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soc: qcom: hyp_core_ctl: Catch uninitialized freq QOS object

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Currently, the code is not checking if the freq qos object was
requested before using it in the undo reservation path.
This causes warnings like "freq_qos_update_request() called for
unknown object".
Fix this by checking freq_qos_init_done flag is set prior to using the
qos objects.

Change-Id: Ie8009f5ea191f4ad0c199a3fce04376871a5d2c5
Signed-off-by: Sai Harshini Nimmala <snimmala@codeaurora.org>
This commit is contained in:
Sai Harshini Nimmala 2020-08-14 17:52:02 -07:00
commit 0f69c57d70
1 changed files with 30 additions and 22 deletions
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52
drivers/soc/qcom/hyp_core_ctl.c
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@ -81,6 +81,7 @@ static struct hyp_core_ctl_cpu_map hh_cpumap[NR_CPUS];
static bool is_vcpu_info_populated;
static bool init_done;
static int nr_vcpus;
static bool freq_qos_init_done;
static inline void hyp_core_ctl_print_status(char *msg)
{
@ -111,12 +112,14 @@ static void hyp_core_ctl_undo_reservation(struct hyp_core_ctl_data *hcd)
cpumask_clear_cpu(cpu, &hcd->our_isolated_cpus);
qos_req = &per_cpu(qos_min_req, cpu);
ret = freq_qos_update_request(qos_req,
FREQ_QOS_MIN_DEFAULT_VALUE);
if (ret < 0)
pr_err("fail to update min freq for CPU%d ret=%d\n",
if (freq_qos_init_done) {
qos_req = &per_cpu(qos_min_req, cpu);
ret = freq_qos_update_request(qos_req,
FREQ_QOS_MIN_DEFAULT_VALUE);
if (ret < 0)
pr_err("fail to update min freq for CPU%d ret=%d\n",
cpu, ret);
}
}
hyp_core_ctl_print_status("undo_reservation_end");
@ -279,9 +282,9 @@ static void hyp_core_ctl_do_reservation(struct hyp_core_ctl_data *hcd)
cpumask_set_cpu(i, &hcd->our_isolated_cpus);
qos_req = &per_cpu(qos_min_req, i);
min_freq = per_cpu(qos_min_freq, i);
if (min_freq) {
if (min_freq && freq_qos_init_done) {
qos_req = &per_cpu(qos_min_req, i);
ret = freq_qos_update_request(qos_req, min_freq);
if (ret < 0)
pr_err("fail to update min freq for CPU%d ret=%d\n",
@ -339,9 +342,9 @@ static void hyp_core_ctl_do_reservation(struct hyp_core_ctl_data *hcd)
cpumask_set_cpu(i, &hcd->our_isolated_cpus);
qos_req = &per_cpu(qos_min_req, i);
min_freq = per_cpu(qos_min_freq, i);
if (min_freq) {
if (min_freq && freq_qos_init_done) {
qos_req = &per_cpu(qos_min_req, i);
ret = freq_qos_update_request(qos_req,
min_freq);
if (ret < 0)
@ -386,12 +389,14 @@ static void hyp_core_ctl_do_reservation(struct hyp_core_ctl_data *hcd)
cpumask_clear_cpu(i, &hcd->our_isolated_cpus);
qos_req = &per_cpu(qos_min_req, i);
ret = freq_qos_update_request(qos_req,
if (freq_qos_init_done) {
qos_req = &per_cpu(qos_min_req, i);
ret = freq_qos_update_request(qos_req,
FREQ_QOS_MIN_DEFAULT_VALUE);
if (ret < 0)
pr_err("fail to update min freq for CPU%d ret=%d\n",
if (ret < 0)
pr_err("fail to update min freq for CPU%d ret=%d\n",
i, ret);
}
if (--unisolate_need == 0)
break;
@ -532,12 +537,14 @@ static int hyp_core_ctl_cpu_cooling_cb(struct notifier_block *nb,
if (cpumask_test_cpu(cpu, &the_hcd->our_isolated_cpus)) {
sched_unisolate_cpu(cpu);
cpumask_clear_cpu(cpu, &the_hcd->our_isolated_cpus);
qos_req = &per_cpu(qos_min_req, cpu);
ret = freq_qos_update_request(qos_req,
if (freq_qos_init_done) {
qos_req = &per_cpu(qos_min_req, cpu);
ret = freq_qos_update_request(qos_req,
FREQ_QOS_MIN_DEFAULT_VALUE);
if (ret < 0)
pr_err("fail to update min freq for CPU%d ret=%d\n",
if (ret < 0)
pr_err("fail to update min freq for CPU%d ret=%d\n",
cpu, ret);
}
}
} else {
/*
@ -597,12 +604,14 @@ static int hyp_core_ctl_hp_offline(unsigned int cpu)
*/
if (cpumask_test_and_clear_cpu(cpu, &the_hcd->our_isolated_cpus)) {
sched_unisolate_cpu_unlocked(cpu);
qos_req = &per_cpu(qos_min_req, cpu);
ret = freq_qos_update_request(qos_req,
if (freq_qos_init_done) {
qos_req = &per_cpu(qos_min_req, cpu);
ret = freq_qos_update_request(qos_req,
FREQ_QOS_MIN_DEFAULT_VALUE);
if (ret < 0)
pr_err("fail to update min freq for CPU%d ret=%d\n",
if (ret < 0)
pr_err("fail to update min freq for CPU%d ret=%d\n",
cpu, ret);
}
}
return 0;
@ -799,7 +808,6 @@ static ssize_t status_show(struct device *dev, struct device_attribute *attr,
static DEVICE_ATTR_RO(status);
static bool freq_qos_init_done;
static int init_freq_qos_req(void)
{
int cpu, ret;