Received-SPF: pass (google.com: best guess record for domain of linux-kernel-owner@vger.kernel.org designates 209.132.180.67 as permitted sender) client-ip=209.132.180.67;
From:   zhong jiang <zhongjiang@huawei.com>
To:     <airlied@linux.ie>, <daniel@ffwll.ch>
CC:     <Markus.Elfring@web.de>, <alexander.deucher@amd.com>,
        <christian.koenig@amd.com>, <David1.Zhou@amd.com>,
        <zhongjiang@huawei.com>, <linux-kernel@vger.kernel.org>
Subject: [PATCH v2] drm/amdgpu: Remove two redundant null pointer checks
Date:   Thu, 5 Sep 2019 13:49:12 +0800
Message-ID: <1567662552-3583-1-git-send-email-zhongjiang@huawei.com>
MIME-Version: 1.0
Content-Type: text/plain
Sender: linux-kernel-owner@vger.kernel.org
Precedence: bulk

The functions "debugfs_remove" and "kfree" tolerate the passing
of null pointers. Hence it is unnecessary to check such arguments
around the calls. Thus remove the extra condition check at two places.

Signed-off-by: zhong jiang <zhongjiang@huawei.com>
---
 drivers/gpu/drm/amd/amdgpu/amdgpu_debugfs.c | 6 ++----
 1 file changed, 2 insertions(+), 4 deletions(-)

diff --git a/drivers/gpu/drm/amd/amdgpu/amdgpu_debugfs.c b/drivers/gpu/drm/amd/amdgpu/amdgpu_debugfs.c
index 5652cc7..cb94627 100644
--- a/drivers/gpu/drm/amd/amdgpu/amdgpu_debugfs.c
+++ b/drivers/gpu/drm/amd/amdgpu/amdgpu_debugfs.c
@@ -1077,8 +1077,7 @@ static int amdgpu_debugfs_ib_preempt(void *data, u64 val)
 
 	ttm_bo_unlock_delayed_workqueue(&adev->mman.bdev, resched);
 
-	if (fences)
-		kfree(fences);
+	kfree(fences);
 
 	return 0;
 }
@@ -1103,8 +1102,7 @@ int amdgpu_debugfs_init(struct amdgpu_device *adev)
 
 void amdgpu_debugfs_preempt_cleanup(struct amdgpu_device *adev)
 {
-	if (adev->debugfs_preempt)
-		debugfs_remove(adev->debugfs_preempt);
+	debugfs_remove(adev->debugfs_preempt);
 }
 
 #else
-- 
1.7.12.4