[PATCH 23/26] usb: gadget: udc: s3c2410: replace usage of rc to check if a list element was found

[Jakob Koschel]

To move the list iterator variable into the list_for_each_entry_*()
macro in the future it should be avoided to use the list iterator
variable after the loop body.

To *never* use the list iterator variable after the loop it was
concluded to use a separate iterator variable [1].

This removes the need to check the rc value to determine if the
break/goto was hit and can be made more obvious
by checking if the variable was set within the list traversal loop.

Link: https://lore.kernel.org/all/YhdfEIwI4EdtHdym@xxxxxxxxx/
Signed-off-by: Jakob Koschel <jakobkoschel@xxxxxxxxx>
---
 drivers/usb/gadget/composite.c | 9 +++++----
 1 file changed, 5 insertions(+), 4 deletions(-)

diff --git a/drivers/usb/gadget/composite.c b/drivers/usb/gadget/composite.c
index 26908d012ac8..fa9f4aedf52d 100644
--- a/drivers/usb/gadget/composite.c
+++ b/drivers/usb/gadget/composite.c
@@ -863,14 +863,14 @@ static int set_config(struct usb_composite_dev *cdev,
 		const struct usb_ctrlrequest *ctrl, unsigned number)
 {
 	struct usb_gadget	*gadget = cdev->gadget;
-	struct usb_configuration *c = NULL;
+	struct usb_configuration *c = NULL, *iter;
 	int			result = -EINVAL;
 	unsigned		power = gadget_is_otg(gadget) ? 8 : 100;
 	int			tmp;
 
 	if (number) {
-		list_for_each_entry(c, &cdev->configs, list) {
-			if (c->bConfigurationValue == number) {
+		list_for_each_entry(iter, &cdev->configs, list) {
+			if (iter->bConfigurationValue == number) {
 				/*
 				 * We disable the FDs of the previous
 				 * configuration only if the new configuration
@@ -878,11 +878,12 @@ static int set_config(struct usb_composite_dev *cdev,
 				 */
 				if (cdev->config)
 					reset_config(cdev);
+				c = iter;
 				result = 0;
 				break;
 			}
 		}
-		if (result < 0)
+		if (!c)
 			goto done;
 	} else { /* Zero configuration value - need to reset the config */
 		if (cdev->config)
-- 
2.25.1