[PATCH net-next v2 4/6] dpaa2-eth: retry the probe when the MAC is not yet discovered on the bus

[Ioana Ciornei]

From: Ioana Ciornei <ioana.cior...@nxp.com>

The fsl_mc_get_endpoint() function now returns -EPROBE_DEFER when the
dpmac device was not yet discovered by the fsl-mc bus. When this
happens, pass the error code up so that we can retry the probe at a
later time.

Signed-off-by: Ioana Ciornei <ioana.cior...@nxp.com>
---
Changes in v2:
 - replaced IS_ERR_OR_NULL() by IS_ERR()

 drivers/net/ethernet/freescale/dpaa2/dpaa2-eth.c | 6 +++++-
 1 file changed, 5 insertions(+), 1 deletion(-)

diff --git a/drivers/net/ethernet/freescale/dpaa2/dpaa2-eth.c 
b/drivers/net/ethernet/freescale/dpaa2/dpaa2-eth.c
index f3f53e36aa00..a8c98869e484 100644
--- a/drivers/net/ethernet/freescale/dpaa2/dpaa2-eth.c
+++ b/drivers/net/ethernet/freescale/dpaa2/dpaa2-eth.c
@@ -4042,7 +4042,11 @@ static int dpaa2_eth_connect_mac(struct dpaa2_eth_priv 
*priv)
 
        dpni_dev = to_fsl_mc_device(priv->net_dev->dev.parent);
        dpmac_dev = fsl_mc_get_endpoint(dpni_dev);
-       if (IS_ERR_OR_NULL(dpmac_dev) || dpmac_dev->dev.type != 
&fsl_mc_bus_dpmac_type)
+
+       if (PTR_ERR(dpmac_dev) == -EPROBE_DEFER)
+               return PTR_ERR(dpmac_dev);
+
+       if (IS_ERR(dpmac_dev) || dpmac_dev->dev.type != &fsl_mc_bus_dpmac_type)
                return 0;
 
        mac = kzalloc(sizeof(struct dpaa2_mac), GFP_KERNEL);
-- 
2.29.2