svn commit: r199192 - head/sys/dev/e1000

[Jack F Vogel]

Author: jfv
Date: Wed Nov 11 19:13:40 2009
New Revision: 199192
URL: http://svn.freebsd.org/changeset/base/199192

Log:
  With an i386 kernel the igb driver can cause a
  page fault panic on initialization due to a large
  number of bounce pages being allocated. This is due
  to the dma tag requiring page alignment on mbuf mapping.
  This was removed some time back from the ixgbe driver
  and is not needed here either.

Modified:
  head/sys/dev/e1000/if_igb.c

Modified: head/sys/dev/e1000/if_igb.c
==============================================================================
--- head/sys/dev/e1000/if_igb.c	Wed Nov 11 19:00:12 2009	(r199191)
+++ head/sys/dev/e1000/if_igb.c	Wed Nov 11 19:13:40 2009	(r199192)
@@ -2654,7 +2654,7 @@ igb_dma_malloc(struct adapter *adapter, 
 	int error;
 
 	error = bus_dma_tag_create(bus_get_dma_tag(adapter->dev), /* parent */
-				IGB_DBA_ALIGN, 0,	/* alignment, bounds */
+				1, 0,			/* alignment, bounds */
 				BUS_SPACE_MAXADDR,	/* lowaddr */
 				BUS_SPACE_MAXADDR,	/* highaddr */
 				NULL, NULL,		/* filter, filterarg */
@@ -2867,7 +2867,7 @@ igb_allocate_transmit_buffers(struct tx_
 	 * Setup DMA descriptor areas.
 	 */
 	if ((error = bus_dma_tag_create(NULL,		/* parent */
-			       PAGE_SIZE, 0,		/* alignment, bounds */
+			       1, 0,			/* alignment, bounds */
 			       BUS_SPACE_MAXADDR,	/* lowaddr */
 			       BUS_SPACE_MAXADDR,	/* highaddr */
 			       NULL, NULL,		/* filter, filterarg */
@@ -3554,7 +3554,7 @@ igb_allocate_receive_buffers(struct rx_r
 	** it may not always use this.
 	*/
 	if ((error = bus_dma_tag_create(NULL,		/* parent */
-				   PAGE_SIZE, 0,	/* alignment, bounds */
+				   1, 0,		/* alignment, bounds */
 				   BUS_SPACE_MAXADDR,	/* lowaddr */
 				   BUS_SPACE_MAXADDR,	/* highaddr */
 				   NULL, NULL,		/* filter, filterarg */