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net/ice/base: check root pointer for validity

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ice_sched_get_tc_node uses pi->root without checking for NULL. Add a
check to prevent NULL pointer dereference.

Signed-off-by: Anirudh Venkataramanan <anirudh.venkataramanan@intel.com>
Signed-off-by: Paul M Stillwell Jr <paul.m.stillwell.jr@intel.com>
Signed-off-by: Qi Zhang <qi.z.zhang@intel.com>
Acked-by: Xiaolong Ye <xiaolong.ye@intel.com>
This commit is contained in:
Qi Zhang 2019-08-29 10:36:13 +08:00 committed by Ferruh Yigit
parent 348ea028ea
commit a823afa55f
1 changed files with 1 additions and 1 deletions
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drivers/net/ice/base/ice_sched.c
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@ -284,7 +284,7 @@ struct ice_sched_node *ice_sched_get_tc_node(struct ice_port_info *pi, u8 tc)
{ {
u8 i; u8 i;
if (!pi) if (!pi || !pi->root)
return NULL; return NULL;
for (i = 0; i < pi->root->num_children; i++) for (i = 0; i < pi->root->num_children; i++)
if (pi->root->children[i]->tc_num == tc) if (pi->root->children[i]->tc_num == tc)