linux-kernel - RE: [PATCH] swsmu/amdgpu_smu: Fix the wrong if-condition

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Message-ID: <DM6PR12MB261939876DAFDBA3B25DEB17E40F9@DM6PR12MB2619.namprd12.prod.outlook.com>
Date:   Thu, 24 Nov 2022 10:10:22 +0000
From:   "Quan, Evan" <Evan.Quan@....com>
To:     Yu Songping <yusongping@...wei.com>,
        "airlied@...il.com" <airlied@...il.com>,
        "daniel@...ll.ch" <daniel@...ll.ch>
CC:     "dri-devel@...ts.freedesktop.org" <dri-devel@...ts.freedesktop.org>,
        "amd-gfx@...ts.freedesktop.org" <amd-gfx@...ts.freedesktop.org>,
        "linux-kernel@...r.kernel.org" <linux-kernel@...r.kernel.org>
Subject: RE: [PATCH] swsmu/amdgpu_smu: Fix the wrong if-condition

[AMD Official Use Only - General]

Reviewed-by: Evan Quan <evan.quan@....com>

> -----Original Message-----
> From: amd-gfx <amd-gfx-bounces@...ts.freedesktop.org> On Behalf Of Yu
> Songping
> Sent: Thursday, November 24, 2022 9:53 AM
> To: airlied@...il.com; daniel@...ll.ch
> Cc: dri-devel@...ts.freedesktop.org; amd-gfx@...ts.freedesktop.org; linux-
> kernel@...r.kernel.org
> Subject: [PATCH] swsmu/amdgpu_smu: Fix the wrong if-condition
> 
> The logical operator '&&' will make
> smu->ppt_funcs->set_gfx_power_up_by_imu segment fault when
> ppt_funcs is
> smu->NULL.
> 
> Signed-off-by: Yu Songping <yusongping@...wei.com>
> ---
>  drivers/gpu/drm/amd/pm/swsmu/amdgpu_smu.c | 2 +-
>  1 file changed, 1 insertion(+), 1 deletion(-)
> 
> diff --git a/drivers/gpu/drm/amd/pm/swsmu/amdgpu_smu.c
> b/drivers/gpu/drm/amd/pm/swsmu/amdgpu_smu.c
> index b880f4d7d67e..1cb728b0b7ee 100644
> --- a/drivers/gpu/drm/amd/pm/swsmu/amdgpu_smu.c
> +++ b/drivers/gpu/drm/amd/pm/swsmu/amdgpu_smu.c
> @@ -161,7 +161,7 @@ int smu_get_dpm_freq_range(struct smu_context
> *smu,
> 
>  int smu_set_gfx_power_up_by_imu(struct smu_context *smu)  {
> -	if (!smu->ppt_funcs && !smu->ppt_funcs-
> >set_gfx_power_up_by_imu)
> +	if (!smu->ppt_funcs || !smu->ppt_funcs-
> >set_gfx_power_up_by_imu)
>  		return -EOPNOTSUPP;
> 
>  	return smu->ppt_funcs->set_gfx_power_up_by_imu(smu);
> --
> 2.17.1

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