linux-kernel - [PATCH v3 2/2] platform/x86: samsung-laptop: set debugfs blobs to read only

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Date:   Mon, 17 May 2021 12:07:45 +0200
From:   Wolfram Sang <wsa+renesas@...g-engineering.com>
To:     linux-kernel@...r.kernel.org
Cc:     Wolfram Sang <wsa+renesas@...g-engineering.com>,
        Andy Shevchenko <andy.shevchenko@...il.com>,
        Corentin Chary <corentin.chary@...il.com>,
        Hans de Goede <hdegoede@...hat.com>,
        Mark Gross <mgross@...ux.intel.com>,
        platform-driver-x86@...r.kernel.org
Subject: [PATCH v3 2/2] platform/x86: samsung-laptop: set debugfs blobs to read only

Those blobs can only be read. So, don't confuse users with 'writable'
flags. Also, remove S_IFREG because debugfs takes care of that.

Reviewed-by: Andy Shevchenko <andy.shevchenko@...il.com>
Signed-off-by: Wolfram Sang <wsa+renesas@...g-engineering.com>
---

change since v2: added Andy's tag and removed S_IFREG

 drivers/platform/x86/samsung-laptop.c | 8 ++++----
 1 file changed, 4 insertions(+), 4 deletions(-)

diff --git a/drivers/platform/x86/samsung-laptop.c b/drivers/platform/x86/samsung-laptop.c
index 763d97cbbe53..7ee010aa740a 100644
--- a/drivers/platform/x86/samsung-laptop.c
+++ b/drivers/platform/x86/samsung-laptop.c
@@ -1296,12 +1296,12 @@ static void samsung_debugfs_init(struct samsung_laptop *samsung)
 	debugfs_create_u32("d1", 0644, root, &samsung->debug.data.d1);
 	debugfs_create_u16("d2", 0644, root, &samsung->debug.data.d2);
 	debugfs_create_u8("d3", 0644, root, &samsung->debug.data.d3);
-	debugfs_create_blob("data", 0644, root, &samsung->debug.data_wrapper);
-	debugfs_create_blob("f0000_segment", 0600, root,
+	debugfs_create_blob("data", 0444, root, &samsung->debug.data_wrapper);
+	debugfs_create_blob("f0000_segment", 0400, root,
 			    &samsung->debug.f0000_wrapper);
-	debugfs_create_file("call", S_IFREG | 0444, root, samsung,
+	debugfs_create_file("call", 0444, root, samsung,
 			    &samsung_laptop_call_fops);
-	debugfs_create_blob("sdiag", 0644, root, &samsung->debug.sdiag_wrapper);
+	debugfs_create_blob("sdiag", 0444, root, &samsung->debug.sdiag_wrapper);
 }
 
 static void samsung_sabi_exit(struct samsung_laptop *samsung)
-- 
2.30.2