This is a note to let you know that I've just added the patch titled
drm/gma500: Lock struct_mutex around cursor updates
to the 3.12-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-gma500-lock-struct_mutex-around-cursor-updates.patch
and it can be found in the queue-3.12 subdirectory.
If you, or anyone else, feels it should not be added to the stable tree,
please let <stable@xxxxxxxxxxxxxxx> know about it.
>From 631794b44bd3dbfba37074954d5c584c9e8725f0 Mon Sep 17 00:00:00 2001
From: Patrik Jakobsson <patrik.r.jakobsson@xxxxxxxxx>
Date: Wed, 8 Jan 2014 19:30:40 +0100
Subject: drm/gma500: Lock struct_mutex around cursor updates
From: Patrik Jakobsson <patrik.r.jakobsson@xxxxxxxxx>
commit 631794b44bd3dbfba37074954d5c584c9e8725f0 upstream.
Bugzilla: https://bugzilla.kernel.org/show_bug.cgi?id=64361
Signed-off-by: Patrik Jakobsson <patrik.r.jakobsson@xxxxxxxxx>
Signed-off-by: Greg Kroah-Hartman <gregkh@xxxxxxxxxxxxxxxxxxx>
---
drivers/gpu/drm/gma500/gma_display.c | 12 ++++++++++--
1 file changed, 10 insertions(+), 2 deletions(-)
--- a/drivers/gpu/drm/gma500/gma_display.c
+++ b/drivers/gpu/drm/gma500/gma_display.c
@@ -349,6 +349,7 @@ int gma_crtc_cursor_set(struct drm_crtc
/* If we didn't get a handle then turn the cursor off */
if (!handle) {
temp = CURSOR_MODE_DISABLE;
+ mutex_lock(&dev->struct_mutex);
if (gma_power_begin(dev, false)) {
REG_WRITE(control, temp);
@@ -365,6 +366,7 @@ int gma_crtc_cursor_set(struct drm_crtc
gma_crtc->cursor_obj = NULL;
}
+ mutex_unlock(&dev->struct_mutex);
return 0;
}
@@ -374,9 +376,12 @@ int gma_crtc_cursor_set(struct drm_crtc
return -EINVAL;
}
+ mutex_lock(&dev->struct_mutex);
obj = drm_gem_object_lookup(dev, file_priv, handle);
- if (!obj)
- return -ENOENT;
+ if (!obj) {
+ ret = -ENOENT;
+ goto unlock;
+ }
if (obj->size < width * height * 4) {
dev_dbg(dev->dev, "Buffer is too small\n");
@@ -440,10 +445,13 @@ int gma_crtc_cursor_set(struct drm_crtc
}
gma_crtc->cursor_obj = obj;
+unlock:
+ mutex_unlock(&dev->struct_mutex);
return ret;
unref_cursor:
drm_gem_object_unreference(obj);
+ mutex_unlock(&dev->struct_mutex);
return ret;
}
Patches currently in stable-queue which might be from patrik.r.jakobsson@xxxxxxxxx are
queue-3.12/drm-gma500-lock-struct_mutex-around-cursor-updates.patch
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