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

From: Lukas Wunner
Date: Sun Jan 16 2022 - 07:52:10 EST


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