From: Sascha Hauer <s.ha...@pengutronix.de> [ Upstream commit 530b5affc675ade5db4a03f04ed7cd66806c8a1a ]
spi_unregister_controller() not only unregisters the controller, but also frees the controller. This will free the driver data with it, so we must not access it later dspi_remove(). Solve this by allocating the driver data separately from the SPI controller. Signed-off-by: Sascha Hauer <s.ha...@pengutronix.de> Link: https://lore.kernel.org/r/20200923131026.20707-1-s.ha...@pengutronix.de Signed-off-by: Mark Brown <broo...@kernel.org> Signed-off-by: Sasha Levin <sas...@kernel.org> --- drivers/spi/spi-fsl-dspi.c | 12 +++++++----- 1 file changed, 7 insertions(+), 5 deletions(-) diff --git a/drivers/spi/spi-fsl-dspi.c b/drivers/spi/spi-fsl-dspi.c index 91c6affe139c9..aae9f9a7aea6c 100644 --- a/drivers/spi/spi-fsl-dspi.c +++ b/drivers/spi/spi-fsl-dspi.c @@ -1273,11 +1273,14 @@ static int dspi_probe(struct platform_device *pdev) void __iomem *base; bool big_endian; - ctlr = spi_alloc_master(&pdev->dev, sizeof(struct fsl_dspi)); + dspi = devm_kzalloc(&pdev->dev, sizeof(*dspi), GFP_KERNEL); + if (!dspi) + return -ENOMEM; + + ctlr = spi_alloc_master(&pdev->dev, 0); if (!ctlr) return -ENOMEM; - dspi = spi_controller_get_devdata(ctlr); dspi->pdev = pdev; dspi->ctlr = ctlr; @@ -1414,7 +1417,7 @@ static int dspi_probe(struct platform_device *pdev) if (dspi->devtype_data->trans_mode != DSPI_DMA_MODE) ctlr->ptp_sts_supported = true; - platform_set_drvdata(pdev, ctlr); + platform_set_drvdata(pdev, dspi); ret = spi_register_controller(ctlr); if (ret != 0) { @@ -1437,8 +1440,7 @@ static int dspi_probe(struct platform_device *pdev) static int dspi_remove(struct platform_device *pdev) { - struct spi_controller *ctlr = platform_get_drvdata(pdev); - struct fsl_dspi *dspi = spi_controller_get_devdata(ctlr); + struct fsl_dspi *dspi = platform_get_drvdata(pdev); /* Disconnect from the SPI framework */ spi_unregister_controller(dspi->ctlr); -- 2.25.1
