greybus: manifest: rework cport parsing

Rework the the code that parses the manifest for CPorts associated
with a bundle so it only touches each manifest descriptor once.
(Previously the list was scanned from the beginning repeatedly
until all bundle CPorts were found.)  Shorten the name of the
descriptor variable, to avoid line wrap.
Signed-off-by: Alex Elder <elder@linaro.org>
Signed-off-by: Greg Kroah-Hartman <gregkh@google.com>

drivers/staging/greybus/manifest.c

@@ -201,27 +201,23 @@ static char *gb_string_get(struct gb_interface *intf, u8 string_id)
 static u32 gb_manifest_parse_cports(struct gb_bundle *bundle)
 {
 	struct gb_interface *intf = bundle->intf;
+	struct manifest_desc *desc;
+	struct manifest_desc *next;
+	u8 bundle_id = bundle->id;
 	u32 count = 0;
 
-	while (true) {
-		struct manifest_desc *descriptor;
+	/* Set up all cport descriptors associated with this bundle */
+	list_for_each_entry_safe(desc, next, &intf->manifest_descs, links) {
 		struct greybus_descriptor_cport *desc_cport;
 		u8 protocol_id;
 		u16 cport_id;
-		bool found = false;
 
-		/* Find a cport descriptor */
-		list_for_each_entry(descriptor, &intf->manifest_descs, links) {
-			if (descriptor->type == GREYBUS_TYPE_CPORT) {
-				desc_cport = descriptor->data;
-				if (desc_cport->bundle == bundle->id) {
-					found = true;
-					break;
-				}
-			}
-		}
-		if (!found)
-			break;
+		if (desc->type != GREYBUS_TYPE_CPORT)
+			continue;
+
+		desc_cport = desc->data;
+		if (desc_cport->bundle != bundle_id)
+			continue;
 
 		/* Found one.  Set up its function structure */
 		protocol_id = desc_cport->protocol_id;
@@ -230,8 +226,9 @@ static u32 gb_manifest_parse_cports(struct gb_bundle *bundle)
 			return 0;	/* Error */
 
 		count++;
+
 		/* Release the cport descriptor */
-		release_manifest_descriptor(descriptor);
+		release_manifest_descriptor(desc);
 	}
 
 	return count;