gpu: ion: Add scan for leaked userspace fds
The ION_IOC_MAP/ION_IOC_SHARE ioctls take a reference to
an ion buffer. If the fd generated by the ioctl is never
closed, the buffer will never be freed. This is a pain to
track down in userspace. Add a debugfs entry to do a scan
of all the buffers and check which ones have no handle
associated with them. If a buffer has no handle associated
with it, that means the last reference is an fd. There
isn't a good way to directly associate an fd with a buffer,
but this can at least be a starting point for tracking down
leaks.
Change-Id: I64eedd6a30d8298b2aa75532c7fad506542910f6
Signed-off-by: Laura Abbott <lauraa@codeaurora.org>
diff --git a/drivers/gpu/ion/ion_priv.h b/drivers/gpu/ion/ion_priv.h
index 10e2219..888b599 100644
--- a/drivers/gpu/ion/ion_priv.h
+++ b/drivers/gpu/ion/ion_priv.h
@@ -72,6 +72,7 @@
int dmap_cnt;
struct scatterlist *sglist;
int umap_cnt;
+ int marked;
};
/**