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authorDaniel Vetter <daniel.vetter@ffwll.ch>2015-11-23 10:32:53 +0100
committerDaniel Vetter <daniel.vetter@ffwll.ch>2015-12-01 10:05:11 +0100
commit737292a3c0f251a93dcce4bedf7e4accb35335bc (patch)
tree6849b21eb6b3ac4601174a91763c41dc5b6db95e /drivers/gpu/drm/gma500/gtt.c
parent0e3089fa50df00b963067aa5a34d5fc01d93802a (diff)
downloadop-kernel-dev-737292a3c0f251a93dcce4bedf7e4accb35335bc.zip
op-kernel-dev-737292a3c0f251a93dcce4bedf7e4accb35335bc.tar.gz
drm/gma500: Add driver private mutex for the fault handler
There's currently two places where the gma500 fault handler relies upon dev->struct_mutex: - To protect r->mappping - To make sure vm_insert_pfn isn't called concurrently (in which case the 2nd thread would get an error code). Everything else (specifically psb_gtt_pin) is already protected by some other locks. Hence just create a new driver-private mmap_mutex just for this function. With this gma500 is complete dev->struct_mutex free! Cc: Patrik Jakobsson <patrik.r.jakobsson@gmail.com> Acked-by: Patrik Jakobsson <patrik.r.jakobsson@gmail.com> Signed-off-by: Daniel Vetter <daniel.vetter@intel.com> Link: http://patchwork.freedesktop.org/patch/msgid/1448271183-20523-21-git-send-email-daniel.vetter@ffwll.ch
Diffstat (limited to 'drivers/gpu/drm/gma500/gtt.c')
-rw-r--r--drivers/gpu/drm/gma500/gtt.c1
1 files changed, 1 insertions, 0 deletions
diff --git a/drivers/gpu/drm/gma500/gtt.c b/drivers/gpu/drm/gma500/gtt.c
index ce015db..8f69225 100644
--- a/drivers/gpu/drm/gma500/gtt.c
+++ b/drivers/gpu/drm/gma500/gtt.c
@@ -425,6 +425,7 @@ int psb_gtt_init(struct drm_device *dev, int resume)
if (!resume) {
mutex_init(&dev_priv->gtt_mutex);
+ mutex_init(&dev_priv->mmap_mutex);
psb_gtt_alloc(dev);
}
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