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From: Hans Petter Selasky <hselasky@FreeBSD.org>
Date: Tue, 20 Jan 2015 05:00:39 +0000 (UTC)
To: src-committers@freebsd.org, svn-src-all@freebsd.org,
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Subject: svn commit: r277407 - stable/10/sys/cam/scsi
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Author: hselasky
Date: Tue Jan 20 05:00:38 2015
New Revision: 277407
URL: https://svnweb.freebsd.org/changeset/base/277407

Log:
  MFC r276825 and r277372:
  Allow a block size of zero to mean 512 bytes, which is the most common
  block size for USB disks. This fixes support for "Action Cam SJ4000".

Modified:
  stable/10/sys/cam/scsi/scsi_da.c
Directory Properties:
  stable/10/   (props changed)

Modified: stable/10/sys/cam/scsi/scsi_da.c
==============================================================================
--- stable/10/sys/cam/scsi/scsi_da.c	Tue Jan 20 03:54:30 2015	(r277406)
+++ stable/10/sys/cam/scsi/scsi_da.c	Tue Jan 20 05:00:38 2015	(r277407)
@@ -3098,11 +3098,12 @@ dadone(struct cam_periph *periph, union 
 			 * give them an 'illegal' value we'll avoid that
 			 * here.
 			 */
-			if (block_size == 0 && maxsector == 0) {
+			if (block_size == 0) {
 				block_size = 512;
-				maxsector = -1;
+				if (maxsector == 0)
+					maxsector = -1;
 			}
-			if (block_size >= MAXPHYS || block_size == 0) {
+			if (block_size >= MAXPHYS) {
 				xpt_print(periph->path,
 				    "unsupportable block size %ju\n",
 				    (uintmax_t) block_size);