msm: kgsl: Protect the memdesc->gpuaddr in SVM use cases
When SVM is being used there can only be one GPU address assigned
to the memory descriptor. Don't allow the GPU address to be changed
after it has been negotiated the first time by a process.
Change-Id: Ic0dedbad2a1b3ccdc2c1598a6c501b2be288d64e
Signed-off-by: Jordan Crouse <jcrouse@codeaurora.org>
Signed-off-by: Harshitha Sai Neelati <hsaine@codeaurora.org>
Signed-off-by: Pranav Patel <pranavp@codeaurora.org>
Issue: FP3SEC-127
(cherry picked from commit 286b115bad6c40288f69fb765f63013dde9e4a93)
diff --git a/drivers/gpu/msm/kgsl.h b/drivers/gpu/msm/kgsl.h
index 75d2c40..8e4f0ea 100644
--- a/drivers/gpu/msm/kgsl.h
+++ b/drivers/gpu/msm/kgsl.h
@@ -234,6 +234,11 @@
struct page **pages;
unsigned int page_count;
unsigned int cur_bindings;
+ /*
+ * @lock: Spinlock to protect the gpuaddr from being accessed by
+ * multiple entities trying to map the same SVM region at once
+ */
+ spinlock_t lock;
};
/*