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perf_event_open: Propagate return value

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Refs: #1236
Change-Id: I61a4683a533fb199a73a99bc7b2e6f2638212000
This commit is contained in:
Masamichi Takagi
2018-11-26 19:13:15 +09:00
parent 2b1b82b242
commit 1954aec0ea
1 changed files with 26 additions and 13 deletions
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39
kernel/syscall.c
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@ -3763,7 +3763,7 @@ SYSCALL_DECLARE(signalfd4)
int
perf_counter_alloc(struct thread *thread)
{
int ret = -1;
int ret = -EINVAL;
int i = 0;
// find avail generic counter
@ -4148,20 +4148,23 @@ static int vm_policy_insert(struct process_vm *vm, struct vm_range_numa_policy *
}
#ifdef ENABLE_PERF
struct mc_perf_event*
mc_perf_event_alloc(struct perf_event_attr *attr)
static int mc_perf_event_alloc(struct mc_perf_event **out,
struct perf_event_attr *attr)
{
int ret = 0;
unsigned long val = 0, extra_config = 0;
struct mc_perf_event *event;
struct mc_perf_event *event = NULL;
int ereg_id;
if (!attr) {
return NULL;
ret = -EINVAL;
goto out;
}
event = kmalloc(sizeof(struct mc_perf_event), IHK_MC_AP_NOWAIT);
if (!event) {
return NULL;
ret = -ENOMEM;
goto out;
}
memset(event, 0, sizeof(struct mc_perf_event));
@ -4189,11 +4192,13 @@ mc_perf_event_alloc(struct perf_event_attr *attr)
default:
// Unexpected type
return NULL;
ret = -EINVAL;
goto out;
}
if (val == 0) {
return NULL;
ret = -EINVAL;
goto out;
}
event->hw_config = val;
@ -4205,11 +4210,19 @@ mc_perf_event_alloc(struct perf_event_attr *attr)
event->extra_reg.reg = ihk_mc_get_extra_reg_msr(ereg_id);
event->extra_reg.idx = ihk_mc_get_extra_reg_idx(ereg_id);
}
return event;
*out = event;
out:
if (ret) {
kfree(event);
}
return ret;
}
SYSCALL_DECLARE(perf_event_open)
{
int ret;
struct syscall_request request IHK_DMA_ALIGN;
struct thread *thread = cpu_local_var(current);
struct process *proc = thread->proc;
@ -4260,16 +4273,16 @@ SYSCALL_DECLARE(perf_event_open)
return -ENOENT;
}
event = mc_perf_event_alloc((struct perf_event_attr*)attr);
if (!event) {
return -1;
ret = mc_perf_event_alloc(&event, (struct perf_event_attr *)attr);
if (ret) {
return ret;
}
event->pid = pid;
counter_idx = perf_counter_alloc(thread);
if (counter_idx < 0) {
return -1;
return counter_idx;
}
event->counter_id = counter_idx;