From: Jason Gunthorpe <jgg@mellanox.com>
Date: Wed, 6 May 2020 10:46:52 +0300
Subject: RDMA/addr: Mark addr_resolve as might_sleep()
Patch-mainline: v5.8-rc1
Git-commit: f8f2a576cb0c574044c049210ea4096e5cb1d7fc
References: jsc#SLE-15176

Under one path through ib_nl_fetch_ha() this calls nlmsg_new(GFP_KERNEL)
which is a sleeping call. This is a very rare path, so mark fetch_ha() and
the module external entry point that conditionally calls through to
fetch_ha() as might_sleep().

Link: https://lore.kernel.org/r/20200506074701.9775-2-leon@kernel.org
Signed-off-by: Leon Romanovsky <leonro@mellanox.com>
Signed-off-by: Jason Gunthorpe <jgg@mellanox.com>
Acked-by: Thomas Bogendoerfer <tbogendoerfer@suse.de>
---
 drivers/infiniband/core/addr.c |    4 ++++
 1 file changed, 4 insertions(+)

--- a/drivers/infiniband/core/addr.c
+++ b/drivers/infiniband/core/addr.c
@@ -371,6 +371,8 @@ static int fetch_ha(const struct dst_ent
 		(const void *)&dst_in6->sin6_addr;
 	sa_family_t family = dst_in->sa_family;
 
+	might_sleep();
+
 	/* If we have a gateway in IB mode then it must be an IB network */
 	if (has_gateway(dst, family) && dev_addr->network == RDMA_NETWORK_IB)
 		return ib_nl_fetch_ha(dev_addr, daddr, seq, family);
@@ -727,6 +729,8 @@ int roce_resolve_route_from_path(struct
 	struct rdma_dev_addr dev_addr = {};
 	int ret;
 
+	might_sleep();
+
 	if (rec->roce.route_resolved)
 		return 0;