linux-kernel - Re: [PATCH] drm/amd/display: Fix && vs || typos

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Date: Fri, 9 Feb 2024 12:13:55 -0500
From: Hamza Mahfooz <hamza.mahfooz@....com>
To: Dan Carpenter <dan.carpenter@...aro.org>,
 Srinivasan Shanmugam <srinivasan.shanmugam@....com>
Cc: Harry Wentland <harry.wentland@....com>, Leo Li <sunpeng.li@....com>,
 Rodrigo Siqueira <Rodrigo.Siqueira@....com>,
 Alex Deucher <alexander.deucher@....com>,
 Christian König <christian.koenig@....com>,
 "Pan, Xinhui" <Xinhui.Pan@....com>, David Airlie <airlied@...il.com>,
 Daniel Vetter <daniel@...ll.ch>,
 Nicholas Kazlauskas <nicholas.kazlauskas@....com>,
 Anthony Koo <Anthony.Koo@....com>, Josip Pavic <Josip.Pavic@....com>,
 Leon Huang <Leon.Huang1@....com>, Mounika Adhuri <moadhuri@....com>,
 Lewis Huang <lewis.huang@....com>, amd-gfx@...ts.freedesktop.org,
 dri-devel@...ts.freedesktop.org, linux-kernel@...r.kernel.org,
 kernel-janitors@...r.kernel.org
Subject: Re: [PATCH] drm/amd/display: Fix && vs || typos

On 2/9/24 08:02, Dan Carpenter wrote:
> These ANDs should be ORs or it will lead to a NULL dereference.
> 
> Fixes: fb5a3d037082 ("drm/amd/display: Add NULL test for 'timing generator' in 'dcn21_set_pipe()'")
> Fixes: 886571d217d7 ("drm/amd/display: Fix 'panel_cntl' could be null in 'dcn21_set_backlight_level()'")
> Signed-off-by: Dan Carpenter <dan.carpenter@...aro.org>

Applied, thanks!

> ---
>   drivers/gpu/drm/amd/display/dc/hwss/dcn21/dcn21_hwseq.c | 4 ++--
>   1 file changed, 2 insertions(+), 2 deletions(-)
> 
> diff --git a/drivers/gpu/drm/amd/display/dc/hwss/dcn21/dcn21_hwseq.c b/drivers/gpu/drm/amd/display/dc/hwss/dcn21/dcn21_hwseq.c
> index 5c7f380a84f9..7252f5f781f0 100644
> --- a/drivers/gpu/drm/amd/display/dc/hwss/dcn21/dcn21_hwseq.c
> +++ b/drivers/gpu/drm/amd/display/dc/hwss/dcn21/dcn21_hwseq.c
> @@ -211,7 +211,7 @@ void dcn21_set_pipe(struct pipe_ctx *pipe_ctx)
>   	struct dmcu *dmcu = pipe_ctx->stream->ctx->dc->res_pool->dmcu;
>   	uint32_t otg_inst;
>   
> -	if (!abm && !tg && !panel_cntl)
> +	if (!abm || !tg || !panel_cntl)
>   		return;
>   
>   	otg_inst = tg->inst;
> @@ -245,7 +245,7 @@ bool dcn21_set_backlight_level(struct pipe_ctx *pipe_ctx,
>   	struct panel_cntl *panel_cntl = pipe_ctx->stream->link->panel_cntl;
>   	uint32_t otg_inst;
>   
> -	if (!abm && !tg && !panel_cntl)
> +	if (!abm || !tg || !panel_cntl)
>   		return false;
>   
>   	otg_inst = tg->inst;
-- 
Hamza