diff --git a/drivers/infiniband/core/cache.c b/drivers/infiniband/core/cache.c
index ae04826..0718b21 100644
--- a/drivers/infiniband/core/cache.c
+++ b/drivers/infiniband/core/cache.c
@@ -510,8 +510,7 @@ int ib_find_cached_gid_by_port(struct ib_device *ib_dev,
 	struct ib_gid_attr val = {.ndev = ndev, .gid_type = gid_type};
 	unsigned long flags;
 
-	if (port < rdma_start_port(ib_dev) ||
-	    port > rdma_end_port(ib_dev))
+	if (!rdma_is_port_valid(ib_dev, port))
 		return -ENOENT;
 
 	table = ports_table[port - rdma_start_port(ib_dev)];
@@ -571,8 +570,7 @@ static int ib_cache_gid_find_by_filter(struct ib_device *ib_dev,
 	if (!ports_table)
 		return -EOPNOTSUPP;
 
-	if (port < rdma_start_port(ib_dev) ||
-	    port > rdma_end_port(ib_dev) ||
+	if (!rdma_is_port_valid(ib_dev, port) ||
 	    !rdma_protocol_roce(ib_dev, port))
 		return -EPROTONOSUPPORT;
 
@@ -863,7 +861,7 @@ int ib_get_cached_gid(struct ib_device *device,
 	struct ib_gid_table **ports_table = device->cache.gid_cache;
 	struct ib_gid_table *table = ports_table[port_num - rdma_start_port(device)];
 
-	if (port_num < rdma_start_port(device) || port_num > rdma_end_port(device))
+	if (!rdma_is_port_valid(device, port_num))
 		return -EINVAL;
 
 	read_lock_irqsave(&table->rwlock, flags);
@@ -912,7 +910,7 @@ int ib_get_cached_pkey(struct ib_device *device,
 	unsigned long flags;
 	int ret = 0;
 
-	if (port_num < rdma_start_port(device) || port_num > rdma_end_port(device))
+	if (!rdma_is_port_valid(device, port_num))
 		return -EINVAL;
 
 	read_lock_irqsave(&device->cache.lock, flags);
@@ -941,7 +939,7 @@ int ib_find_cached_pkey(struct ib_device *device,
 	int ret = -ENOENT;
 	int partial_ix = -1;
 
-	if (port_num < rdma_start_port(device) || port_num > rdma_end_port(device))
+	if (!rdma_is_port_valid(device, port_num))
 		return -EINVAL;
 
 	read_lock_irqsave(&device->cache.lock, flags);
@@ -981,7 +979,7 @@ int ib_find_exact_cached_pkey(struct ib_device *device,
 	int i;
 	int ret = -ENOENT;
 
-	if (port_num < rdma_start_port(device) || port_num > rdma_end_port(device))
+	if (!rdma_is_port_valid(device, port_num))
 		return -EINVAL;
 
 	read_lock_irqsave(&device->cache.lock, flags);
@@ -1010,7 +1008,7 @@ int ib_get_cached_lmc(struct ib_device *device,
 	unsigned long flags;
 	int ret = 0;
 
-	if (port_num < rdma_start_port(device) || port_num > rdma_end_port(device))
+	if (!rdma_is_port_valid(device, port_num))
 		return -EINVAL;
 
 	read_lock_irqsave(&device->cache.lock, flags);
@@ -1037,7 +1035,7 @@ static void ib_cache_update(struct ib_device *device,
 	bool			   use_roce_gid_table =
 					rdma_cap_roce_gid_table(device, port);
 
-	if (port < rdma_start_port(device) || port > rdma_end_port(device))
+	if (!rdma_is_port_valid(device, port))
 		return;
 
 	table = ports_table[port - rdma_start_port(device)];
diff --git a/drivers/infiniband/core/cma.c b/drivers/infiniband/core/cma.c
index e7dcfac..69f37b1 100644
--- a/drivers/infiniband/core/cma.c
+++ b/drivers/infiniband/core/cma.c
@@ -269,8 +269,7 @@ struct cma_device *cma_enum_devices_by_ibdev(cma_device_filter	filter,
 int cma_get_default_gid_type(struct cma_device *cma_dev,
 			     unsigned int port)
 {
-	if (port < rdma_start_port(cma_dev->device) ||
-	    port > rdma_end_port(cma_dev->device))
+	if (!rdma_is_port_valid(cma_dev->device, port))
 		return -EINVAL;
 
 	return cma_dev->default_gid_type[port - rdma_start_port(cma_dev->device)];
@@ -282,8 +281,7 @@ int cma_set_default_gid_type(struct cma_device *cma_dev,
 {
 	unsigned long supported_gids;
 
-	if (port < rdma_start_port(cma_dev->device) ||
-	    port > rdma_end_port(cma_dev->device))
+	if (!rdma_is_port_valid(cma_dev->device, port))
 		return -EINVAL;
 
 	supported_gids = roce_gid_type_mask_support(cma_dev->device, port);
diff --git a/drivers/infiniband/core/device.c b/drivers/infiniband/core/device.c
index 571974c..f2e4865 100644
--- a/drivers/infiniband/core/device.c
+++ b/drivers/infiniband/core/device.c
@@ -659,7 +659,7 @@ int ib_query_port(struct ib_device *device,
 	union ib_gid gid;
 	int err;
 
-	if (port_num < rdma_start_port(device) || port_num > rdma_end_port(device))
+	if (!rdma_is_port_valid(device, port_num))
 		return -EINVAL;
 
 	memset(port_attr, 0, sizeof(*port_attr));
@@ -825,7 +825,7 @@ int ib_modify_port(struct ib_device *device,
 	if (!device->modify_port)
 		return -ENOSYS;
 
-	if (port_num < rdma_start_port(device) || port_num > rdma_end_port(device))
+	if (!rdma_is_port_valid(device, port_num))
 		return -EINVAL;
 
 	return device->modify_port(device, port_num, port_modify_mask,
diff --git a/drivers/infiniband/core/verbs.c b/drivers/infiniband/core/verbs.c
index 71580cc..9b77fbc 100644
--- a/drivers/infiniband/core/verbs.c
+++ b/drivers/infiniband/core/verbs.c
@@ -1205,8 +1205,7 @@ int ib_resolve_eth_dmac(struct ib_device *device,
 {
 	int           ret = 0;
 
-	if (ah_attr->port_num < rdma_start_port(device) ||
-	    ah_attr->port_num > rdma_end_port(device))
+	if (!rdma_is_port_valid(device, ah_attr->port_num))
 		return -EINVAL;
 
 	if (!rdma_cap_eth_ah(device, ah_attr->port_num))
diff --git a/include/rdma/ib_verbs.h b/include/rdma/ib_verbs.h
index 958a24d..81c68e9 100644
--- a/include/rdma/ib_verbs.h
+++ b/include/rdma/ib_verbs.h
@@ -2275,6 +2275,13 @@ static inline u8 rdma_end_port(const struct ib_device *device)
 	return rdma_cap_ib_switch(device) ? 0 : device->phys_port_cnt;
 }
 
+static inline int rdma_is_port_valid(const struct ib_device *device,
+				     unsigned int port)
+{
+	return (port >= rdma_start_port(device) &&
+		port <= rdma_end_port(device));
+}
+
 static inline bool rdma_protocol_ib(const struct ib_device *device, u8 port_num)
 {
 	return device->port_immutable[port_num].core_cap_flags & RDMA_CORE_CAP_PROT_IB;
