We were returning without decrementing if the error happened, meaning
that at the next submit we wouldn't try to bring up the power domain.
Signed-off-by: Eric Anholt <e...@anholt.net>
---
I stumbled across this error when testing my CMA patch with a very low
(64MB) CMA area -- we would oops on the submit after the one that
failed.
drivers/gpu/drm/vc4/vc4_gem.c | 13 ++++++++-----
1 file changed, 8 insertions(+), 5 deletions(-)
diff --git a/drivers/gpu/drm/vc4/vc4_gem.c b/drivers/gpu/drm/vc4/vc4_gem.c
index 777a8d9afd60..735412e3725a 100644
--- a/drivers/gpu/drm/vc4/vc4_gem.c
+++ b/drivers/gpu/drm/vc4/vc4_gem.c
@@ -1016,13 +1016,16 @@ vc4_submit_cl_ioctl(struct drm_device *dev, void *data,
}
mutex_lock(&vc4->power_lock);
- if (vc4->power_refcount++ == 0)
+ if (vc4->power_refcount++ == 0) {
ret = pm_runtime_get_sync(&vc4->v3d->pdev->dev);
- mutex_unlock(&vc4->power_lock);
- if (ret < 0) {
- kfree(exec);
- return ret;
+ if (ret < 0) {
+ mutex_unlock(&vc4->power_lock);
+ vc4->power_refcount--;
+ kfree(exec);
+ return ret;
+ }
}
+ mutex_unlock(&vc4->power_lock);
exec->args = args;
INIT_LIST_HEAD(&exec->unref_list);
--
2.11.0
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