linux-kernel - [PATCH 4/7] PCI: xilinx-nwl: Rate-limit misc interrupt messages

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Date: Mon, 22 Apr 2024 15:59:01 -0400
From: Sean Anderson <sean.anderson@...ux.dev>
To: Lorenzo Pieralisi <lpieralisi@...nel.org>,
	Krzysztof Wilczyński <kw@...ux.com>,
	Rob Herring <robh@...nel.org>,
	linux-pci@...r.kernel.org
Cc: linux-arm-kernel@...ts.infradead.org,
	linux-kernel@...r.kernel.org,
	Thippeswamy Havalige <thippeswamy.havalige@....com>,
	Michal Simek <michal.simek@....com>,
	Bjorn Helgaas <bhelgaas@...gle.com>,
	Sean Anderson <sean.anderson@...ux.dev>
Subject: [PATCH 4/7] PCI: xilinx-nwl: Rate-limit misc interrupt messages

The conditions logged by the misc interrupt can occur repeatedly and
continuously. Avoid rendering the console unusable by rate-limiting
these messages.

Signed-off-by: Sean Anderson <sean.anderson@...ux.dev>
---

 drivers/pci/controller/pcie-xilinx-nwl.c | 22 +++++++++++-----------
 1 file changed, 11 insertions(+), 11 deletions(-)

diff --git a/drivers/pci/controller/pcie-xilinx-nwl.c b/drivers/pci/controller/pcie-xilinx-nwl.c
index ce881baac6d8..c0a60cebdb2e 100644
--- a/drivers/pci/controller/pcie-xilinx-nwl.c
+++ b/drivers/pci/controller/pcie-xilinx-nwl.c
@@ -267,37 +267,37 @@ static irqreturn_t nwl_pcie_misc_handler(int irq, void *data)
 		return IRQ_NONE;
 
 	if (misc_stat & MSGF_MISC_SR_RXMSG_OVER)
-		dev_err(dev, "Received Message FIFO Overflow\n");
+		dev_err_ratelimited(dev, "Received Message FIFO Overflow\n");
 
 	if (misc_stat & MSGF_MISC_SR_SLAVE_ERR)
-		dev_err(dev, "Slave error\n");
+		dev_err_ratelimited(dev, "Slave error\n");
 
 	if (misc_stat & MSGF_MISC_SR_MASTER_ERR)
-		dev_err(dev, "Master error\n");
+		dev_err_ratelimited(dev, "Master error\n");
 
 	if (misc_stat & MSGF_MISC_SR_I_ADDR_ERR)
-		dev_err(dev, "In Misc Ingress address translation error\n");
+		dev_err_ratelimited(dev, "In Misc Ingress address translation error\n");
 
 	if (misc_stat & MSGF_MISC_SR_E_ADDR_ERR)
-		dev_err(dev, "In Misc Egress address translation error\n");
+		dev_err_ratelimited(dev, "In Misc Egress address translation error\n");
 
 	if (misc_stat & MSGF_MISC_SR_FATAL_AER)
-		dev_err(dev, "Fatal Error in AER Capability\n");
+		dev_err_ratelimited(dev, "Fatal Error in AER Capability\n");
 
 	if (misc_stat & MSGF_MISC_SR_NON_FATAL_AER)
-		dev_err(dev, "Non-Fatal Error in AER Capability\n");
+		dev_err_ratelimited(dev, "Non-Fatal Error in AER Capability\n");
 
 	if (misc_stat & MSGF_MISC_SR_CORR_AER)
-		dev_err(dev, "Correctable Error in AER Capability\n");
+		dev_err_ratelimited(dev, "Correctable Error in AER Capability\n");
 
 	if (misc_stat & MSGF_MISC_SR_UR_DETECT)
-		dev_err(dev, "Unsupported request Detected\n");
+		dev_err_ratelimited(dev, "Unsupported request Detected\n");
 
 	if (misc_stat & MSGF_MISC_SR_NON_FATAL_DEV)
-		dev_err(dev, "Non-Fatal Error Detected\n");
+		dev_err_ratelimited(dev, "Non-Fatal Error Detected\n");
 
 	if (misc_stat & MSGF_MISC_SR_FATAL_DEV)
-		dev_err(dev, "Fatal Error Detected\n");
+		dev_err_ratelimited(dev, "Fatal Error Detected\n");
 
 	if (misc_stat & MSGF_MISC_SR_LINK_AUTO_BWIDTH)
 		dev_info(dev, "Link Autonomous Bandwidth Management Status bit set\n");
-- 
2.35.1.1320.gc452695387.dirty