From: Krzysztof Kozlowski krzk@kernel.org
[ Upstream commit 3c525b69e8c1a9a6944e976603c7a1a713e728f9 ]
During shutdown, the driver should unregister the SPI controller and stop the hardware. Otherwise the dspi_transfer_one_message() could wait on completion infinitely.
Additionally, calling spi_unregister_controller() first in device shutdown reverse-matches the probe function, where SPI controller is registered at the end.
Fixes: dc234825997e ("spi: spi-fsl-dspi: Adding shutdown hook") Reported-by: Vladimir Oltean olteanv@gmail.com Signed-off-by: Krzysztof Kozlowski krzk@kernel.org Tested-by: Vladimir Oltean vladimir.oltean@nxp.com Reviewed-by: Vladimir Oltean vladimir.oltean@nxp.com Cc: stable@vger.kernel.org Link: https://lore.kernel.org/r/20200622110543.5035-2-krzk@kernel.org Signed-off-by: Mark Brown broonie@kernel.org Signed-off-by: Sasha Levin sashal@kernel.org --- drivers/spi/spi-fsl-dspi.c | 15 +-------------- 1 file changed, 1 insertion(+), 14 deletions(-)
diff --git a/drivers/spi/spi-fsl-dspi.c b/drivers/spi/spi-fsl-dspi.c index dabff9718d426..cce9e34306787 100644 --- a/drivers/spi/spi-fsl-dspi.c +++ b/drivers/spi/spi-fsl-dspi.c @@ -1097,20 +1097,7 @@ static int dspi_remove(struct platform_device *pdev)
static void dspi_shutdown(struct platform_device *pdev) { - struct spi_controller *ctlr = platform_get_drvdata(pdev); - struct fsl_dspi *dspi = spi_controller_get_devdata(ctlr); - - /* Disable RX and TX */ - regmap_update_bits(dspi->regmap, SPI_MCR, - SPI_MCR_DIS_TXF | SPI_MCR_DIS_RXF, - SPI_MCR_DIS_TXF | SPI_MCR_DIS_RXF); - - /* Stop Running */ - regmap_update_bits(dspi->regmap, SPI_MCR, SPI_MCR_HALT, SPI_MCR_HALT); - - dspi_release_dma(dspi); - clk_disable_unprepare(dspi->clk); - spi_unregister_controller(dspi->master); + dspi_remove(pdev); }
static struct platform_driver fsl_dspi_driver = {