gpu: ion: Take handle reference in ion_vma_open
When ion_vma_open is called, a reference to the handle in
the vma must be taken. Otherwise, if forking occurs,
ion_vma_close will be called twice which will leave one of
the calls with an invalid reference.
Change-Id: I9ab6e68ab6b1d2ac4bed4f45045b4b2ee39995e8
Signed-off-by: Laura Abbott <lauraa@codeaurora.org>
diff --git a/drivers/gpu/ion/ion.c b/drivers/gpu/ion/ion.c
index e659df5..1428315 100644
--- a/drivers/gpu/ion/ion.c
+++ b/drivers/gpu/ion/ion.c
@@ -1168,6 +1168,7 @@
vma->vm_private_data = NULL;
return;
}
+ ion_handle_get(handle);
mutex_lock(&buffer->lock);
buffer->umap_cnt++;
mutex_unlock(&buffer->lock);