This is a note to let you know that I've just added the patch titled
drm/i915: Fix lock dropping in intel_tv_detect()
to the 3.16-stable tree which can be found at:
http://www.kernel.org/git/?p=linux/kernel/git/stable/stable-queue.git;a=summary
The filename of the patch is:
drm-i915-fix-lock-dropping-in-intel_tv_detect.patch
and it can be found in the queue-3.16 subdirectory.
If you, or anyone else, feels it should not be added to the stable tree,
please let <stable@xxxxxxxxxxxxxxx> know about it.
>From bbfb44e8b688e778964275ab0862f67463ba4f84 Mon Sep 17 00:00:00 2001
From: =?UTF-8?q?Ville=20Syrj=C3=A4l=C3=A4?= <ville.syrjala@xxxxxxxxxxxxxxx>
Date: Tue, 2 Sep 2014 12:57:22 +0300
Subject: drm/i915: Fix lock dropping in intel_tv_detect()
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From: =?UTF-8?q?Ville=20Syrj=C3=A4l=C3=A4?= <ville.syrjala@xxxxxxxxxxxxxxx>
commit bbfb44e8b688e778964275ab0862f67463ba4f84 upstream.
When intel_tv_detect() fails to do load detection it would forget to
drop the locks and clean up the acquire context. Fix it up.
This is a regression from:
commit 208bf9fdcd3575aa4a5d48b3e0295f7cdaf6fc44
Author: Ville Syrjälä <ville.syrjala@xxxxxxxxxxxxxxx>
Date: Mon Aug 11 13:15:35 2014 +0300
drm/i915: Fix locking for intel_enable_pipe_a()
v2: Make the code more readable (Chris)
v3: Drop WARN_ON(type < 0) (Chris)
Cc: Tibor Billes <tbilles@xxxxxxx>
Reported-by: Tibor Billes <tbilles@xxxxxxx>
Tested-by: Tibor Billes <tbilles@xxxxxxx>
Reviewed-by: Chris Wilson <chris@xxxxxxxxxxxxxxxxxx>
Signed-off-by: Ville Syrjälä <ville.syrjala@xxxxxxxxxxxxxxx>
Signed-off-by: Jani Nikula <jani.nikula@xxxxxxxxx>
Signed-off-by: Greg Kroah-Hartman <gregkh@xxxxxxxxxxxxxxxxxxx>
---
drivers/gpu/drm/i915/intel_tv.c | 10 +++++++---
1 file changed, 7 insertions(+), 3 deletions(-)
--- a/drivers/gpu/drm/i915/intel_tv.c
+++ b/drivers/gpu/drm/i915/intel_tv.c
@@ -1311,6 +1311,7 @@ intel_tv_detect(struct drm_connector *co
{
struct drm_display_mode mode;
struct intel_tv *intel_tv = intel_attached_tv(connector);
+ enum drm_connector_status status;
int type;
DRM_DEBUG_KMS("[CONNECTOR:%d:%s] force=%d\n",
@@ -1328,16 +1329,19 @@ intel_tv_detect(struct drm_connector *co
if (intel_get_load_detect_pipe(connector, &mode, &tmp, &ctx)) {
type = intel_tv_detect_type(intel_tv, connector);
intel_release_load_detect_pipe(connector, &tmp);
+ status = type < 0 ?
+ connector_status_disconnected :
+ connector_status_connected;
} else
- return connector_status_unknown;
+ status = connector_status_unknown;
drm_modeset_drop_locks(&ctx);
drm_modeset_acquire_fini(&ctx);
} else
return connector->status;
- if (type < 0)
- return connector_status_disconnected;
+ if (status != connector_status_connected)
+ return status;
intel_tv->type = type;
intel_tv_find_better_format(connector);
Patches currently in stable-queue which might be from ville.syrjala@xxxxxxxxxxxxxxx are
queue-3.16/drm-i915-skip-load-detect-when-intel_crtc-new_enable-true.patch
queue-3.16/drm-i915-wait-for-vblank-before-enabling-the-tv-encoder.patch
queue-3.16/drm-i915-fix-lock-dropping-in-intel_tv_detect.patch
queue-3.16/drm-i915-don-t-try-to-retrain-a-dp-link-on-an-inactive-crtc.patch
queue-3.16/drm-i915-fix-locking-for-intel_enable_pipe_a.patch
queue-3.16/drm-i915-fix-plane-cursor-handling-when-runtime-suspended.patch
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