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SubjectRe: [Freedreno] [PATCH v3] drm/msm/dsi: Add missing check for alloc_ordered_workqueue
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On 1/9/2023 6:16 PM, Jiasheng Jiang wrote:
> Add check for the return value of alloc_ordered_workqueue as it may return
> NULL pointer and cause NULL pointer dereference.
>
> Signed-off-by: Jiasheng Jiang <jiasheng@iscas.ac.cn>
Reviewed-by: Abhinav Kumar <quic_abhinavk@quicinc.com>
> ---
> Changelog:
>
> v2 -> v3:
>
> 1. Simply return -ENOMEM instead of using ret.
> 2. No change of the "goto fail".
>
> v1 -> v2:
>
> 1. Change the "goto fail" into "return ret" and drop the "fail" label.
> ---
> drivers/gpu/drm/msm/dsi/dsi_host.c | 3 +++
> 1 file changed, 3 insertions(+)
>
> diff --git a/drivers/gpu/drm/msm/dsi/dsi_host.c b/drivers/gpu/drm/msm/dsi/dsi_host.c
> index 89aadd3b3202..f167a45f1fbd 100644
> --- a/drivers/gpu/drm/msm/dsi/dsi_host.c
> +++ b/drivers/gpu/drm/msm/dsi/dsi_host.c
> @@ -1977,6 +1977,9 @@ int msm_dsi_host_init(struct msm_dsi *msm_dsi)
>
> /* setup workqueue */
> msm_host->workqueue = alloc_ordered_workqueue("dsi_drm_work", 0);
> + if (!msm_host->workqueue)
> + return -ENOMEM;
> +
> INIT_WORK(&msm_host->err_work, dsi_err_worker);
>
> msm_dsi->id = msm_host->id;

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