net: Change return codes from net/eth.c to use errorno constants

Many functions returned -1 previously. Change them to return appropriate error
codes.

Signed-off-by: Joe Hershberger <joe.hershberger@ni.com>
Reported-by: Simon Glass <sjg@chromium.org>
Reviewed-by: Simon Glass <sjg@chromium.org>

diff --git a/net/eth.c b/net/eth.c
index 84919e0a76202392d1e070de3bd6dec11b0b8333..9ad15cd8a33cfa196bd45ca11e7976e09612742e 100644 (file)
--- a/net/eth.c
+++ b/net/eth.c
@@ -227,7 +227,7 @@ int eth_unregister(struct eth_device *dev)
 
        /* No device */
        if (!eth_devices)
-               return -1;
+               return -ENODEV;
 
        for (cur = eth_devices; cur->next != eth_devices && cur->next != dev;
             cur = cur->next)
@@ -235,7 +235,7 @@ int eth_unregister(struct eth_device *dev)
 
        /* Device not found */
        if (cur->next != dev)
-               return -1;
+               return -ENODEV;
 
        cur->next = dev->next;
 
@@ -368,7 +368,7 @@ int eth_init(bd_t *bis)
 
        if (!eth_current) {
                puts("No ethernet found.\n");
-               return -1;
+               return -ENODEV;
        }
 
        /* Sync environment with network devices */
@@ -397,7 +397,7 @@ int eth_init(bd_t *bis)
                eth_try_another(0);
        } while (old_current != eth_current);
 
-       return -1;
+       return -ETIMEDOUT;
 }
 
 void eth_halt(void)
@@ -413,7 +413,7 @@ void eth_halt(void)
 int eth_send(void *packet, int length)
 {
        if (!eth_current)
-               return -1;
+               return -ENODEV;
 
        return eth_current->send(eth_current, packet, length);
 }
@@ -421,7 +421,7 @@ int eth_send(void *packet, int length)
 int eth_rx(void)
 {
        if (!eth_current)
-               return -1;
+               return -ENODEV;
 
        return eth_current->recv(eth_current);
 }