usb: phytium_v2: fix uninitialized ret in gadget_start

Log:
2025-05-16T12:01:20.8409093Z drivers/usb/phytium_usb_v2/gadget.c:1563:6: error: variable 'ret' is used uninitialized whenever 'if' condition is true [-Werror,-Wsometimes-uninitialized]
2025-05-16T12:01:20.8411014Z  1563 |         if (!pdev->setup_buf)
2025-05-16T12:01:20.8411857Z       |             ^~~~~~~~~~~~~~~~
2025-05-16T12:01:20.8412989Z drivers/usb/phytium_usb_v2/gadget.c:1600:9: note: uninitialized use occurs here
2025-05-16T12:01:20.8414076Z  1600 |         return ret;
2025-05-16T12:01:20.8414775Z       |                ^~~
2025-05-16T12:01:20.8415931Z drivers/usb/phytium_usb_v2/gadget.c:1563:2: note: remove the 'if' if its condition is always false
2025-05-16T12:01:20.8417705Z  1563 |         if (!pdev->setup_buf)
2025-05-16T12:01:20.8418583Z       |         ^~~~~~~~~~~~~~~~~~~~~
2025-05-16T12:01:20.8419358Z  1564 |                 goto free_pdev;
2025-05-16T12:01:20.8420170Z       |                 ~~~~~~~~~~~~~~
2025-05-16T12:01:20.8421430Z drivers/usb/phytium_usb_v2/gadget.c:1525:9: note: initialize the variable 'ret' to silence this warning
2025-05-16T12:01:20.8422666Z  1525 |         int ret;
2025-05-16T12:01:20.8423346Z       |                ^
2025-05-16T12:01:20.8424036Z       |                 = 0
Signed-off-by: Wentao Guan <guanwentao@uniontech.com>

Author: opsiff

drivers/usb/phytium_usb_v2/gadget.c

@@ -1522,7 +1522,7 @@ static int gadget_start(void *data)
 	struct phytium_device *pdev;
 	struct phytium_usb *phytium_usb = (struct phytium_usb *)data;
 	u32 max_speed;
-	int ret;
+	int ret = -ENOMEM;
 
 	if (!phytium_usb)
 		return 0;