Re: [PATCH v2] spi: stm32-qspi: Update spi registering

[Lukas Wunner <lukas@xxxxxxxxx>]

On Wed, Jan 12, 2022 at 03:44:24PM +0100, patrice.chotard@xxxxxxxxxxx wrote:
> diff --git a/drivers/spi/spi-stm32-qspi.c b/drivers/spi/spi-stm32-qspi.c
> index 514337c86d2c..09839a3dbb26 100644
> --- a/drivers/spi/spi-stm32-qspi.c
> +++ b/drivers/spi/spi-stm32-qspi.c
> @@ -688,7 +688,7 @@ static int stm32_qspi_probe(struct platform_device *pdev)
>  	struct resource *res;
>  	int ret, irq;
>  
> -	ctrl = spi_alloc_master(dev, sizeof(*qspi));
> +	ctrl = devm_spi_alloc_master(dev, sizeof(*qspi));
>  	if (!ctrl)
>  		return -ENOMEM;
>  
> @@ -784,7 +784,7 @@ static int stm32_qspi_probe(struct platform_device *pdev)
>  	pm_runtime_enable(dev);
>  	pm_runtime_get_noresume(dev);
>  
> -	ret = devm_spi_register_master(dev, ctrl);
> +	ret = spi_register_master(ctrl);
>  	if (ret)
>  		goto err_pm_runtime_free;
>

Unfortunately this patch is still not correct:  It introduces a
double free in the probe error path.

You need to remove this...

err_master_put:
	spi_master_put(qspi->ctrl);

...and replace all the gotos in stm32_qspi_probe() which jump
to the err_master_put label with a return statement.

Thanks,

Lukas