[PATCH v8 12/20] PCI/AER: Check log level once and remember it

[Bjorn Helgaas <helgaas@kernel.org>]

From: Karolina Stolarek <karolina.stolarek@oracle.com>

When reporting an AER error, we check its type multiple times to determine
the log level for each message. Do this check only in the top-level
functions (aer_isr_one_error(), pci_print_aer()) and save the level in
struct aer_err_info.

[bhelgaas: save log level in struct aer_err_info instead of passing it
as a parameter]

Signed-off-by: Karolina Stolarek <karolina.stolarek@oracle.com>
Tested-by: Krzysztof Wilczyński <kwilczynski@kernel.org>
Reviewed-by: Ilpo Järvinen <ilpo.jarvinen@linux.intel.com>
Reviewed-by: Kuppuswamy Sathyanarayanan <sathyanarayanan.kuppuswamy@linux.intel.com>
Reviewed-by: Jonathan Cameron <Jonathan.Cameron@huawei.com>
Signed-off-by: Bjorn Helgaas <bhelgaas@google.com>
Link: https://patch.msgid.link/20250520215047.1350603-13-helgaas@kernel.org
---
 drivers/pci/pci.h      |  1 +
 drivers/pci/pcie/aer.c | 21 ++++++++++-----------
 drivers/pci/pcie/dpc.c |  1 +
 3 files changed, 12 insertions(+), 11 deletions(-)

diff --git a/drivers/pci/pci.h b/drivers/pci/pci.h
index b81e99cd4b62..705f9ef58acc 100644
--- a/drivers/pci/pci.h
+++ b/drivers/pci/pci.h
@@ -588,6 +588,7 @@ static inline bool pci_dev_test_and_set_removed(struct pci_dev *dev)
 struct aer_err_info {
 	struct pci_dev *dev[AER_MAX_MULTI_ERR_DEVICES];
 	int error_dev_num;
+	const char *level;		/* printk level */
 
 	unsigned int id:16;
 
diff --git a/drivers/pci/pcie/aer.c b/drivers/pci/pcie/aer.c
index 636bcd92afa1..f80c78846a14 100644
--- a/drivers/pci/pcie/aer.c
+++ b/drivers/pci/pcie/aer.c
@@ -669,21 +669,18 @@ static void pci_rootport_aer_stats_incr(struct pci_dev *pdev,
 	}
 }
 
-static void __aer_print_error(struct pci_dev *dev,
-			      struct aer_err_info *info)
+static void __aer_print_error(struct pci_dev *dev, struct aer_err_info *info)
 {
 	const char **strings;
 	unsigned long status = info->status & ~info->mask;
-	const char *level, *errmsg;
+	const char *level = info->level;
+	const char *errmsg;
 	int i;
 
-	if (info->severity == AER_CORRECTABLE) {
+	if (info->severity == AER_CORRECTABLE)
 		strings = aer_correctable_error_string;
-		level = KERN_WARNING;
-	} else {
+	else
 		strings = aer_uncorrectable_error_string;
-		level = KERN_ERR;
-	}
 
 	for_each_set_bit(i, &status, 32) {
 		errmsg = strings[i];
@@ -712,7 +709,7 @@ void aer_print_error(struct pci_dev *dev, struct aer_err_info *info)
 {
 	int layer, agent;
 	int id = pci_dev_id(dev);
-	const char *level;
+	const char *level = info->level;
 
 	pci_dev_aer_stats_incr(dev, info);
 	trace_aer_event(pci_name(dev), (info->status & ~info->mask),
@@ -727,8 +724,6 @@ void aer_print_error(struct pci_dev *dev, struct aer_err_info *info)
 	layer = AER_GET_LAYER_ERROR(info->severity, info->status);
 	agent = AER_GET_AGENT(info->severity, info->status);
 
-	level = (info->severity == AER_CORRECTABLE) ? KERN_WARNING : KERN_ERR;
-
 	aer_printk(level, dev, "PCIe Bus Error: severity=%s, type=%s, (%s)\n",
 		   aer_error_severity_string[info->severity],
 		   aer_error_layer[layer], aer_agent_string[agent]);
@@ -774,9 +769,11 @@ void pci_print_aer(struct pci_dev *dev, int aer_severity,
 	if (aer_severity == AER_CORRECTABLE) {
 		status = aer->cor_status;
 		mask = aer->cor_mask;
+		info.level = KERN_WARNING;
 	} else {
 		status = aer->uncor_status;
 		mask = aer->uncor_mask;
+		info.level = KERN_ERR;
 		tlp_header_valid = status & AER_LOG_TLP_MASKS;
 	}
 
@@ -1306,6 +1303,7 @@ static void aer_isr_one_error(struct pci_dev *root,
 		struct aer_err_info e_info = {
 			.id = ERR_COR_ID(e_src->id),
 			.severity = AER_CORRECTABLE,
+			.level = KERN_WARNING,
 			.multi_error_valid = multi ? 1 : 0,
 		};
 
@@ -1318,6 +1316,7 @@ static void aer_isr_one_error(struct pci_dev *root,
 		struct aer_err_info e_info = {
 			.id = ERR_UNCOR_ID(e_src->id),
 			.severity = fatal ? AER_FATAL : AER_NONFATAL,
+			.level = KERN_ERR,
 			.multi_error_valid = multi ? 1 : 0,
 		};
 
diff --git a/drivers/pci/pcie/dpc.c b/drivers/pci/pcie/dpc.c
index 9d85f1b3b761..6c98fabdba57 100644
--- a/drivers/pci/pcie/dpc.c
+++ b/drivers/pci/pcie/dpc.c
@@ -252,6 +252,7 @@ static int dpc_get_aer_uncorrect_severity(struct pci_dev *dev,
 	else
 		info->severity = AER_NONFATAL;
 
+	info->level = KERN_ERR;
 	return 1;
 }
 
-- 
2.43.0