linux-kernel - [PATCH 1/2] drm: msm: adreno: use DEFINE_DEBUGFS_ATTRIBUTE with debugfs_create_file

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Date:   Fri, 30 Oct 2020 00:32:41 +0530
From:   Deepak R Varma <mh12gx2825@...il.com>
To:     Rob Clark <robdclark@...il.com>, Sean Paul <sean@...rly.run>,
        David Airlie <airlied@...ux.ie>,
        Daniel Vetter <daniel@...ll.ch>, linux-arm-msm@...r.kernel.org,
        dri-devel@...ts.freedesktop.org, freedreno@...ts.freedesktop.org,
        linux-kernel@...r.kernel.org, outreachy-kernel@...glegroups.com
Cc:     mh12gx2825@...il.com
Subject: [PATCH 1/2] drm: msm: adreno: use DEFINE_DEBUGFS_ATTRIBUTE with
 debugfs_create_file_unsafe()

Using DEFINE_DEBUGFS_ATTRIBUTE macro with debugfs_create_file_unsafe()
function in place of the debugfs_create_file() function will make the
file operation struct "reset" aware of the file's lifetime. Additional
details here: https://lists.archive.carbon60.com/linux/kernel/2369498

Issue reported by Coccinelle script:
scripts/coccinelle/api/debugfs/debugfs_simple_attr.cocci

Signed-off-by: Deepak R Varma <mh12gx2825@...il.com>
---
Please Note: This is project task specific patch.

 drivers/gpu/drm/msm/adreno/a5xx_debugfs.c | 6 +++---
 1 file changed, 3 insertions(+), 3 deletions(-)

diff --git a/drivers/gpu/drm/msm/adreno/a5xx_debugfs.c b/drivers/gpu/drm/msm/adreno/a5xx_debugfs.c
index fc2c905b6c9e..ffe1fb9be155 100644
--- a/drivers/gpu/drm/msm/adreno/a5xx_debugfs.c
+++ b/drivers/gpu/drm/msm/adreno/a5xx_debugfs.c
@@ -138,7 +138,7 @@ reset_set(void *data, u64 val)
 	return 0;
 }
 
-DEFINE_SIMPLE_ATTRIBUTE(reset_fops, NULL, reset_set, "%llx\n");
+DEFINE_DEBUGFS_ATTRIBUTE(reset_fops, NULL, reset_set, "%llx\n");
 
 
 void a5xx_debugfs_init(struct msm_gpu *gpu, struct drm_minor *minor)
@@ -154,6 +154,6 @@ void a5xx_debugfs_init(struct msm_gpu *gpu, struct drm_minor *minor)
 				 ARRAY_SIZE(a5xx_debugfs_list),
 				 minor->debugfs_root, minor);
 
-	debugfs_create_file("reset", S_IWUGO, minor->debugfs_root, dev,
-			    &reset_fops);
+	debugfs_create_file_unsafe("reset", S_IWUGO, minor->debugfs_root, dev,
+				&reset_fops);
 }
-- 
2.25.1