On Wed, Mar 27, 2019 at 06:07:06AM +0000, Anson Huang wrote:
> SNVS IRQ is requested before necessary driver data initialized,
> if there is a pending IRQ during driver probe phase, kernel
> NULL pointer panic will occur in IRQ handler. To avoid such
> scenario, just initialize necessary driver data before enabling
> IRQ. This patch is inspired by NXP's internal kernel tree.
>
> Fixes: d3dc6e232215 ("input: keyboard: imx: add snvs power key driver")
> Signed-off-by: Anson Huang <Anson.Huang@xxxxxxx>
Applied, thank you.
> ---
> Changes since V1:
> - move the platform data initialization to before IRQ enable instead of moving the IRQ enable
> to the end of probe function.
> ---
> drivers/input/keyboard/snvs_pwrkey.c | 6 +++---
> 1 file changed, 3 insertions(+), 3 deletions(-)
>
> diff --git a/drivers/input/keyboard/snvs_pwrkey.c b/drivers/input/keyboard/snvs_pwrkey.c
> index effb632..4c67cf3 100644
> --- a/drivers/input/keyboard/snvs_pwrkey.c
> +++ b/drivers/input/keyboard/snvs_pwrkey.c
> @@ -148,6 +148,9 @@ static int imx_snvs_pwrkey_probe(struct platform_device *pdev)
> return error;
> }
>
> + pdata->input = input;
> + platform_set_drvdata(pdev, pdata);
> +
> error = devm_request_irq(&pdev->dev, pdata->irq,
> imx_snvs_pwrkey_interrupt,
> 0, pdev->name, pdev);
> @@ -163,9 +166,6 @@ static int imx_snvs_pwrkey_probe(struct platform_device *pdev)
> return error;
> }
>
> - pdata->input = input;
> - platform_set_drvdata(pdev, pdata);
> -
> device_init_wakeup(&pdev->dev, pdata->wakeup);
>
> return 0;
> --
> 2.7.4
>
--
Dmitry
