netdev - [PATCH rdma-next 5/8] IB/IPoIB: Skip device which doesn't have InfiniBand port

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Date:   Mon,  5 Apr 2021 08:49:57 +0300
From:   Leon Romanovsky <leon@...nel.org>
To:     Doug Ledford <dledford@...hat.com>,
        Jason Gunthorpe <jgg@...dia.com>
Cc:     Parav Pandit <parav@...dia.com>,
        "David S. Miller" <davem@...emloft.net>,
        Dennis Dalessandro <dennis.dalessandro@...nelisnetworks.com>,
        Jakub Kicinski <kuba@...nel.org>,
        Karsten Graul <kgraul@...ux.ibm.com>,
        linux-kernel@...r.kernel.org, linux-rdma@...r.kernel.org,
        linux-s390@...r.kernel.org,
        Mike Marciniszyn <mike.marciniszyn@...nelisnetworks.com>,
        netdev@...r.kernel.org, rds-devel@....oracle.com,
        Santosh Shilimkar <santosh.shilimkar@...cle.com>
Subject: [PATCH rdma-next 5/8] IB/IPoIB: Skip device which doesn't have InfiniBand port

From: Parav Pandit <parav@...dia.com>

Skip RDMA device which doesn't have InfiniBand ports using newly
introduced client_supported() callback.

Signed-off-by: Parav Pandit <parav@...dia.com>
Signed-off-by: Leon Romanovsky <leonro@...dia.com>
---
 drivers/infiniband/ulp/ipoib/ipoib_main.c | 13 +++++++++++++
 1 file changed, 13 insertions(+)

diff --git a/drivers/infiniband/ulp/ipoib/ipoib_main.c b/drivers/infiniband/ulp/ipoib/ipoib_main.c
index 8f769ebaacc6..b02c10dea242 100644
--- a/drivers/infiniband/ulp/ipoib/ipoib_main.c
+++ b/drivers/infiniband/ulp/ipoib/ipoib_main.c
@@ -93,6 +93,7 @@ static struct net_device *ipoib_get_net_dev_by_params(
 		struct ib_device *dev, u32 port, u16 pkey,
 		const union ib_gid *gid, const struct sockaddr *addr,
 		void *client_data);
+static bool ipoib_client_supported(struct ib_device *device);
 static int ipoib_set_mac(struct net_device *dev, void *addr);
 static int ipoib_ioctl(struct net_device *dev, struct ifreq *ifr,
 		       int cmd);
@@ -102,6 +103,7 @@ static struct ib_client ipoib_client = {
 	.add    = ipoib_add_one,
 	.remove = ipoib_remove_one,
 	.get_net_dev_by_params = ipoib_get_net_dev_by_params,
+	.is_supported = ipoib_client_supported,
 };
 
 #ifdef CONFIG_INFINIBAND_IPOIB_DEBUG
@@ -2530,6 +2532,17 @@ static struct net_device *ipoib_add_port(const char *format,
 	return ERR_PTR(-ENOMEM);
 }
 
+static bool ipoib_client_supported(struct ib_device *device)
+{
+	u32 i;
+
+	rdma_for_each_port(device, i) {
+		if (rdma_protocol_ib(device, i))
+			return true;
+	}
+	return false;
+}
+
 static int ipoib_add_one(struct ib_device *device)
 {
 	struct list_head *dev_list;
-- 
2.30.2