linux-kernel - [PATCH] drm/amd/display: Delete a redundant memory setting in amdgpu_dm_irq_register

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Date:   Mon, 17 Jun 2019 14:10:10 +0200
From:   Markus Elfring <Markus.Elfring@....de>
To:     dri-devel@...ts.freedesktop.org, amd-gfx@...ts.freedesktop.org,
        Alex Deucher <alexander.deucher@....com>,
        Christian König <christian.koenig@....com>,
        Daniel Vetter <daniel@...ll.ch>,
        David Airlie <airlied@...ux.ie>,
        David Francis <David.Francis@....com>,
        "David (ChunMing) Zhou" <David1.Zhou@....com>,
        Harry Wentland <harry.wentland@....com>,
        Leo Li <sunpeng.li@....com>,
        Mario Kleiner <mario.kleiner.de@...il.com>,
        Sam Ravnborg <sam@...nborg.org>
Cc:     kernel-janitors@...r.kernel.org,
        LKML <linux-kernel@...r.kernel.org>
Subject: [PATCH] drm/amd/display: Delete a redundant memory setting in
 amdgpu_dm_irq_register_interrupt()

From: Markus Elfring <elfring@...rs.sourceforge.net>
Date: Mon, 17 Jun 2019 13:56:39 +0200

The memory was set to zero already by a call of the function “kzalloc”.
Thus remove an extra call of the function “memset” for this purpose.

This issue was detected by using the Coccinelle software.

Signed-off-by: Markus Elfring <elfring@...rs.sourceforge.net>
---
 drivers/gpu/drm/amd/display/amdgpu_dm/amdgpu_dm_irq.c | 2 --
 1 file changed, 2 deletions(-)

diff --git a/drivers/gpu/drm/amd/display/amdgpu_dm/amdgpu_dm_irq.c b/drivers/gpu/drm/amd/display/amdgpu_dm/amdgpu_dm_irq.c
index 1b59d3d42f7b..fa5d503d379c 100644
--- a/drivers/gpu/drm/amd/display/amdgpu_dm/amdgpu_dm_irq.c
+++ b/drivers/gpu/drm/amd/display/amdgpu_dm/amdgpu_dm_irq.c
@@ -277,8 +277,6 @@ void *amdgpu_dm_irq_register_interrupt(struct amdgpu_device *adev,
 		return DAL_INVALID_IRQ_HANDLER_IDX;
 	}

-	memset(handler_data, 0, sizeof(*handler_data));
-
 	init_handler_common_data(handler_data, ih, handler_args, &adev->dm);

 	irq_source = int_params->irq_source;
--
2.22.0