[U-Boot] [PATCH] dm: usb: fix missing errno include regression

[Marcel Ziswiler]

From: Marcel Ziswiler <marcel.ziswiler at toradex.com>

If enabling CONFIG_DM_ETH currently compilation fails as follows:

drivers/usb/eth/usb_ether.c: In function 'usb_ether_register':
drivers/usb/eth/usb_ether.c:72:11: error: 'ENXIO' undeclared (first use
 in this function)
   return -ENXIO;
           ^
drivers/usb/eth/usb_ether.c:72:11: note: each undeclared identifier is
 reported only once for each function it appears in
drivers/usb/eth/usb_ether.c:78:11: error: 'ENOMEM' undeclared (first
 use in this function)
   return -ENOMEM;
           ^
drivers/usb/eth/usb_ether.c: In function 'usb_ether_receive':
drivers/usb/eth/usb_ether.c:102:11: error: 'EINVAL' undeclared (first
 use in this function)
   return -EINVAL;
           ^
drivers/usb/eth/usb_ether.c:114:11: error: 'ENOSPC' undeclared (first
 use in this function)
   return -ENOSPC;
           ^
drivers/usb/eth/usb_ether.c:119:27: error: 'EAGAIN' undeclared (first
 use in this function)
  return actual_len ? 0 : -EAGAIN;
                           ^
drivers/usb/eth/usb_ether.c:120:1: warning: control reaches end of
 non-void function [-Wreturn-type]
 }
 ^
scripts/Makefile.build:277: recipe for target
 'drivers/usb/eth/usb_ether.o' failed
make[2]: *** [drivers/usb/eth/usb_ether.o] Error 1

drivers/usb/eth/asix.c: In function 'asix_eth_recv':
drivers/usb/eth/asix.c:763:12: error: 'EAGAIN' undeclared (first use in
 this function)
    return -EAGAIN;
            ^
drivers/usb/eth/asix.c:763:12: note: each undeclared identifier is
 reported only once for each function it appears in
drivers/usb/eth/asix.c:799:10: error: 'EINVAL' undeclared (first use
 in this function)
  return -EINVAL;
          ^
  CC      drivers/usb/host/usb-uclass.o
drivers/usb/eth/asix.c: In function 'asix_write_hwaddr':
drivers/usb/eth/asix.c:819:11: error: 'ENOSYS' undeclared (first use
 in this function)
   return -ENOSYS;
           ^
drivers/usb/eth/asix.c: In function 'asix_eth_recv':
drivers/usb/eth/asix.c:800:1: warning: control reaches end of non-void
 function [-Wreturn-type]
 }
 ^
scripts/Makefile.build:277: recipe for target 'drivers/usb/eth/asix.o'
 failed
make[2]: *** [drivers/usb/eth/asix.o] Error 1

This is a regression of the following:

commit c8c2797c381054beaf3de89027af92a0b84b36cc
dm: usb: eth: Support driver model with USB Ethernet

and:

commit fbc4b8af469459425de72530dbded0ddbe157004
dm: usb: eth: Add driver-model support to the asix driver

Tested by enabling CONFIG_DM_ETH on Colibri T20/T30 as well as Apalis
T30 with CONFIG_USB_HOST_ETHER and CONFIG_USB_ETHER_ASIX enabled and a
LevelOne USB-0301 ASIX AX88772 dongle.

Signed-off-by: Marcel Ziswiler <marcel.ziswiler at toradex.com>
---
Note: While enabling CONFIG_DM_ETH now compiles it doesn't quite work
due to reception issues which I will report in a separate email.

 drivers/usb/eth/asix.c      | 1 +
 drivers/usb/eth/usb_ether.c | 1 +
 2 files changed, 2 insertions(+)

diff --git a/drivers/usb/eth/asix.c b/drivers/usb/eth/asix.c
index 72ec41e..ac14ee9 100644
--- a/drivers/usb/eth/asix.c
+++ b/drivers/usb/eth/asix.c
@@ -6,6 +6,7 @@
 
 #include <common.h>
 #include <dm.h>
+#include <errno.h>
 #include <usb.h>
 #include <malloc.h>
 #include <linux/mii.h>
diff --git a/drivers/usb/eth/usb_ether.c b/drivers/usb/eth/usb_ether.c
index 63785a9..3c3e082 100644
--- a/drivers/usb/eth/usb_ether.c
+++ b/drivers/usb/eth/usb_ether.c
@@ -6,6 +6,7 @@
 
 #include <common.h>
 #include <dm.h>
+#include <errno.h>
 #include <malloc.h>
 #include <usb.h>
 #include <dm/device-internal.h>
-- 
2.4.3