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core_ctl: Add check for available cpus before accessing per_cpus

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For qultivate target its trying to call per_cpu() for
cpu's which are fused out and leading to crash So, Add
a check for available cpu's before calling per_cpu.

Change-Id: Idfd97fcfc83baa59afe9010396e7b6314087bf13
Signed-off-by: Avaneesh Kumar Dwivedi <quic_akdwived@quicinc.com>
Signed-off-by: Chetan C R <quic_cchinnad@quicinc.com>
This commit is contained in:
Avaneesh Kumar Dwivedi 2022-11-02 15:48:06 +05:30 committed by Chetan C R
parent 1de0be8d9c
commit 7bb7779ce4
1 changed files with 20 additions and 8 deletions
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28
kernel/sched/walt/core_ctl.c
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@ -340,7 +340,7 @@ static ssize_t store_not_preferred(struct cluster_data *state,
const char *buf, size_t count)
{
struct cpu_data *c;
unsigned int i;
unsigned int i, mask;
unsigned int val[MAX_CPUS_PER_CLUSTER];
unsigned long flags;
int ret;
@ -353,10 +353,16 @@ static ssize_t store_not_preferred(struct cluster_data *state,
return -EINVAL;
spin_lock_irqsave(&state_lock, flags);
for (i = 0; i < state->num_cpus; i++) {
c = &per_cpu(cpu_state, i + state->first_cpu);
for (i = 0, mask = 0; i < state->num_cpus;) {
if (!cpumask_test_cpu(i + mask + state->first_cpu, cpu_possible_mask)) {
mask++;
continue;
}
c = &per_cpu(cpu_state, i + mask + state->first_cpu);
c->not_preferred = val[i];
not_preferred_count += !!val[i];
i++;
}
state->nr_not_preferred_cpus = not_preferred_count;
spin_unlock_irqrestore(&state_lock, flags);
@ -369,20 +375,26 @@ static ssize_t show_not_preferred(const struct cluster_data *state, char *buf)
struct cpu_data *c;
ssize_t count = 0;
unsigned long flags;
int i;
int i, mask;
spin_lock_irqsave(&state_lock, flags);
for (i = 0; i < state->num_cpus; i++) {
c = &per_cpu(cpu_state, i + state->first_cpu);
for (i = 0, mask = 0; i < state->num_cpus;) {
if (!cpumask_test_cpu(i + mask + state->first_cpu, cpu_possible_mask)) {
mask++;
continue;
}
c = &per_cpu(cpu_state, i + mask + state->first_cpu);
count += scnprintf(buf + count, PAGE_SIZE - count,
"CPU#%d: %u\n", c->cpu, c->not_preferred);
"CPU#%d: %u\n", c->cpu, c->not_preferred);
i++;
}
spin_unlock_irqrestore(&state_lock, flags);
return count;
}
struct core_ctl_attr {
struct attribute attr;
ssize_t (*show)(const struct cluster_data *, char *);