linux-kernel - [PATCH 4.0 43/60] drm/amdkfd: Initialize sdma vm when creating sdma queue

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Date:	Fri, 15 May 2015 16:14:44 -0700
From:	Greg Kroah-Hartman <gregkh@...uxfoundation.org>
To:	linux-kernel@...r.kernel.org
Cc:	Greg Kroah-Hartman <gregkh@...uxfoundation.org>,
	stable@...r.kernel.org, Xihan Zhang <xihan.zhang@....com>,
	Ben Goz <ben.goz@....comt>,
	Oded Gabbay <oded.gabbay@...il.com>,
	Alex Deucher <alexander.deucher@....com>
Subject: [PATCH 4.0 43/60] drm/amdkfd: Initialize sdma vm when creating sdma queue

4.0-stable review patch.  If anyone has any objections, please let me know.

------------------

From: Xihan Zhang <xihan.zhang@....com>

commit 79b066bd76d501cfe8328142153da301f5ca11d1 upstream.

This patch fixes a bug where sdma vm wasn't initialized when
an sdma queue was created in HWS mode.

This caused GPUVM faults to appear on dmesg and it is one of the
causes that SDMA queues are not working.

Signed-off-by: Xihan Zhang <xihan.zhang@....com>
Reviewed-by: Ben Goz <ben.goz@....comt>
Signed-off-by: Oded Gabbay <oded.gabbay@...il.com>
Reviewed-by: Alex Deucher <alexander.deucher@....com>
Signed-off-by: Greg Kroah-Hartman <gregkh@...uxfoundation.org>

---
 drivers/gpu/drm/amd/amdkfd/kfd_device_queue_manager.c |    2 ++
 1 file changed, 2 insertions(+)

--- a/drivers/gpu/drm/amd/amdkfd/kfd_device_queue_manager.c
+++ b/drivers/gpu/drm/amd/amdkfd/kfd_device_queue_manager.c
@@ -879,6 +879,8 @@ static int create_queue_cpsch(struct dev
 		return -ENOMEM;
 	}
 
+	init_sdma_vm(dqm, q, qpd);
+
 	retval = mqd->init_mqd(mqd, &q->mqd, &q->mqd_mem_obj,
 				&q->gart_mqd_addr, &q->properties);
 	if (retval != 0)


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