Blackfin arch: add missing gpio error handling to make sure we roll back requests in case one fails

Signed-off-by: Michael Hennerich <michael.hennerich@analog.com>
Signed-off-by: Bryan Wu <bryan.wu@analog.com>

arch/blackfin/kernel/bfin_gpio.c

@@ -711,10 +711,16 @@ int peripheral_request_list(unsigned short per[], const char *label)
 	int ret;
 
 	for (cnt = 0; per[cnt] != 0; cnt++) {
+
 		ret = peripheral_request(per[cnt], label);
-		if (ret < 0)
+
+		if (ret < 0) {
+			for ( ; cnt > 0; cnt--) {
+				peripheral_free(per[cnt - 1]);
+			}
 		return ret;
 		}
+	}
 
 	return 0;
 }

arch/blackfin/mach-bf548/gpio.c

@@ -212,10 +212,17 @@ int peripheral_request_list(unsigned short per[], const char *label)
 	int ret;
 
 	for (cnt = 0; per[cnt] != 0; cnt++) {
+
 		ret = peripheral_request(per[cnt], label);
-		if (ret < 0)
+
+		if (ret < 0) {
+			for ( ; cnt > 0; cnt--) {
+				peripheral_free(per[cnt - 1]);
+			}
 		return ret;
 		}
+	}
+
 
 	return 0;
 }