On Tue, Sep 22, 2020 at 11:32:23AM +0200, Sascha Hauer wrote:

> @@ -1440,9 +1440,6 @@ 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);
>  
> -	/* Disconnect from the SPI framework */
> -	spi_unregister_controller(dspi->ctlr);
> -
>  	/* Disable RX and TX */
>  	regmap_update_bits(dspi->regmap, SPI_MCR,
>  			   SPI_MCR_DIS_TXF | SPI_MCR_DIS_RXF,

Is this fix safe - what happens if we start another transaction between
disabling RX/TX and the unregistration taking effect?  Similar concerns
apply to some of the other patches.