[PATCH net-next v2 4/6] dpaa2-eth: retry the probe when the MAC is not yet discovered on the bus
From: Ioana Ciornei <hidden>
Date: 2021-01-08 09:08:24
Subsystem:
dpaa2 ethernet driver, networking drivers, the rest · Maintainers:
Ioana Ciornei, Andrew Lunn, "David S. Miller", Eric Dumazet, Jakub Kicinski, Paolo Abeni, Linus Torvalds
From: Ioana Ciornei <ioana.ciornei@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.ciornei@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