linux-kernel - [PATCH -next] HSI: omap_ssi_port: fix debugfs_simple

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Date:   Fri, 28 Dec 2018 07:33:35 +0000
From:   YueHaibing <yuehaibing@...wei.com>
To:     Sebastian Reichel <sre@...nel.org>,
        Greg Kroah-Hartman <gregkh@...uxfoundation.org>,
        Yangtao Li <tiny.windzz@...il.com>,
        "Randy Dunlap" <rdunlap@...radead.org>
CC:     YueHaibing <yuehaibing@...wei.com>, <linux-kernel@...r.kernel.org>,
        <kernel-janitors@...r.kernel.org>
Subject: [PATCH -next] HSI: omap_ssi_port: fix debugfs_simple_attr.cocci warnings

Use DEFINE_DEBUGFS_ATTRIBUTE rather than DEFINE_SIMPLE_ATTRIBUTE
for debugfs files.

Semantic patch information:
Rationale: DEFINE_SIMPLE_ATTRIBUTE + debugfs_create_file()
imposes some significant overhead as compared to
DEFINE_DEBUGFS_ATTRIBUTE + debugfs_create_file_unsafe().

Generated by: scripts/coccinelle/api/debugfs/debugfs_simple_attr.cocci

Signed-off-by: YueHaibing <yuehaibing@...wei.com>
---
 drivers/hsi/controllers/omap_ssi_port.c | 6 +++---
 1 file changed, 3 insertions(+), 3 deletions(-)

diff --git a/drivers/hsi/controllers/omap_ssi_port.c b/drivers/hsi/controllers/omap_ssi_port.c
index b2b3989c..afbf134 100644
--- a/drivers/hsi/controllers/omap_ssi_port.c
+++ b/drivers/hsi/controllers/omap_ssi_port.c
@@ -162,7 +162,7 @@ static int ssi_div_set(void *data, u64 val)
 	return 0;
 }
 
-DEFINE_SIMPLE_ATTRIBUTE(ssi_sst_div_fops, ssi_div_get, ssi_div_set, "%llu\n");
+DEFINE_DEBUGFS_ATTRIBUTE(ssi_sst_div_fops, ssi_div_get, ssi_div_set, "%llu\n");
 
 static int ssi_debug_add_port(struct omap_ssi_port *omap_port,
 				     struct dentry *dir)
@@ -177,8 +177,8 @@ static int ssi_debug_add_port(struct omap_ssi_port *omap_port,
 	dir = debugfs_create_dir("sst", dir);
 	if (!dir)
 		return -ENOMEM;
-	debugfs_create_file("divisor", S_IRUGO | S_IWUSR, dir, port,
-			    &ssi_sst_div_fops);
+	debugfs_create_file_unsafe("divisor", 0644, dir, port,
+				   &ssi_sst_div_fops);
 
 	return 0;
 }