linux-kernel - Re: [PATCH v2 1/1] drm/msm/dpu: Fix error return code in dpu_mdss

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Date:   Mon, 10 May 2021 09:55:09 -0700
From:   Stephen Boyd <swboyd@...omium.org>
To:     Daniel Vetter <daniel@...ll.ch>, David Airlie <airlied@...ux.ie>,
        Rob Clark <robdclark@...il.com>, Sean Paul <sean@...rly.run>,
        Zhen Lei <thunder.leizhen@...wei.com>,
        dri-devel <dri-devel@...ts.freedesktop.org>,
        freedreno <freedreno@...ts.freedesktop.org>,
        linux-arm-msm <linux-arm-msm@...r.kernel.org>,
        linux-kernel <linux-kernel@...r.kernel.org>
Subject: Re: [PATCH v2 1/1] drm/msm/dpu: Fix error return code in dpu_mdss_init()

Quoting Zhen Lei (2021-05-09 23:38:05)
> The error code returned by platform_get_irq() is stored in 'irq', it's
> forgotten to be copied to 'ret' before being returned. As a result, the
> value 0 of 'ret' is returned incorrectly.
>
> After the above fix is completed, initializing the local variable 'ret'
> to 0 is no longer needed, remove it.
>
> In addition, when dpu_mdss_init() is successfully returned, the value of
> 'ret' is always 0. Therefore, replace "return ret" with "return 0" to make
> the code clearer.
>
> Fixes: 070e64dc1bbc ("drm/msm/dpu: Convert to a chained irq chip")
> Reported-by: Hulk Robot <hulkci@...wei.com>
> Signed-off-by: Zhen Lei <thunder.leizhen@...wei.com>
> ---

Reviewed-by: Stephen Boyd <swboyd@...omium.org>