1 files changed, 22 insertions, 4 deletions

diff --git a/net/core/dev.c b/net/core/dev.c
index 7a774ebf64e2..fe2e387eed29 100644
--- a/net/core/dev.c
+++ b/net/core/dev.c
@@ -143,6 +143,7 @@
 #include <linux/net_namespace.h>
 #include <linux/indirect_call_wrapper.h>
 #include <net/devlink.h>
+#include <linux/pm_runtime.h>
 
 #include "net-sysfs.h"
 
@@ -1492,8 +1493,13 @@ static int __dev_open(struct net_device *dev, struct netlink_ext_ack *extack)
 
 	ASSERT_RTNL();
 
-	if (!netif_device_present(dev))
-		return -ENODEV;
+	if (!netif_device_present(dev)) {
+		/* may be detached because parent is runtime-suspended */
+		if (dev->dev.parent)
+			pm_runtime_resume(dev->dev.parent);
+		if (!netif_device_present(dev))
+			return -ENODEV;
+	}
 
 	/* Block netpoll from trying to do any rx path servicing.
 	 * If we don't do this there is a chance ndo_poll_controller
@@ -5442,6 +5448,8 @@ static int generic_xdp_install(struct net_device *dev, struct netdev_bpf *xdp)
 		for (i = 0; i < new->aux->used_map_cnt; i++) {
 			if (dev_map_can_have_prog(new->aux->used_maps[i]))
 				return -EINVAL;
+			if (cpu_map_prog_allowed(new->aux->used_maps[i]))
+				return -EINVAL;
 		}
 	}
 
@@ -5585,7 +5593,7 @@ void netif_receive_skb_list(struct list_head *head)
 }
 EXPORT_SYMBOL(netif_receive_skb_list);
 
-DEFINE_PER_CPU(struct work_struct, flush_works);
+static DEFINE_PER_CPU(struct work_struct, flush_works);
 
 /* Network device is going away, flush any packets still pending */
 static void flush_backlog(struct work_struct *work)
@@ -6685,7 +6693,9 @@ static int napi_poll(struct napi_struct *n, struct list_head *repoll)
 		trace_napi_poll(n, work, weight);
 	}
 
-	WARN_ON_ONCE(work > weight);
+	if (unlikely(work > weight))
+		pr_err_once("NAPI poll function %pS returned %d, exceeding its budget of %d.\n",
+			    n->poll, work, weight);
 
 	if (likely(work < weight))
 		goto out_unlock;
@@ -7900,6 +7910,7 @@ EXPORT_SYMBOL(netdev_bonding_info_change);
 
 /**
  * netdev_get_xmit_slave - Get the xmit slave of master device
+ * @dev: device
  * @skb: The packet
  * @all_slaves: assume all the slaves are active
  *
@@ -8866,6 +8877,13 @@ int dev_change_xdp_fd(struct net_device *dev, struct netlink_ext_ack *extack,
 			return -EINVAL;
 		}
 
+		if (prog->expected_attach_type == BPF_XDP_CPUMAP) {
+			NL_SET_ERR_MSG(extack,
+				       "BPF_XDP_CPUMAP programs can not be attached to a device");
+			bpf_prog_put(prog);
+			return -EINVAL;
+		}
+
 		/* prog->aux->id may be 0 for orphaned device-bound progs */
 		if (prog->aux->id && prog->aux->id == prog_id) {
 			bpf_prog_put(prog);