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Commit e8c82574 authored by Lynus Vaz's avatar Lynus Vaz
Browse files

msm: kgsl: Bail out when two threads add sparse bindings 



If we find that a different thread has already added bindings at the
same offset we wanted to add to the sparse object, don't get stuck in
an infinite loop, and return with an error.

Change-Id: I6b17c91eccb14c07e13cae24135dfe7b13f3301d
Signed-off-by: default avatarLynus Vaz <lvaz@codeaurora.org>
parent 4e64e456

drivers/gpu/msm/kgsl.c

+8 −2
Original line number Diff line number Diff line
@@ -3489,10 +3489,16 @@ static int _sparse_add_to_bind_tree(struct kgsl_mem_entry *entry, 
		parent = *node;

		this = rb_entry(parent, struct sparse_bind_object, node);



		if (new->v_off < this->v_off)

		if ((new->v_off < this->v_off) &&

			((new->v_off + new->size) <= this->v_off))

			node = &parent->rb_left;

		else if (new->v_off > this->v_off)

		else if ((new->v_off > this->v_off) &&

			(new->v_off >= (this->v_off + this->size)))

			node = &parent->rb_right;

		else {

			kfree(new);

			return -EADDRINUSE;

		}

	}



	rb_link_node(&new->node, parent, node);