linux-kernel - [PATCH linux-next] drm/amdgpu/vcn: Return void from the stop_dbg

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Message-Id: <20220815183425.14867-1-khalid.masum.92@gmail.com>
Date:   Tue, 16 Aug 2022 00:34:25 +0600
From:   Khalid Masum <khalid.masum.92@...il.com>
To:     Ruijing Dong <ruijing.dong@....com>, amd-gfx@...ts.freedesktop.org,
        dri-devel@...ts.freedesktop.org, linux-kernel@...r.kernel.org
Cc:     Alex Deucher <alexander.deucher@....com>,
        Christian König <christian.koenig@....com>,
        Pan Xinhui <Xinhui.Pan@....com>,
        David Airlie <airlied@...ux.ie>,
        Daniel Vetter <daniel@...ll.ch>, James Zhu <James.Zhu@....com>,
        Leo Liu <leo.liu@....com>, Sonny Jiang <sonny.jiang@....com>,
        Wan Jiabing <wanjiabing@...o.com>,
        Greg Kroah-Hartman <gregkh@...uxfoundation.org>,
        Khalid Masum <khalid.masum.92@...il.com>
Subject: [PATCH linux-next] drm/amdgpu/vcn: Return void from the stop_dbg_mode

There is no point in returning an int here. It only returns 0 which
the caller never uses. Therefore return void and remove the unnecessary 
assignment.

Addresses-Coverity: 1504988 ("Unused value")
Fixes: 8da1170a16e4 ("drm/amdgpu: add VCN4 ip block support")
Suggested-by: Ruijing Dong <ruijing.dong@....com>
Suggested-by: Greg Kroah-Hartman <gregkh@...uxfoundation.org>
Signed-off-by: Khalid Masum <khalid.masum.92@...il.com>
---
Past discussions:
- V1 Link: https://lore.kernel.org/lkml/20220815070056.10816-1-khalid.masum.92@gmail.com/

Changes since V1:
- Make stop_dbg_mode return void
- Update commit description

 drivers/gpu/drm/amd/amdgpu/vcn_v4_0.c | 5 ++---
 1 file changed, 2 insertions(+), 3 deletions(-)

diff --git a/drivers/gpu/drm/amd/amdgpu/vcn_v4_0.c b/drivers/gpu/drm/amd/amdgpu/vcn_v4_0.c
index ca14c3ef742e..fb2d74f30448 100644
--- a/drivers/gpu/drm/amd/amdgpu/vcn_v4_0.c
+++ b/drivers/gpu/drm/amd/amdgpu/vcn_v4_0.c
@@ -1115,7 +1115,7 @@ static int vcn_v4_0_start(struct amdgpu_device *adev)
  *
  * Stop VCN block with dpg mode
  */
-static int vcn_v4_0_stop_dpg_mode(struct amdgpu_device *adev, int inst_idx)
+static void vcn_v4_0_stop_dpg_mode(struct amdgpu_device *adev, int inst_idx)
 {
 	uint32_t tmp;
 
@@ -1133,7 +1133,6 @@ static int vcn_v4_0_stop_dpg_mode(struct amdgpu_device *adev, int inst_idx)
 	/* disable dynamic power gating mode */
 	WREG32_P(SOC15_REG_OFFSET(VCN, inst_idx, regUVD_POWER_STATUS), 0,
 		~UVD_POWER_STATUS__UVD_PG_MODE_MASK);
-	return 0;
 }
 
 /**
@@ -1154,7 +1153,7 @@ static int vcn_v4_0_stop(struct amdgpu_device *adev)
 		fw_shared->sq.queue_mode |= FW_QUEUE_DPG_HOLD_OFF;
 
 		if (adev->pg_flags & AMD_PG_SUPPORT_VCN_DPG) {
-			r = vcn_v4_0_stop_dpg_mode(adev, i);
+			vcn_v4_0_stop_dpg_mode(adev, i);
 			continue;
 		}
 
-- 
2.37.1