linux-kernel - Re: [PATCH drm-dp 03/10] drm/hisilicon/hibmc: fix irq

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Message-ID: <oof3yrny3x5vglnjvcsz6brpn2a4l2nkmpepnykojqquytfj56@vz5sk7coojhw>
Date: Sun, 8 Jun 2025 14:43:22 +0300
From: Dmitry Baryshkov <dmitry.baryshkov@....qualcomm.com>
To: Yongbang Shi <shiyongbang@...wei.com>
Cc: xinliang.liu@...aro.org, tiantao6@...ilicon.com,
        maarten.lankhorst@...ux.intel.com, mripard@...nel.org,
        tzimmermann@...e.de, airlied@...il.com, daniel@...ll.ch,
        kong.kongxinwei@...ilicon.com, liangjian010@...wei.com,
        chenjianmin@...wei.com, lidongming5@...wei.com, libaihan@...wei.com,
        shenjian15@...wei.com, shaojijie@...wei.com,
        jani.nikula@...ux.intel.com, dri-devel@...ts.freedesktop.org,
        linux-kernel@...r.kernel.org
Subject: Re: [PATCH drm-dp 03/10] drm/hisilicon/hibmc: fix irq_request()'s
 irq name variable is local

On Fri, May 30, 2025 at 05:54:25PM +0800, Yongbang Shi wrote:
> From: Baihan Li <libaihan@...wei.com>
> 
> The local variable of irq name is passed to devm_request_threaded_irq(),
> which will make request_irq failed. Using the global irq name instead
> of it to fix.

This doesn't explain, why does it fail and which IRQ name is actually
expected.

> 
> Fixes: b11bc1ae4658 ("drm/hisilicon/hibmc: Add MSI irq getting and requesting for HPD")
> Signed-off-by: Baihan Li <libaihan@...wei.com>
> ---
>  drivers/gpu/drm/hisilicon/hibmc/hibmc_drm_drv.c | 10 +++-------
>  1 file changed, 3 insertions(+), 7 deletions(-)
> 
> diff --git a/drivers/gpu/drm/hisilicon/hibmc/hibmc_drm_drv.c b/drivers/gpu/drm/hisilicon/hibmc/hibmc_drm_drv.c
> index 768b97f9e74a..4cdcc34070ee 100644
> --- a/drivers/gpu/drm/hisilicon/hibmc/hibmc_drm_drv.c
> +++ b/drivers/gpu/drm/hisilicon/hibmc/hibmc_drm_drv.c
> @@ -32,7 +32,7 @@
>  
>  DEFINE_DRM_GEM_FOPS(hibmc_fops);
>  
> -static const char *g_irqs_names_map[HIBMC_MAX_VECTORS] = { "vblank", "hpd" };
> +static const char *g_irqs_names_map[HIBMC_MAX_VECTORS] = { "hibmc-vblank", "hibmc-hpd" };

Please point to the corresponding IRQ names as currently implemented in
the upstream kernel.

>  
>  static irqreturn_t hibmc_interrupt(int irq, void *arg)
>  {

-- 
With best wishes
Dmitry