[PATCH] drm/etnaviv: fix some off by one bugs

Dan Carpenter
2018-07-13T15:00:18Z

The ->nr_signal is the supposed to be the number of elements in the
->signal array. There was one place where it was 5 but it was supposed
to be 4. That looks like a copy and paste bug. There were also two
checks that were off by one.

Fixes: 9e2c2e273012 ("drm/etnaviv: add infrastructure to query perf counter")
Signed-off-by: Dan Carpenter <dan.carpenter@oracle.com>
---
Not tested.

diff --git a/drivers/gpu/drm/etnaviv/etnaviv_perfmon.c b/drivers/gpu/drm/etnaviv/etnaviv_perfmon.c
index 9980d81a26e3..4227a4006c34 100644
--- a/drivers/gpu/drm/etnaviv/etnaviv_perfmon.c
+++ b/drivers/gpu/drm/etnaviv/etnaviv_perfmon.c
@@ -113,7 +113,7 @@ static const struct etnaviv_pm_domain doms_3d[] = {
.name = "PE",
.profile_read = VIVS_MC_PROFILE_PE_READ,
.profile_config = VIVS_MC_PROFILE_CONFIG0,
- .nr_signals = 5,
+ .nr_signals = 4,
.signal = (const struct etnaviv_pm_signal[]) {
{
"PIXEL_COUNT_KILLED_BY_COLOR_PIPE",
@@ -435,7 +435,7 @@ int etnaviv_pm_query_sig(struct etnaviv_gpu *gpu,

dom = meta->domains + signal->domain;

- if (signal->iter > dom->nr_signals)
+ if (signal->iter >= dom->nr_signals)
return -EINVAL;

sig = &dom->signal[signal->iter];
@@ -461,7 +461,7 @@ int etnaviv_pm_req_validate(const struct drm_etnaviv_gem_submit_pmr *r,

dom = meta->domains + r->domain;

- if (r->signal > dom->nr_signals)
+ if (r->signal >= dom->nr_signals)
return -EINVAL;

return 0;