[PATCH -next] phy: realtek: usb: Drop unnecessary error check for debugfs_create_dir

[Ruan Jinjie]

This patch removes the error checking for debugfs_create_dir in
phy-rtk-usb2.c and phy-rtk-usb3.c. This is because the debugfs_create_dir()
does not return NULL but an ERR_PTR after an error.

The DebugFS kernel API is developed in a way that the caller can safely
ignore the errors that occur during the creation of DebugFS nodes.
The debugfs APIs have a IS_ERR() judge in start_creating() which can
handle it gracefully. so these checks are unnecessary.

Signed-off-by: Ruan Jinjie <ruanjinjie at huawei.com>
---
 drivers/phy/realtek/phy-rtk-usb2.c | 2 --
 drivers/phy/realtek/phy-rtk-usb3.c | 2 --
 2 files changed, 4 deletions(-)

diff --git a/drivers/phy/realtek/phy-rtk-usb2.c b/drivers/phy/realtek/phy-rtk-usb2.c
index ed47a1ce5d9c..715cd9480347 100644
--- a/drivers/phy/realtek/phy-rtk-usb2.c
+++ b/drivers/phy/realtek/phy-rtk-usb2.c
@@ -853,8 +853,6 @@ static inline void create_debug_files(struct rtk_phy *rtk_phy)
 
 	rtk_phy->debug_dir = debugfs_create_dir(dev_name(rtk_phy->dev),
 						phy_debug_root);
-	if (!rtk_phy->debug_dir)
-		return;
 
 	if (!debugfs_create_file("parameter", 0444, rtk_phy->debug_dir, rtk_phy,
 				 &rtk_usb2_parameter_fops))
diff --git a/drivers/phy/realtek/phy-rtk-usb3.c b/drivers/phy/realtek/phy-rtk-usb3.c
index 6050f1ef4f6b..6d726926607a 100644
--- a/drivers/phy/realtek/phy-rtk-usb3.c
+++ b/drivers/phy/realtek/phy-rtk-usb3.c
@@ -416,8 +416,6 @@ static inline void create_debug_files(struct rtk_phy *rtk_phy)
 		return;
 
 	rtk_phy->debug_dir = debugfs_create_dir(dev_name(rtk_phy->dev), phy_debug_root);
-	if (!rtk_phy->debug_dir)
-		return;
 
 	if (!debugfs_create_file("parameter", 0444, rtk_phy->debug_dir, rtk_phy,
 				 &rtk_usb3_parameter_fops))
-- 
2.34.1