diff options
Diffstat (limited to 'arch/x86/kernel/cpu/intel_rdt_pseudo_lock.c')
-rw-r--r-- | arch/x86/kernel/cpu/intel_rdt_pseudo_lock.c | 10 |
1 files changed, 10 insertions, 0 deletions
diff --git a/arch/x86/kernel/cpu/intel_rdt_pseudo_lock.c b/arch/x86/kernel/cpu/intel_rdt_pseudo_lock.c index 912d53939f4f..a999a58ca331 100644 --- a/arch/x86/kernel/cpu/intel_rdt_pseudo_lock.c +++ b/arch/x86/kernel/cpu/intel_rdt_pseudo_lock.c @@ -1116,6 +1116,11 @@ static int pseudo_lock_measure_cycles(struct rdtgroup *rdtgrp, int sel) goto out; } + if (!plr->d) { + ret = -ENODEV; + goto out; + } + plr->thread_done = 0; cpu = cpumask_first(&plr->d->cpu_mask); if (!cpu_online(cpu)) { @@ -1429,6 +1434,11 @@ static int pseudo_lock_dev_mmap(struct file *filp, struct vm_area_struct *vma) plr = rdtgrp->plr; + if (!plr->d) { + mutex_unlock(&rdtgroup_mutex); + return -ENODEV; + } + /* * Task is required to run with affinity to the cpus associated * with the pseudo-locked region. If this is not the case the task |