RDMA/erdma: Defer probing if netdevice can not be found

[ Upstream commit 6bd1bca858f1734a75572a788213d1e1143f2f0a ]

ERDMA device may be probed before its associated netdevice, returning
-EPROBE_DEFER allows OS try to probe erdma device later.

Fixes: d55e6fb4803c ("RDMA/erdma: Add the erdma module")
Signed-off-by: Cheng Xu <chengyou@linux.alibaba.com>
Link: https://lore.kernel.org/r/20230320084652.16807-5-chengyou@linux.alibaba.com
Signed-off-by: Leon Romanovsky <leon@kernel.org>
Signed-off-by: Sasha Levin <sashal@kernel.org>

diff --git a/drivers/infiniband/hw/erdma/erdma_main.c b/drivers/infiniband/hw/erdma/erdma_main.c
index 5dc31e5df5cba78ca1025120186fbe891e4551c3..4a29a53a6652eacde0bf5619a3b63850cf9faf2a 100644 (file)
--- a/drivers/infiniband/hw/erdma/erdma_main.c
+++ b/drivers/infiniband/hw/erdma/erdma_main.c
@@ -56,7 +56,7 @@ done:
 static int erdma_enum_and_get_netdev(struct erdma_dev *dev)
 {
        struct net_device *netdev;
-       int ret = -ENODEV;
+       int ret = -EPROBE_DEFER;
 
        /* Already binded to a net_device, so we skip. */
        if (dev->netdev)