linux-kernel - [PATCH] PCI/AER: update AER status string print to match other AER logs

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Date:   Tue, 17 Oct 2017 09:42:02 -0600
From:   Tyler Baicar <tbaicar@...eaurora.org>
To:     bhelgaas@...gle.com, helgaas@...nel.org, linux-pci@...r.kernel.org,
        linux-kernel@...r.kernel.org
Cc:     Tyler Baicar <tbaicar@...eaurora.org>
Subject: [PATCH] PCI/AER: update AER status string print to match other AER logs

Currently the AER driver uses cper_print_bits() to print the AER status
string. This causes the status string to not include the proper PCI device
name prefix that the other AER prints include. Also, it has a different
print level than all the other AER prints.

Update the AER driver to print the AER status string with the proper string
prefix and proper print level.

Previous log example:

e1000e 0003:01:00.1: aer_status: 0x00000041, aer_mask: 0x00000000
Receiver Error, Bad TLP
e1000e 0003:01:00.1: aer_layer=Physical Layer, aer_agent=Receiver ID
pcieport 0003:00:00.0: aer_status: 0x00001000, aer_mask: 0x0000e000
Replay Timer Timeout
pcieport 0003:00:00.0: aer_layer=Data Link Layer, aer_agent=Transmitter ID

New log:

e1000e 0003:01:00.1: aer_status: 0x00000041, aer_mask: 0x00000000
e1000e 0003:01:00.1: Receiver Error
e1000e 0003:01:00.1: Bad TLP
e1000e 0003:01:00.1: aer_layer=Physical Layer, aer_agent=Receiver ID
pcieport 0003:00:00.0: aer_status: 0x00001000, aer_mask: 0x0000e000
pcieport 0003:00:00.0: Replay Timer Timeout
pcieport 0003:00:00.0: aer_layer=Data Link Layer, aer_agent=Transmitter ID

Signed-off-by: Tyler Baicar <tbaicar@...eaurora.org>
---
 drivers/pci/pcie/aer/aerdrv_errprint.c | 15 ++++++++++++++-
 1 file changed, 14 insertions(+), 1 deletion(-)

diff --git a/drivers/pci/pcie/aer/aerdrv_errprint.c b/drivers/pci/pcie/aer/aerdrv_errprint.c
index 54c4b69..b718daa 100644
--- a/drivers/pci/pcie/aer/aerdrv_errprint.c
+++ b/drivers/pci/pcie/aer/aerdrv_errprint.c
@@ -206,6 +206,19 @@ void aer_print_port_info(struct pci_dev *dev, struct aer_err_info *info)
 }
 
 #ifdef CONFIG_ACPI_APEI_PCIEAER
+void dev_print_bits(struct pci_dev *dev, unsigned int bits,
+		    const char * const strs[], unsigned int strs_size)
+{
+	unsigned int i;
+
+	for (i = 0; i < strs_size; i++) {
+		if (!(bits & (1U << i)))
+			continue;
+		if (strs[i])
+			dev_err(&dev->dev, "%s\n", strs[i]);
+	}
+}
+
 int cper_severity_to_aer(int cper_severity)
 {
 	switch (cper_severity) {
@@ -243,7 +256,7 @@ void cper_print_aer(struct pci_dev *dev, int aer_severity,
 	agent = AER_GET_AGENT(aer_severity, status);
 
 	dev_err(&dev->dev, "aer_status: 0x%08x, aer_mask: 0x%08x\n", status, mask);
-	cper_print_bits("", status, status_strs, status_strs_size);
+	dev_print_bits(dev, status, status_strs, status_strs_size);
 	dev_err(&dev->dev, "aer_layer=%s, aer_agent=%s\n",
 		aer_error_layer[layer], aer_agent_string[agent]);
 
-- 
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Qualcomm Technologies, Inc. is a member of the Code Aurora Forum,
a Linux Foundation Collaborative Project.