From 8095b3cf9cadbcf42a0e5fdcf3fb32cf87c55798 Mon Sep 17 00:00:00 2001 From: Deepak Nibade Date: Thu, 4 Sep 2014 19:32:00 +0530 Subject: gpu: nvgpu: get VM reference for TSG We store a reference to common address space of channels in struct tsg_gk20a without increasing the refcount This could result in freeing the address space even when some channel in TSG needs it or when we need to free common gr_ctx Fix this by getting ref using gk20a_vm_get() when we store the VM reference. We drop this reference with gk20a_vm_put() when closing the TSG Bug 1470692 Change-Id: Ifc1f29d32cd721810bfbb5a4db96095770318c17 Signed-off-by: Deepak Nibade Reviewed-on: http://git-master/r/495668 Reviewed-by: Terje Bergstrom Tested-by: Terje Bergstrom --- drivers/gpu/nvgpu/gk20a/tsg_gk20a.c | 4 +++- 1 file changed, 3 insertions(+), 1 deletion(-) (limited to 'drivers/gpu/nvgpu/gk20a/tsg_gk20a.c') diff --git a/drivers/gpu/nvgpu/gk20a/tsg_gk20a.c b/drivers/gpu/nvgpu/gk20a/tsg_gk20a.c index e7b70894..849c3f6a 100644 --- a/drivers/gpu/nvgpu/gk20a/tsg_gk20a.c +++ b/drivers/gpu/nvgpu/gk20a/tsg_gk20a.c @@ -161,8 +161,10 @@ static void gk20a_tsg_release(struct kref *ref) gr_gk20a_free_tsg_gr_ctx(tsg); tsg->tsg_gr_ctx = NULL; } - if (tsg->vm) + if (tsg->vm) { + gk20a_vm_put(tsg->vm); tsg->vm = NULL; + } release_used_tsg(&g->fifo, tsg); -- cgit v1.2.2