RDMA/bnxt_re: Get rid of custom module reference counting

Instead of manually messing with parent driver module reference counting
rely on export symbol mechanism to ensure that proper probe/remove chain
is performed.

Link: https://lore.kernel.org/r/20210401065715.565226-4-leon@kernel.org
Signed-off-by: Leon Romanovsky <leonro@nvidia.com>
Acked-By: Devesh Sharma <devesh.sharma@broadcom.com>
Signed-off-by: Jason Gunthorpe <jgg@nvidia.com>

diff --git a/drivers/infiniband/hw/bnxt_re/main.c b/drivers/infiniband/hw/bnxt_re/main.c
index 140c54e..8bfbf02 100644 (file)
--- a/drivers/infiniband/hw/bnxt_re/main.c
+++ b/drivers/infiniband/hw/bnxt_re/main.c
@@ -601,13 +601,6 @@ static struct bnxt_re_dev *bnxt_re_from_netdev(struct net_device *netdev)
        return container_of(ibdev, struct bnxt_re_dev, ibdev);
 }
 
-static void bnxt_re_dev_unprobe(struct net_device *netdev,
-                               struct bnxt_en_dev *en_dev)
-{
-       dev_put(netdev);
-       module_put(en_dev->pdev->driver->driver.owner);
-}
-
 static struct bnxt_en_dev *bnxt_re_dev_probe(struct net_device *netdev)
 {
        struct bnxt_en_dev *en_dev;
@@ -628,10 +621,6 @@ static struct bnxt_en_dev *bnxt_re_dev_probe(struct net_device *netdev)
                return ERR_PTR(-ENODEV);
        }
 
-       /* Bump net device reference count */
-       if (!try_module_get(pdev->driver->driver.owner))
-               return ERR_PTR(-ENODEV);
-
        dev_hold(netdev);
 
        return en_dev;
@@ -1558,13 +1547,12 @@ fail:
 
 static void bnxt_re_dev_unreg(struct bnxt_re_dev *rdev)
 {
-       struct bnxt_en_dev *en_dev = rdev->en_dev;
        struct net_device *netdev = rdev->netdev;
 
        bnxt_re_dev_remove(rdev);
 
        if (netdev)
-               bnxt_re_dev_unprobe(netdev, en_dev);
+               dev_put(netdev);
 }
 
 static int bnxt_re_dev_reg(struct bnxt_re_dev **rdev, struct net_device *netdev)
@@ -1586,7 +1574,7 @@ static int bnxt_re_dev_reg(struct bnxt_re_dev **rdev, struct net_device *netdev)
        *rdev = bnxt_re_dev_add(netdev, en_dev);
        if (!*rdev) {
                rc = -ENOMEM;
-               bnxt_re_dev_unprobe(netdev, en_dev);
+               dev_put(netdev);
                goto exit;
        }
 exit: