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From: Zbigniew Bodek <zbb@FreeBSD.org>
Date: Thu, 2 Jan 2014 11:24:04 +0000 (UTC)
To: src-committers@freebsd.org, svn-src-all@freebsd.org,
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Subject: svn commit: r260189 - head/sys/dev/ahci
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Author: zbb
Date: Thu Jan  2 11:24:04 2014
New Revision: 260189
URL: http://svnweb.freebsd.org/changeset/base/260189

Log:
  Revert r260165: Proper configuration of unmapped_buf_allowed should be used
  
  To avoid failures in bus_dmamap_sync() on ARM unmapped_buf_allowed should
  be set to 0. Hence, ARM-specific changes in AHCI should not be applied.

Modified:
  head/sys/dev/ahci/ahci.c

Modified: head/sys/dev/ahci/ahci.c
==============================================================================
--- head/sys/dev/ahci/ahci.c	Thu Jan  2 10:18:39 2014	(r260188)
+++ head/sys/dev/ahci/ahci.c	Thu Jan  2 11:24:04 2014	(r260189)
@@ -3066,15 +3066,7 @@ ahciaction(struct cam_sim *sim, union cc
 		if (ch->caps & AHCI_CAP_SPM)
 			cpi->hba_inquiry |= PI_SATAPM;
 		cpi->target_sprt = 0;
-#ifdef __arm__
-		/*
-		 * Do not use unmapped buffers on ARM. Doing so will cause
-		 * failure inside bus_dmamap_sync due to lack of VA.
-		 */
-		cpi->hba_misc = PIM_SEQSCAN;
-#else
 		cpi->hba_misc = PIM_SEQSCAN | PIM_UNMAPPED;
-#endif
 		cpi->hba_eng_cnt = 0;
 		if (ch->caps & AHCI_CAP_SPM)
 			cpi->max_target = 15;