From: Ivan Vecera <ivecera@redhat.com>
Date: Fri, 15 Feb 2019 10:23:25 +0000 (+0100)
Subject: net: sched: sch_api: set an error msg when qdisc_alloc_handle() fails
X-Git-Url: http://git.lede-project.org./?a=commitdiff_plain;h=aaeb1dea514a47e25b4dc05deb54fc4dc538d1d5;p=openwrt%2Fstaging%2Fblogic.git

net: sched: sch_api: set an error msg when qdisc_alloc_handle() fails

This patch sets an error message in extack when the number of qdisc
handles exceeds the maximum. Also the error-code ENOSPC is more
appropriate than ENOMEM in this situation.

Signed-off-by: Ivan Vecera <ivecera@redhat.com>
Reported-by: Li Shuang <shuali@redhat.com>
Reviewed-by: Stefano Brivio <sbrivio@redhat.com>
Signed-off-by: David S. Miller <davem@davemloft.net>
---

diff --git a/net/sched/sch_api.c b/net/sched/sch_api.c
index 2283924fb56d..b8a388e4bcc4 100644
--- a/net/sched/sch_api.c
+++ b/net/sched/sch_api.c
@@ -1201,9 +1201,11 @@ static struct Qdisc *qdisc_create(struct net_device *dev,
 	} else {
 		if (handle == 0) {
 			handle = qdisc_alloc_handle(dev);
-			err = -ENOMEM;
-			if (handle == 0)
+			if (handle == 0) {
+				NL_SET_ERR_MSG(extack, "Maximum number of qdisc handles was exceeded");
+				err = -ENOSPC;
 				goto err_out3;
+			}
 		}
 		if (!netif_is_multiqueue(dev))
 			sch->flags |= TCQ_F_ONETXQUEUE;