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SubjectRe: [PATCH v2] drm/bridge: tpd12s015: Fix irq registering in tpd12s015_probe
Hi Yue,

Thank you for the patch.

On Mon, Nov 02, 2020 at 10:30:24PM +0800, YueHaibing wrote:
> gpiod_to_irq() return negative value in case of error,
> the existing code doesn't handle negative error codes.
> If the HPD gpio supports IRQs (gpiod_to_irq returns a
> valid number), we use the IRQ. If it doesn't (gpiod_to_irq
> returns an error), it gets polled via detect().
>
> Fixes: cff5e6f7e83f ("drm/bridge: Add driver for the TI TPD12S015 HDMI level shifter")
> Signed-off-by: YueHaibing <yuehaibing@huawei.com>

Reviewed-by: Laurent Pinchart <laurent.pinchart@ideasonboard.com>

> ---
> v2: Add checking for >= 0 and update commit message
> ---
> drivers/gpu/drm/bridge/ti-tpd12s015.c | 2 +-
> 1 file changed, 1 insertion(+), 1 deletion(-)
>
> diff --git a/drivers/gpu/drm/bridge/ti-tpd12s015.c b/drivers/gpu/drm/bridge/ti-tpd12s015.c
> index 514cbf0eac75..e0e015243a60 100644
> --- a/drivers/gpu/drm/bridge/ti-tpd12s015.c
> +++ b/drivers/gpu/drm/bridge/ti-tpd12s015.c
> @@ -160,7 +160,7 @@ static int tpd12s015_probe(struct platform_device *pdev)
>
> /* Register the IRQ if the HPD GPIO is IRQ-capable. */
> tpd->hpd_irq = gpiod_to_irq(tpd->hpd_gpio);
> - if (tpd->hpd_irq) {
> + if (tpd->hpd_irq >= 0) {
> ret = devm_request_threaded_irq(&pdev->dev, tpd->hpd_irq, NULL,
> tpd12s015_hpd_isr,
> IRQF_TRIGGER_RISING |

--
Regards,

Laurent Pinchart

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