linux-kernel - [PATCH v12 3/8] PCI/DPC: Add dpc_process

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Message-Id: <96406f10b6211b208f52bd664760e3c30e6b8611.1578682741.git.sathyanarayanan.kuppuswamy@linux.intel.com>
Date:   Sun, 12 Jan 2020 14:43:57 -0800
From:   sathyanarayanan.kuppuswamy@...ux.intel.com
To:     bhelgaas@...gle.com
Cc:     linux-pci@...r.kernel.org, linux-kernel@...r.kernel.org,
        ashok.raj@...el.com, sathyanarayanan.kuppuswamy@...ux.intel.com,
        Keith Busch <keith.busch@...el.com>
Subject: [PATCH v12 3/8] PCI/DPC: Add dpc_process_error() wrapper function

From: Kuppuswamy Sathyanarayanan <sathyanarayanan.kuppuswamy@...ux.intel.com>

With Error Disconnect Recover (EDR) support, we need to support
processing DPC event either from DPC IRQ or ACPI EDR event. So create
a wrapper function dpc_process_error() and move common error handling
code in to it. It will be used to process the DPC event in both DPC IRQ
and EDR ACPI event contexts.

Signed-off-by: Kuppuswamy Sathyanarayanan <sathyanarayanan.kuppuswamy@...ux.intel.com>
Acked-by: Keith Busch <keith.busch@...el.com>
---
 drivers/pci/pcie/dpc.c | 10 ++++++++--
 1 file changed, 8 insertions(+), 2 deletions(-)

diff --git a/drivers/pci/pcie/dpc.c b/drivers/pci/pcie/dpc.c
index 2c1251afb6a2..d29f5d25f3f9 100644
--- a/drivers/pci/pcie/dpc.c
+++ b/drivers/pci/pcie/dpc.c
@@ -241,10 +241,9 @@ static int dpc_get_aer_uncorrect_severity(struct pci_dev *dev,
 	return 1;
 }
 
-static irqreturn_t dpc_handler(int irq, void *context)
+static void dpc_process_error(struct dpc_dev *dpc)
 {
 	struct aer_err_info info;
-	struct dpc_dev *dpc = context;
 	struct pci_dev *pdev = dpc->dev->port;
 	u16 cap = dpc->cap_pos, status, source, reason, ext_reason;
 
@@ -277,6 +276,13 @@ static irqreturn_t dpc_handler(int irq, void *context)
 
 	/* We configure DPC so it only triggers on ERR_FATAL */
 	pcie_do_recovery(pdev, pci_channel_io_frozen, PCIE_PORT_SERVICE_DPC);
+}
+
+static irqreturn_t dpc_handler(int irq, void *context)
+{
+	struct dpc_dev *dpc = context;
+
+	dpc_process_error(dpc);
 
 	return IRQ_HANDLED;
 }
-- 
2.21.0