net: expose eth_is_active() function to test network device state
The previous eth_device struct returned by eth_get_dev() allowed
code to directly query the state member field. However, with
CONFIG_DM_ETH this data gets encapsulated (i.e. private), and
eth_get_dev() returns a udevice struct 'abstraction' instead.
This breaks legacy code relying on the former behaviour - e.g.
netconsole.
(see http://lists.denx.de/pipermail/u-boot/2015-June/216528.html)
The patch introduces a method to retrieve the ethernet device
state in a 'clean' and uniform way, supporting both legacy code
and driver model. The new function eth_is_active() accepts a
device struct pointer and tests it for ETH_STATE_ACTIVE.
Signed-off-by: Bernhard Nortmann <bernhard.nortmann@web.de>
Reviewed-by: Simon Glass <sjg@chromium.org>
Acked-by: Joe Hershberger <joe.hershberger@ni.com>
diff --git a/include/net.h b/include/net.h
index f1671e3..3a787cc 100644
--- a/include/net.h
+++ b/include/net.h
@@ -149,7 +149,9 @@
*/
struct udevice *eth_get_dev_by_name(const char *devname);
unsigned char *eth_get_ethaddr(void); /* get the current device MAC */
+
/* Used only when NetConsole is enabled */
+int eth_is_active(struct udevice *dev); /* Test device for active state */
int eth_init_state_only(void); /* Set active state */
void eth_halt_state_only(void); /* Set passive state */
#endif
@@ -195,6 +197,8 @@
return NULL;
}
+/* Used only when NetConsole is enabled */
+int eth_is_active(struct eth_device *dev); /* Test device for active state */
/* Set active state */
static inline __attribute__((always_inline)) int eth_init_state_only(void)
{
diff --git a/net/eth.c b/net/eth.c
index 26520d3..2e24b55 100644
--- a/net/eth.c
+++ b/net/eth.c
@@ -389,6 +389,17 @@
priv->state = ETH_STATE_PASSIVE;
}
+int eth_is_active(struct udevice *dev)
+{
+ struct eth_device_priv *priv;
+
+ if (!dev || !device_active(dev))
+ return 0;
+
+ priv = dev_get_uclass_priv(dev);
+ return priv->state == ETH_STATE_ACTIVE;
+}
+
int eth_send(void *packet, int length)
{
struct udevice *current;
@@ -580,7 +591,7 @@
.per_device_auto_alloc_size = sizeof(struct eth_device_priv),
.flags = DM_UC_FLAG_SEQ_ALIAS,
};
-#endif
+#endif /* #ifdef CONFIG_DM_ETH */
#ifndef CONFIG_DM_ETH
@@ -918,6 +929,11 @@
eth_current->state = ETH_STATE_PASSIVE;
}
+int eth_is_active(struct eth_device *dev)
+{
+ return dev && dev->state == ETH_STATE_ACTIVE;
+}
+
int eth_send(void *packet, int length)
{
if (!eth_current)