I ran into the same problems. I hacked up a patch to 3.8.8 from this patch:
http://permalink.gmane.org/gmane.linux.network/267097
and the ifdown/ifup issue went away for me.
Here is my git diff for those who want to give it a try:
diff --git a/drivers/net/ethernet/ti/cpsw.c b/drivers/net/ethernet/ti/cpsw.c
index 21ba53e..67c7f74 100644
--- a/drivers/net/ethernet/ti/cpsw.c
+++ b/drivers/net/ethernet/ti/cpsw.c
@@ -342,6 +342,7 @@ struct cpsw_priv {
/* snapshot of IRQ numbers */
u32 irqs_table[4];
u32 num_irqs;
+ bool irq_enabled;
struct cpts cpts;
};
@@ -458,7 +459,10 @@ static irqreturn_t cpsw_interrupt(int irq, void
*dev_id)
if (likely(netif_running(priv->ndev))) {
cpsw_intr_disable(priv);
- cpsw_disable_irq(priv);
+ if (priv->irq_enabled == true) {
+ cpsw_disable_irq(priv);
+ priv->irq_enabled = false;
+ }
napi_schedule(&priv->napi);
}
@@ -512,7 +516,11 @@ static int cpsw_poll(struct napi_struct *napi, int
budget)
if ((num_total_rx + num_total_tx) < budget) {
napi_complete(napi);
cpsw_intr_enable(priv);
- cpsw_enable_irq(priv);
+ if (priv->irq_enabled == false) {
+ cpsw_enable_irq(priv);
+ priv->irq_enabled = true;
+ }
+
}
return num_total_rx + num_total_rx;
@@ -812,7 +820,10 @@ static int cpsw_ndo_stop(struct net_device *ndev)
struct cpsw_priv *priv = netdev_priv(ndev);
cpsw_info(priv, ifdown, "shutting down cpsw device\n");
- cpsw_disable_irq(priv);
+ if (priv->irq_enabled == true) {
+ cpsw_disable_irq(priv);
+ priv->irq_enabled = false;
+ }
netif_stop_queue(priv->ndev);
if (!priv->data.disable_napi)
napi_disable(&priv->napi);
@@ -1307,6 +1318,8 @@ static int cpsw_probe(struct platform_device *pdev)
priv->msg_enable = netif_msg_init(debug_level, CPSW_DEBUG);
priv->rx_packet_max = max(rx_packet_max, 128);
+ priv->irq_enabled = false;
+
/*
* This may be required here for child devices.
*/
--
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