svn commit: r279919 - head/sys/dev/drm2

[Jason A. Harmening]

Author: jah
Date: Thu Mar 12 14:18:36 2015
New Revision: 279919
URL: https://svnweb.freebsd.org/changeset/base/279919

Log:
  Using parent DMA tag in drm_pci_alloc().  This can allow drm2 devices to work with Intel DMAR enabled for the system, as long as DMAR is disabled for the drm2 device.
  
  Approved by:	kib (mentor)
  MFC after:	1 week

Modified:
  head/sys/dev/drm2/drm_pci.c

Modified: head/sys/dev/drm2/drm_pci.c
==============================================================================
--- head/sys/dev/drm2/drm_pci.c	Thu Mar 12 13:40:02 2015	(r279918)
+++ head/sys/dev/drm2/drm_pci.c	Thu Mar 12 14:18:36 2015	(r279919)
@@ -76,7 +76,9 @@ drm_pci_alloc(struct drm_device *dev, si
 	if (mtx_owned(&dev->dma_lock))
 	    DRM_ERROR("called while holding dma_lock\n");
 
-	ret = bus_dma_tag_create(NULL, align, 0, /* tag, align, boundary */
+	ret = bus_dma_tag_create(
+	    bus_get_dma_tag(dev->device), /* parent */
+	    align, 0, /* align, boundary */
 	    maxaddr, BUS_SPACE_MAXADDR, /* lowaddr, highaddr */
 	    NULL, NULL, /* filtfunc, filtfuncargs */
 	    size, 1, size, /* maxsize, nsegs, maxsegsize */