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| author |   Jason Ekstrand <jason@jlekstrand.net> | 2018-09-26 02:17:03 -0500 |
|---|---|---|
| committer |   Sean Paul <seanpaul@chromium.org> | 2018-09-26 10:39:14 -0400 |
| commit | 337fe9f5c1e7de1f391c6a692531379d2aa2ee11 (patch) | |
| tree | 68dfd6b567200b460b9993f9e8f64f1cdc117ace /drivers | |
| parent | Linux 4.19-rc5 (diff) | |
| download | linux-dev-337fe9f5c1e7de1f391c6a692531379d2aa2ee11.tar.xz linux-dev-337fe9f5c1e7de1f391c6a692531379d2aa2ee11.zip | |
drm/syncobj: Don't leak fences when WAIT_FOR_SUBMIT is set
We attempt to get fences earlier in the hopes that everything will
already have fences and no callbacks will be needed. If we do succeed
in getting a fence, getting one a second time will result in a duplicate
ref with no unref. This is causing memory leaks in Vulkan applications
that create a lot of fences; playing for a few hours can, apparently,
bring down the system.
Cc: stable@vger.kernel.org
Bugzilla: https://bugs.freedesktop.org/show_bug.cgi?id=107899
Reviewed-by: Chris Wilson <chris@chris-wilson.co.uk>
Signed-off-by: Jason Ekstrand <jason@jlekstrand.net>
Signed-off-by: Sean Paul <seanpaul@chromium.org>
Link: https://patchwork.freedesktop.org/patch/msgid/20180926071703.15257-1-jason.ekstrand@intel.com
Diffstat (limited to 'drivers')
| -rw-r--r-- | drivers/gpu/drm/drm_syncobj.c | 5 |
1 files changed, 5 insertions, 0 deletions
diff --git a/drivers/gpu/drm/drm_syncobj.c b/drivers/gpu/drm/drm_syncobj.c index adb3cb27d31e..759278fef35a 100644 --- a/drivers/gpu/drm/drm_syncobj.c +++ b/drivers/gpu/drm/drm_syncobj.c @@ -97,6 +97,8 @@ static int drm_syncobj_fence_get_or_add_callback(struct drm_syncobj *syncobj, { int ret; + WARN_ON(*fence); + *fence = drm_syncobj_fence_get(syncobj); if (*fence) return 1; @@ -743,6 +745,9 @@ static signed long drm_syncobj_array_wait_timeout(struct drm_syncobj **syncobjs, if (flags & DRM_SYNCOBJ_WAIT_FLAGS_WAIT_FOR_SUBMIT) { for (i = 0; i < count; ++i) { + if (entries[i].fence) + continue; + drm_syncobj_fence_get_or_add_callback(syncobjs[i], &entries[i].fence, &entries[i].syncobj_cb, |