net: netcp: support probe deferral

The netcp driver shouldn't proceed until the knav qmss and dma
devices are ready. So return -EPROBE_DEFER if these devices are not
ready.

Signed-off-by: Murali Karicheri <m-karicheri2@ti.com>
Signed-off-by: David S. Miller <davem@davemloft.net>

diff --git a/drivers/net/ethernet/ti/netcp_core.c b/drivers/net/ethernet/ti/netcp_core.c
index 9c51b25..736f6f7 100644 (file)
--- a/drivers/net/ethernet/ti/netcp_core.c
+++ b/drivers/net/ethernet/ti/netcp_core.c
@@ -2158,6 +2158,10 @@ static int netcp_probe(struct platform_device *pdev)
        struct netcp_module *module;
        int ret;
 
+       if (!knav_dma_device_ready() ||
+           !knav_qmss_device_ready())
+               return -EPROBE_DEFER;
+
        if (!node) {
                dev_err(dev, "could not find device info\n");
                return -ENODEV;