linux-kernel - [PATCH 3/3] spi: tegra210-quad: add rate limiting and simplify timeout error message

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Message-Id: <20250317-tegra-v1-3-78474efc0386@debian.org>
Date: Mon, 17 Mar 2025 08:44:03 -0700
From: Breno Leitao <leitao@...ian.org>
To: Thierry Reding <thierry.reding@...il.com>, 
 Jonathan Hunter <jonathanh@...dia.com>, 
 Sowjanya Komatineni <skomatineni@...dia.com>, 
 Laxman Dewangan <ldewangan@...dia.com>, Mark Brown <broonie@...nel.org>
Cc: linux-tegra@...r.kernel.org, linux-spi@...r.kernel.org, 
 linux-kernel@...r.kernel.org, rmikey@...a.com, 
 Breno Leitao <leitao@...ian.org>, kernel-team@...a.com
Subject: [PATCH 3/3] spi: tegra210-quad: add rate limiting and simplify
 timeout error message

On malfunctioning hardware, timeout error messages can appear thousands
of times, creating unnecessary system pressure and log bloat. This patch
makes two improvements:

1. Replace dev_err() with dev_err_ratelimited() to prevent log flooding
   when hardware errors persist
2. Remove the redundant timeout value parameter from the error message,
   as 'ret' is always zero in this error path

These changes reduce logging overhead while maintaining necessary error
reporting for debugging purposes.

Signed-off-by: Breno Leitao <leitao@...ian.org>
---
 drivers/spi/spi-tegra210-quad.c | 4 ++--
 1 file changed, 2 insertions(+), 2 deletions(-)

diff --git a/drivers/spi/spi-tegra210-quad.c b/drivers/spi/spi-tegra210-quad.c
index 7c10b1272b0ad..e8dd1c061a49b 100644
--- a/drivers/spi/spi-tegra210-quad.c
+++ b/drivers/spi/spi-tegra210-quad.c
@@ -1118,8 +1118,8 @@ static int tegra_qspi_combined_seq_xfer(struct tegra_qspi *tqspi,
 					QSPI_DMA_TIMEOUT);
 
 			if (WARN_ON_ONCE(ret == 0)) {
-				dev_err(tqspi->dev, "QSPI Transfer failed with timeout: %d\n",
-					ret);
+				dev_err_ratelimited(tqspi->dev,
+						    "QSPI Transfer failed with timeout\n");
 				if (tqspi->is_curr_dma_xfer &&
 				    (tqspi->cur_direction & DATA_DIR_TX))
 					dmaengine_terminate_all

-- 
2.47.1