diff options
Diffstat (limited to 'drivers/misc/tegra-profiler/main.c')
| -rw-r--r-- | drivers/misc/tegra-profiler/main.c | 17 |
1 files changed, 10 insertions, 7 deletions
diff --git a/drivers/misc/tegra-profiler/main.c b/drivers/misc/tegra-profiler/main.c index f0116af49035..0f1237fe57f4 100644 --- a/drivers/misc/tegra-profiler/main.c +++ b/drivers/misc/tegra-profiler/main.c @@ -85,6 +85,8 @@ static int start(void) return -EBUSY; } + preempt_disable(); + if (!atomic_cmpxchg(&ctx.started, 0, 1)) { if (ctx.pmu) { err = ctx.pmu->enable(); @@ -117,16 +119,21 @@ static int start(void) } } + preempt_enable(); return 0; errout: atomic_set(&ctx.started, 0); tegra_profiler_unlock(); + preempt_enable(); + return err; } static void stop(void) { + preempt_disable(); + if (atomic_cmpxchg(&ctx.started, 1, 0)) { quadd_hrt_stop(); @@ -143,6 +150,8 @@ static void stop(void) tegra_profiler_unlock(); } + + preempt_enable(); } static inline int is_event_supported(struct source_info *si, int event) @@ -180,13 +189,7 @@ set_parameters(struct quadd_parameters *p, uid_t *debug_app_uid) return -EINVAL; } - ctx.param.freq = p->freq; - ctx.param.ma_freq = p->ma_freq; - ctx.param.backtrace = p->backtrace; - ctx.param.use_freq = p->use_freq; - ctx.param.system_wide = p->system_wide; - ctx.param.power_rate_freq = p->power_rate_freq; - ctx.param.debug_samples = p->debug_samples; + ctx.param = *p; for (i = 0; i < ARRAY_SIZE(p->reserved); i++) ctx.param.reserved[i] = p->reserved[i]; |