linux-kernel - [PATCH] drm/amd/amdkfd: Drop unnecessary NULL check after container

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Message-Id: <20210521150212.2076151-1-linux@roeck-us.net>
Date:   Fri, 21 May 2021 08:02:12 -0700
From:   Guenter Roeck <linux@...ck-us.net>
To:     Felix Kuehling <Felix.Kuehling@....com>
Cc:     Alex Deucher <alexander.deucher@....com>,
        Christian König <christian.koenig@....com>,
        David Airlie <airlied@...ux.ie>,
        Daniel Vetter <daniel@...ll.ch>, amd-gfx@...ts.freedesktop.org,
        dri-devel@...ts.freedesktop.org, linux-kernel@...r.kernel.org,
        Guenter Roeck <linux@...ck-us.net>
Subject: [PATCH] drm/amd/amdkfd: Drop unnecessary NULL check after container_of

The first parameter passed to container_of() is the pointer to the work
structure passed to the worker and never NULL. The NULL check on the
result of container_of() is therefore unnecessary and misleading.
Remove it.

This change was made automatically with the following Coccinelle script.

@@
type t;
identifier v;
statement s;
@@

<+...
(
  t v = container_of(...);
|
  v = container_of(...);
)
  ...
  when != v
- if (\( !v \| v == NULL \) ) s
...+>

Signed-off-by: Guenter Roeck <linux@...ck-us.net>
---
 drivers/gpu/drm/amd/amdkfd/kfd_process.c | 2 --
 1 file changed, 2 deletions(-)

diff --git a/drivers/gpu/drm/amd/amdkfd/kfd_process.c b/drivers/gpu/drm/amd/amdkfd/kfd_process.c
index 5b6c5669c03d..2f8d352e0069 100644
--- a/drivers/gpu/drm/amd/amdkfd/kfd_process.c
+++ b/drivers/gpu/drm/amd/amdkfd/kfd_process.c
@@ -110,8 +110,6 @@ static void kfd_sdma_activity_worker(struct work_struct *work)
 
 	workarea = container_of(work, struct kfd_sdma_activity_handler_workarea,
 				sdma_activity_work);
-	if (!workarea)
-		return;
 
 	pdd = workarea->pdd;
 	if (!pdd)
-- 
2.25.1