FAILED: patch "[PATCH] IB/cma: Fix RDMA port validation for iWarp" failed to apply to 4.4-stable tree

The patch below does not apply to the 4.4-stable tree.
If someone wants it applied there, or to any other stable or longterm tree, then please email the backport, including the original git commit id to <[email protected]>.

thanks,

greg k-h

------------------ original commit in Linus's tree ------------------

From: Matan Barak <[email protected]>
Date: Thu, 7 Jan 2016 11:19:29 +0200
Subject: [PATCH] IB/cma: Fix RDMA port validation for iWarp

cma_validate_port wrongly assumed that Ethernet devices are RoCE devices and thus their ndev should be matched in the GID table. This broke the iWarp support. Fixing that matching the ndev only if we work on a RoCE port.

and netdevice')

index 559ee3d27b4a..a811594b0b59 100644
@@ -551,7 +551,7 @@ static inline int cma_validate_port(struct ib_device *device, u8 port,
 	if ((dev_type != ARPHRD_INFINIBAND) && rdma_protocol_ib(device, port))
 		return ret;
 
-	if (dev_type == ARPHRD_ETHER) {
+	if (dev_type == ARPHRD_ETHER && rdma_protocol_roce(device, port)) {
 		ndev = dev_get_by_index(&init_net, bound_if_index);
 		if (ndev && ndev->flags & IFF_LOOPBACK) {
 			pr_info("detected loopback device\n");

Hey Greg, I just posted the backport. Not sure if I did the comment correctly...

Thanks,

Steve.

It was wonderful, thanks.

greg k-h