28.01.2022 19:18, Miaoqian Lin пишет:
> This func misses checking for platform_get_irq()'s call and may passes the
> negative error codes to request_threaded_irq(), which takes unsigned IRQ #,
> causing it to fail with -EINVAL, overriding an original error code.
> Stop calling request_threaded_irq() with invalid IRQ #s.
>
> Fixes: e4bb903fda0e ("spi: tegra20-slink: Improve runtime PM usage")
I don't see how this patch is related to e4bb903fda0e. This tag is
incorrect and should be removed.
> Signed-off-by: Miaoqian Lin <linmq006@xxxxxxxxx>
> ---
> Changes in v2:
> - fix wrong func name in commit message.
> ---
> drivers/spi/spi-tegra20-slink.c | 5 +++++
> 1 file changed, 5 insertions(+)
>
> diff --git a/drivers/spi/spi-tegra20-slink.c b/drivers/spi/spi-tegra20-slink.c
> index 2a03739a0c60..0eea35882777 100644
> --- a/drivers/spi/spi-tegra20-slink.c
> +++ b/drivers/spi/spi-tegra20-slink.c
> @@ -1100,6 +1100,11 @@ static int tegra_slink_probe(struct platform_device *pdev)
> reset_control_deassert(tspi->rst);
>
> spi_irq = platform_get_irq(pdev, 0);
> + if (spi_irq < 0) {
> + dev_err(&pdev->dev, "Unable to request IRQ: %d\n", ret);
The "ret" isn't assigned to spi_irq in the error message.
Moreover, platform_get_irq() already prints error message [1] by itself.
The duplicated message is unnecessary and should be removed.
[1]
https://elixir.bootlin.com/linux/v5.17-rc1/source/drivers/base/platform.c#L256
