linux-kernel - Re: [PATCH v2 drm-dp 03/10] drm/hisilicon/hibmc: fix irq

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Message-ID: <wdxfjpszopfpvjeu2ma7moun2raxgaamnw3tp4d4st5cz6onnt@hbjxnienyaaq>
Date: Sat, 28 Jun 2025 19:32:49 +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 v2 drm-dp 03/10] drm/hisilicon/hibmc: fix irq_request()'s
 irq name variable is local

On Fri, Jun 20, 2025 at 05:30:57PM +0800, Yongbang Shi wrote:
> From: Baihan Li <libaihan@...wei.com>
> 
> The local variable is passed in request_irq (), and there will be use
> after free problem, which will make request_irq failed. Using the global
> irq name instead of it to fix.
> 
> Fixes: b11bc1ae4658 ("drm/hisilicon/hibmc: Add MSI irq getting and requesting for HPD")
> Signed-off-by: Baihan Li <libaihan@...wei.com>
> Signed-off-by: Yongbang Shi <shiyongbang@...wei.com>
> ---
> ChangeLog:
> v1 -> v2:
>   - add explanations in commit, suggested by Dmitry Baryshkov.
> ---
>  drivers/gpu/drm/hisilicon/hibmc/hibmc_drm_drv.c | 10 +++-------
>  1 file changed, 3 insertions(+), 7 deletions(-)
> 

Reviewed-by: Dmitry Baryshkov <dmitry.baryshkov@....qualcomm.com>


-- 
With best wishes
Dmitry