[PATCH 2/7] drm/i915: get runtime PM at i915_reg_read_ioctl

Paulo Zanoni
2014-04-01T17:55:35Z

From: Paulo Zanoni <paulo.r.zanoni@intel.com>

To avoid WARNs when we call it.

Testcase: igt/pm_pc8/reg-read-ioctl
Bugzilla: https://bugs.freedesktop.org/show_bug.cgi?id=75693
Signed-off-by: Paulo Zanoni <paulo.r.zanoni@intel.com>
---
drivers/gpu/drm/i915/intel_uncore.c | 11 ++++++++---
1 file changed, 8 insertions(+), 3 deletions(-)

diff --git a/drivers/gpu/drm/i915/intel_uncore.c b/drivers/gpu/drm/i915/intel_uncore.c
index c47853b..f729dc7 100644
--- a/drivers/gpu/drm/i915/intel_uncore.c
+++ b/drivers/gpu/drm/i915/intel_uncore.c
@@ -866,7 +866,7 @@ int i915_reg_read_ioctl(struct drm_device *dev,
struct drm_i915_private *dev_priv = dev->dev_private;
struct drm_i915_reg_read *reg = data;
struct register_whitelist const *entry = whitelist;
- int i;
+ int i, ret = 0;

for (i = 0; i < ARRAY_SIZE(whitelist); i++, entry++) {
if (entry->offset == reg->offset &&
@@ -877,6 +877,8 @@ int i915_reg_read_ioctl(struct drm_device *dev,
if (i == ARRAY_SIZE(whitelist))
return -EINVAL;

+ intel_runtime_pm_get(dev_priv);
+
switch (entry->size) {
case 8:
reg->val = I915_READ64(reg->offset);
@@ -892,10 +894,13 @@ int i915_reg_read_ioctl(struct drm_device *dev,
break;
default:
WARN_ON(1);
- return -EINVAL;
+ ret = -EINVAL;
+ goto out;
}

- return 0;
+out:
+ intel_runtime_pm_put(dev_priv);
+ return ret;
}

int i915_get_reset_stats_ioctl(struct drm_device *dev,
--
1.8.5.3