
 	}
 
-	pci_dbg(pdev, "Reported EDR dev: %s\n", pci_name(edev));
+	pci_dbg(pdev, "Reported EDR dev: %s\n", pci_name(err_port));
 
 	/* If port does not support DPC, just send the OST */
-	if (!edev->dpc_cap) {
-		pci_err(edev, FW_BUG "This device doesn't support DPC\n");
+	if (!err_port->dpc_cap) {
+		pci_err(err_port, FW_BUG "This device doesn't support DPC\n");
 		goto send_ost;
 	}
 
 	/* Check if there is a valid DPC trigger */
-	pci_read_config_word(edev, edev->dpc_cap + PCI_EXP_DPC_STATUS, &status);
+	pci_read_config_word(err_port, err_port->dpc_cap + PCI_EXP_DPC_STATUS, &status);
 	if (!(status & PCI_EXP_DPC_STATUS_TRIGGER)) {
-		pci_err(edev, "Invalid DPC trigger %#010x\n", status);
+		pci_err(err_port, "Invalid DPC trigger %#010x\n", status);
 		goto send_ost;
 	}
 
-	dpc_process_error(edev);
-	pci_aer_raw_clear_status(edev);
+	dpc_process_error(err_port);
+	pci_aer_raw_clear_status(err_port);
 
 	/*
 	 * Irrespective of whether the DPC event is triggered by ERR_FATAL
 	 * or ERR_NONFATAL, since the link is already down, use the FATAL
 	 * error recovery path for both cases.
 	 */
-	estate = pcie_do_recovery(edev, pci_channel_io_frozen, dpc_reset_link);
+	estate = pcie_do_recovery(err_port, pci_channel_io_frozen, dpc_reset_link);
 
 send_ost:
 
@@ -207,15 +207,15 @@ static void edr_handle_event(acpi_handle handle, u32 event, void *data)
 	 * to firmware. If not successful, send _OST(0xF, BDF << 16 | 0x81).
 	 */
 	if (estate == PCI_ERS_RESULT_RECOVERED) {
-		pci_dbg(edev, "DPC port successfully recovered\n");
-		pcie_clear_device_status(edev);
-		acpi_send_edr_status(pdev, edev, EDR_OST_SUCCESS);
+		pci_dbg(err_port, "DPC port successfully recovered\n");
+		pcie_clear_device_status(err_port);
+		acpi_send_edr_status(pdev, err_port, EDR_OST_SUCCESS);
 	} else {
-		pci_dbg(edev, "DPC port recovery failed\n");
-		acpi_send_edr_status(pdev, edev, EDR_OST_FAILED);
+		pci_dbg(err_port, "DPC port recovery failed\n");
+		acpi_send_edr_status(pdev, err_port, EDR_OST_FAILED);
 	}
 
-	pci_dev_put(edev);
+	pci_dev_put(err_port);
 }
 
 void pci_acpi_add_edr_notifier(struct pci_dev *pdev)
-- 
2.39.3