The patch below does not apply to the 5.10-stable tree. If someone wants it applied there, or to any other stable or longterm tree, then please email the backport, including the original git commit id to stable@vger.kernel.org.
To reproduce the conflict and resubmit, you may use the following commands:
git fetch https://git.kernel.org/pub/scm/linux/kernel/git/stable/linux.git/ linux-5.10.y git checkout FETCH_HEAD git cherry-pick -x 40369bfe717e96e26650eeecfa5a6363563df6e4 # <resolve conflicts, build, test, etc.> git commit -s git send-email --to 'stable@vger.kernel.org' --in-reply-to '2025041725-clustered-unruly-09ab@gregkh' --subject-prefix 'PATCH 5.10.y' HEAD^..
Possible dependencies:
thanks,
greg k-h
------------------ original commit in Linus's tree ------------------
From 40369bfe717e96e26650eeecfa5a6363563df6e4 Mon Sep 17 00:00:00 2001 From: Han Xu han.xu@nxp.com Date: Wed, 26 Mar 2025 17:41:51 -0500 Subject: [PATCH] spi: fsl-qspi: use devm function instead of driver remove
Driver use devm APIs to manage clk/irq/resources and register the spi controller, but the legacy remove function will be called first during device detach and trigger kernel panic. Drop the remove function and use devm_add_action_or_reset() for driver cleanup to ensure the release sequence.
Trigger kernel panic on i.MX8MQ by echo 30bb0000.spi >/sys/bus/platform/drivers/fsl-quadspi/unbind
Cc: stable@vger.kernel.org Fixes: 8fcb830a00f0 ("spi: spi-fsl-qspi: use devm_spi_register_controller") Reported-by: Kevin Hao haokexin@gmail.com Signed-off-by: Han Xu han.xu@nxp.com Reviewed-by: Frank Li Frank.Li@nxp.com Link: https://patch.msgid.link/20250326224152.2147099-1-han.xu@nxp.com Signed-off-by: Mark Brown broonie@kernel.org
diff --git a/drivers/spi/spi-fsl-qspi.c b/drivers/spi/spi-fsl-qspi.c index 355e6a39fb41..5c59fddb32c1 100644 --- a/drivers/spi/spi-fsl-qspi.c +++ b/drivers/spi/spi-fsl-qspi.c @@ -844,6 +844,19 @@ static const struct spi_controller_mem_caps fsl_qspi_mem_caps = { .per_op_freq = true, };
+static void fsl_qspi_cleanup(void *data) +{ + struct fsl_qspi *q = data; + + /* disable the hardware */ + qspi_writel(q, QUADSPI_MCR_MDIS_MASK, q->iobase + QUADSPI_MCR); + qspi_writel(q, 0x0, q->iobase + QUADSPI_RSER); + + fsl_qspi_clk_disable_unprep(q); + + mutex_destroy(&q->lock); +} + static int fsl_qspi_probe(struct platform_device *pdev) { struct spi_controller *ctlr; @@ -934,6 +947,10 @@ static int fsl_qspi_probe(struct platform_device *pdev)
ctlr->dev.of_node = np;
+ ret = devm_add_action_or_reset(dev, fsl_qspi_cleanup, q); + if (ret) + goto err_destroy_mutex; + ret = devm_spi_register_controller(dev, ctlr); if (ret) goto err_destroy_mutex; @@ -953,19 +970,6 @@ static int fsl_qspi_probe(struct platform_device *pdev) return ret; }
-static void fsl_qspi_remove(struct platform_device *pdev) -{ - struct fsl_qspi *q = platform_get_drvdata(pdev); - - /* disable the hardware */ - qspi_writel(q, QUADSPI_MCR_MDIS_MASK, q->iobase + QUADSPI_MCR); - qspi_writel(q, 0x0, q->iobase + QUADSPI_RSER); - - fsl_qspi_clk_disable_unprep(q); - - mutex_destroy(&q->lock); -} - static int fsl_qspi_suspend(struct device *dev) { return 0; @@ -1003,7 +1007,6 @@ static struct platform_driver fsl_qspi_driver = { .pm = &fsl_qspi_pm_ops, }, .probe = fsl_qspi_probe, - .remove = fsl_qspi_remove, }; module_platform_driver(fsl_qspi_driver);