[PATCH AUTOSEL 5.4 3/7] platform/chrome: cros_ec_debugfs: Fix permissions for panicinfo

[Sasha Levin <sashal@kernel.org>]

From: Avadhut Naik <Avadhut.Naik@amd.com>

[ Upstream commit 0706526ec7704dcd046239078ac175d11a88a95e ]

The debugfs_create_blob() function has been used to create read-only binary
blobs in debugfs. The function filters out permissions, other than S_IRUSR,
S_IRGRP and S_IROTH, provided while creating the blobs.

The very behavior though is being changed through previous patch in the
series (fs: debugfs: Add write functionality to debugfs blobs) which makes
the binary blobs writable by owners. Thus, all permissions provided while
creating the blobs, except S_IRUSR,S_IWUSR, S_IRGRP, S_IROTH, will be
filtered by debugfs_create_blob().

As such, rectify the permissions of panicinfo file since the S_IFREG flag
was anyways being filtered out by debugfs_create_blob(). Moreover, the
very flag will always be set be set for the panicinfo file through
__debugfs_create_file().

Signed-off-by: Avadhut Naik <Avadhut.Naik@amd.com>
Reviewed-by: Greg Kroah-Hartman <gregkh@linuxfoundation.org>
Reviewed-by: Tony Luck <tony.luck@intel.com>
Signed-off-by: Rafael J. Wysocki <rafael.j.wysocki@intel.com>
Signed-off-by: Sasha Levin <sashal@kernel.org>
---
 drivers/platform/chrome/cros_ec_debugfs.c | 2 +-
 1 file changed, 1 insertion(+), 1 deletion(-)

diff --git a/drivers/platform/chrome/cros_ec_debugfs.c b/drivers/platform/chrome/cros_ec_debugfs.c
index c4b57e1df192..b45235b0d777 100644
--- a/drivers/platform/chrome/cros_ec_debugfs.c
+++ b/drivers/platform/chrome/cros_ec_debugfs.c
@@ -409,7 +409,7 @@ static int cros_ec_create_panicinfo(struct cros_ec_debugfs *debug_info)
 	debug_info->panicinfo_blob.data = msg->data;
 	debug_info->panicinfo_blob.size = ret;
 
-	debugfs_create_blob("panicinfo", S_IFREG | 0444, debug_info->dir,
+	debugfs_create_blob("panicinfo", 0444, debug_info->dir,
 			    &debug_info->panicinfo_blob);
 
 	return 0;
-- 
2.43.0