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[NET_SCHED]: HTB: fix incorrect use of RB_EMPTY_NODE 

Fix incorrect use of RB_EMPTY_NODE in htb_safe_rb_erase, which makes it
skip nodes within the rbtree instead of nodes not in the tree, resulting
in crashes later on.

The root cause for this seems to be the very counter-intuitive behaviour
of the RB_EMPTY_NODE macro, which returns _false_ when the node is empty.

Signed-off-by: Patrick McHardy <kaber@trash.net>
Signed-off-by: David S. Miller <davem@davemloft.net>
hifive-unleashed-5.1
Patrick McHardy 2006-09-27 16:36:23 -07:00 committed by David S. Miller
parent 321efff7c3
commit 787e0617e5
1 changed files with 1 additions and 1 deletions
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2
net/sched/sch_htb.c
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@ -391,7 +391,7 @@ static inline void htb_add_class_to_row(struct htb_sched *q,
/* If this triggers, it is a bug in this code, but it need not be fatal */
static void htb_safe_rb_erase(struct rb_node *rb, struct rb_root *root)
{
if (RB_EMPTY_NODE(rb)) {
if (!RB_EMPTY_NODE(rb)) {
WARN_ON(1);
} else {
rb_erase(rb, root);