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Commit ad6db200 authored by Harshdeep Dhatt's avatar Harshdeep Dhatt
Browse files

msm: kgsl: Do not switch pagetable if context is detached 



This is done to avoid a race condition between a context getting
detached and destroyed before the GPU has executed the pt switch
commands.

CRs-Fixed: 987587
Change-Id: I5c485e41a23b288f27e607b3e3ed5bf66cbad98a
Signed-off-by: default avatarHarshdeep Dhatt <hdhatt@codeaurora.org>
parent a8371783

drivers/gpu/msm/adreno_drawctxt.c

+9 −0
Original line number Original line Diff line number Diff line
@@ -570,6 +570,15 @@ int adreno_drawctxt_switch(struct adreno_device *adreno_dev, 
	if (rb->drawctxt_active == drawctxt)

	if (rb->drawctxt_active == drawctxt)

		return ret;

		return ret;





	/*

	 * Submitting pt switch commands from a detached context can

	 * lead to a race condition where the pt is destroyed before

	 * the pt switch commands get executed by the GPU, leading to

	 * pagefaults.

	 */

	if (drawctxt != NULL && kgsl_context_detached(&drawctxt->base))

		return -ENOENT;



	trace_adreno_drawctxt_switch(rb,

	trace_adreno_drawctxt_switch(rb,

		drawctxt, flags);

		drawctxt, flags);