[U-Boot] [PATCH fix for v2014.10 1/5] usb: kbd: Do not treat -ENODEV as an error for usb_kbd_deregister

[Hans de Goede]

ENODEV menas no usb keyboard was registered, threat this as a successful
usb_kbd_deregister.

Signed-off-by: Hans de Goede <hdegoede at redhat.com>
---
 common/usb_kbd.c | 7 ++++++-
 1 file changed, 6 insertions(+), 1 deletion(-)

diff --git a/common/usb_kbd.c b/common/usb_kbd.c
index 87f4125..4c17b0d 100644
--- a/common/usb_kbd.c
+++ b/common/usb_kbd.c
@@ -8,6 +8,7 @@
  * SPDX-License-Identifier:	GPL-2.0+
  */
 #include <common.h>
+#include <errno.h>
 #include <malloc.h>
 #include <stdio_dev.h>
 #include <asm/byteorder.h>
@@ -559,7 +560,11 @@ int drv_usb_kbd_init(void)
 int usb_kbd_deregister(void)
 {
 #ifdef CONFIG_SYS_STDIO_DEREGISTER
-	return stdio_deregister(DEVNAME);
+	int ret = stdio_deregister(DEVNAME);
+	if (ret && ret != -ENODEV)
+		return ret;
+
+	return 0;
 #else
 	return 1;
 #endif
-- 
2.1.0