On Mon, Apr 13, 2015 at 11:23:26PM +0300, Sergei Shtylyov wrote:

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This is a bit hacky.  Can't your driver make sure that the HW is ready?

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   Will look into this. Perhaps it's a remainder from when the PTP driver was
separate...

   No, we enter this mode upon closing the Ethernet device and when
the ring DMA sizes are changed. Seems unavoidable...

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+    if (ravb_read(priv->ndev, CSR) & CSR_OPS_CONFIG)
+        return true;
+    else
+        return false;

It is surely avoidable.  The driver knows (or should know) whether or
not the hardware has been configured or not.

Thanks,
Richard