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Commit 34a52920 authored by Taniya Das's avatar Taniya Das
Browse files

cpuidle: lpm-levels: Fix NULL pointer exception at lpm_get_latency 



In cases where client driver would call the API lpm_get_latency before the
lpm_root_node is initialized, would result in a NULL pointer exception. Fix
the same by moving the node check before.

CRs-Fixed: 973895
Change-Id: Ib2c7257bb7289f68d2bcb621ad311ceefe88a5f3
Signed-off-by: default avatarTaniya Das <tdas@codeaurora.org>
parent ac263d37

drivers/cpuidle/lpm-levels.c

+5 −5
Original line number Diff line number Diff line
@@ -239,6 +239,11 @@ int lpm_get_latency(struct latency_level *level, uint32_t *latency) 
	struct lpm_cluster *cluster;

	uint32_t val;



	if (!lpm_root_node) {

		pr_err("%s: lpm_probe not completed\n", __func__);

		return -EAGAIN;

	}



	if ((level->affinity_level < 0)

		|| (level->affinity_level > lpm_root_node->aff_level)

		|| (level->reset_level < LPM_RESET_LVL_RET)
@@ -246,11 +251,6 @@ int lpm_get_latency(struct latency_level *level, uint32_t *latency) 
		|| !latency)

		return -EINVAL;



	if (!lpm_root_node) {

		pr_err("%s: lpm_probe not completed\n", __func__);

		return -EAGAIN;

	}



	cluster = cluster_aff_match(lpm_root_node, level->affinity_level);

	if (!cluster) {

		pr_err("%s:No matching cluster found for affinity_level:%d\n",