[PATCH 08/13] drm: tweak getconnector locking

From: Rob Clark <robdclark@gmail.com>
To: dri-devel@lists.freedesktop.org
Subject: [PATCH 08/13] drm: tweak getconnector locking
Date: Tue, 16 Dec 2014 18:05:36 -0500	[thread overview]
Message-ID: <1418771141-16954-9-git-send-email-robdclark@gmail.com> (raw)
In-Reply-To: <1418771141-16954-1-git-send-email-robdclark@gmail.com>

We need to hold connection_mutex as we read the properties.  Easiest
thing is just widen the scope where connection_mutex is held.

Signed-off-by: Rob Clark <robdclark@gmail.com>
---
 drivers/gpu/drm/drm_crtc.c | 5 ++---
 1 file changed, 2 insertions(+), 3 deletions(-)

diff --git a/drivers/gpu/drm/drm_crtc.c b/drivers/gpu/drm/drm_crtc.c
index 96965ec..62f5dc8 100644
--- a/drivers/gpu/drm/drm_crtc.c
+++ b/drivers/gpu/drm/drm_crtc.c
@@ -2043,6 +2043,7 @@ int drm_mode_getconnector(struct drm_device *dev, void *data,
 	DRM_DEBUG_KMS("[CONNECTOR:%d:?]\n", out_resp->connector_id);
 
 	mutex_lock(&dev->mode_config.mutex);
+	drm_modeset_lock(&dev->mode_config.connection_mutex, NULL);
 
 	connector = drm_connector_find(dev, out_resp->connector_id);
 	if (!connector) {
@@ -2076,14 +2077,11 @@ int drm_mode_getconnector(struct drm_device *dev, void *data,
 	out_resp->mm_height = connector->display_info.height_mm;
 	out_resp->subpixel = connector->display_info.subpixel_order;
 	out_resp->connection = connector->status;
-	drm_modeset_lock(&dev->mode_config.connection_mutex, NULL);
-
 	encoder = drm_connector_get_encoder(connector);
 	if (encoder)
 		out_resp->encoder_id = encoder->base.id;
 	else
 		out_resp->encoder_id = 0;
-	drm_modeset_unlock(&dev->mode_config.connection_mutex);
 
 	/*
 	 * This ioctl is called twice, once to determine how much space is
@@ -2149,6 +2147,7 @@ int drm_mode_getconnector(struct drm_device *dev, void *data,
 	out_resp->count_encoders = encoders_count;
 
 out:
+	drm_modeset_unlock(&dev->mode_config.connection_mutex);
 	mutex_unlock(&dev->mode_config.mutex);
 
 	return ret;
-- 
2.1.0

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