linux-kernel - [PATCH v8 03/20] PCI/AER: Factor COR/UNCOR error handling out from aer_isr_one

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Message-ID: <20250522232339.1525671-4-helgaas@kernel.org>
Date: Thu, 22 May 2025 18:21:09 -0500
From: Bjorn Helgaas <helgaas@...nel.org>
To: linux-pci@...r.kernel.org
Cc: Jon Pan-Doh <pandoh@...gle.com>,
	Karolina Stolarek <karolina.stolarek@...cle.com>,
	Weinan Liu <wnliu@...gle.com>,
	Martin Petersen <martin.petersen@...cle.com>,
	Ben Fuller <ben.fuller@...cle.com>,
	Drew Walton <drewwalton@...rosoft.com>,
	Anil Agrawal <anilagrawal@...a.com>,
	Tony Luck <tony.luck@...el.com>,
	Ilpo Järvinen <ilpo.jarvinen@...ux.intel.com>,
	Sathyanarayanan Kuppuswamy <sathyanarayanan.kuppuswamy@...ux.intel.com>,
	Lukas Wunner <lukas@...ner.de>,
	Jonathan Cameron <Jonathan.Cameron@...wei.com>,
	Sargun Dhillon <sargun@...a.com>,
	"Paul E . McKenney" <paulmck@...nel.org>,
	Mahesh J Salgaonkar <mahesh@...ux.ibm.com>,
	Oliver O'Halloran <oohall@...il.com>,
	Kai-Heng Feng <kaihengf@...dia.com>,
	Keith Busch <kbusch@...nel.org>,
	Robert Richter <rrichter@....com>,
	Terry Bowman <terry.bowman@....com>,
	Shiju Jose <shiju.jose@...wei.com>,
	Dave Jiang <dave.jiang@...el.com>,
	linux-kernel@...r.kernel.org,
	linuxppc-dev@...ts.ozlabs.org,
	Bjorn Helgaas <bhelgaas@...gle.com>
Subject: [PATCH v8 03/20] PCI/AER: Factor COR/UNCOR error handling out from aer_isr_one_error()

From: Bjorn Helgaas <bhelgaas@...gle.com>

aer_isr_one_error() duplicates the Error Source ID logging and AER error
processing for Correctable Errors and Uncorrectable Errors.  Factor out the
duplicated code to aer_isr_one_error_type().

aer_isr_one_error() doesn't need the struct aer_rpc pointer, so pass it the
Root Port or RCEC pci_dev pointer instead.

Signed-off-by: Bjorn Helgaas <bhelgaas@...gle.com>
Reviewed-by: Ilpo Järvinen <ilpo.jarvinen@...ux.intel.com>
Reviewed-by: Jonathan Cameron <Jonathan.Cameron@...wei.com>
Reviewed-by: Kuppuswamy Sathyanarayanan <sathyanarayanan.kuppuswamy@...ux.intel.com>
Link: https://patch.msgid.link/20250520215047.1350603-4-helgaas@kernel.org
---
 drivers/pci/pcie/aer.c | 36 +++++++++++++++++++++++-------------
 1 file changed, 23 insertions(+), 13 deletions(-)

diff --git a/drivers/pci/pcie/aer.c b/drivers/pci/pcie/aer.c
index a1cf8c7ef628..568229288ca3 100644
--- a/drivers/pci/pcie/aer.c
+++ b/drivers/pci/pcie/aer.c
@@ -1273,17 +1273,32 @@ static inline void aer_process_err_devices(struct aer_err_info *e_info)
 }
 
 /**
- * aer_isr_one_error - consume an error detected by Root Port
- * @rpc: pointer to the Root Port which holds an error
+ * aer_isr_one_error_type - consume a Correctable or Uncorrectable Error
+ *			    detected by Root Port or RCEC
+ * @root: pointer to Root Port or RCEC that signaled AER interrupt
+ * @info: pointer to AER error info
+ */
+static void aer_isr_one_error_type(struct pci_dev *root,
+				   struct aer_err_info *info)
+{
+	aer_print_port_info(root, info);
+
+	if (find_source_device(root, info))
+		aer_process_err_devices(info);
+}
+
+/**
+ * aer_isr_one_error - consume error(s) signaled by an AER interrupt from
+ *		       Root Port or RCEC
+ * @root: pointer to Root Port or RCEC that signaled AER interrupt
  * @e_src: pointer to an error source
  */
-static void aer_isr_one_error(struct aer_rpc *rpc,
+static void aer_isr_one_error(struct pci_dev *root,
 		struct aer_err_source *e_src)
 {
-	struct pci_dev *pdev = rpc->rpd;
 	struct aer_err_info e_info;
 
-	pci_rootport_aer_stats_incr(pdev, e_src);
+	pci_rootport_aer_stats_incr(root, e_src);
 
 	/*
 	 * There is a possibility that both correctable error and
@@ -1297,10 +1312,8 @@ static void aer_isr_one_error(struct aer_rpc *rpc,
 			e_info.multi_error_valid = 1;
 		else
 			e_info.multi_error_valid = 0;
-		aer_print_port_info(pdev, &e_info);
 
-		if (find_source_device(pdev, &e_info))
-			aer_process_err_devices(&e_info);
+		aer_isr_one_error_type(root, &e_info);
 	}
 
 	if (e_src->status & PCI_ERR_ROOT_UNCOR_RCV) {
@@ -1316,10 +1329,7 @@ static void aer_isr_one_error(struct aer_rpc *rpc,
 		else
 			e_info.multi_error_valid = 0;
 
-		aer_print_port_info(pdev, &e_info);
-
-		if (find_source_device(pdev, &e_info))
-			aer_process_err_devices(&e_info);
+		aer_isr_one_error_type(root, &e_info);
 	}
 }
 
@@ -1340,7 +1350,7 @@ static irqreturn_t aer_isr(int irq, void *context)
 		return IRQ_NONE;
 
 	while (kfifo_get(&rpc->aer_fifo, &e_src))
-		aer_isr_one_error(rpc, &e_src);
+		aer_isr_one_error(rpc->rpd, &e_src);
 	return IRQ_HANDLED;
 }
 
-- 
2.43.0