[src/trunk]: src/sys/dev/ic Fix "mvsata:0:0:1: buffer load failed: error=27" ...

[tsutsui <tsutsui%NetBSD.org@localhost>]

details:   https://anonhg.NetBSD.org/src/rev/79cb45d41dd8
branches:  trunk
changeset: 452233:79cb45d41dd8
user:      tsutsui <tsutsui%NetBSD.org@localhost>
date:      Sun Jun 23 06:29:22 2019 +0000

description:
Fix "mvsata:0:0:1: buffer load failed: error=27" failure.  PR/54205

Ok'ed by jdolecek@.
Should be pulled up to netbsd-8.

diffstat:

 sys/dev/ic/mvsata.c |  9 +++++----
 1 files changed, 5 insertions(+), 4 deletions(-)

diffs (37 lines):

diff -r 73da8cca0a69 -r 79cb45d41dd8 sys/dev/ic/mvsata.c
--- a/sys/dev/ic/mvsata.c       Sun Jun 23 02:14:14 2019 +0000
+++ b/sys/dev/ic/mvsata.c       Sun Jun 23 06:29:22 2019 +0000
@@ -1,4 +1,4 @@
-/*     $NetBSD: mvsata.c,v 1.46 2018/11/12 20:54:03 jdolecek Exp $     */
+/*     $NetBSD: mvsata.c,v 1.47 2019/06/23 06:29:22 tsutsui Exp $      */
 /*
  * Copyright (c) 2008 KIYOHARA Takashi
  * All rights reserved.
@@ -26,7 +26,7 @@
  */
 
 #include <sys/cdefs.h>
-__KERNEL_RCSID(0, "$NetBSD: mvsata.c,v 1.46 2018/11/12 20:54:03 jdolecek Exp $");
+__KERNEL_RCSID(0, "$NetBSD: mvsata.c,v 1.47 2019/06/23 06:29:22 tsutsui Exp $");
 
 #include "opt_mvsata.h"
 
@@ -113,7 +113,8 @@
                                           sending a cmd */
 #define ATAPI_MODE_DELAY       1000    /* 1s, timeout for SET_FEATURE cmds */
 
-#define MVSATA_EPRD_MAX_SIZE   (sizeof(struct eprd) * (MAXPHYS / PAGE_SIZE))
+#define MVSATA_MAX_SEGS                (MAXPHYS / PAGE_SIZE + 1)
+#define MVSATA_EPRD_MAX_SIZE   (sizeof(struct eprd) * MVSATA_MAX_SEGS)
 
 
 static void mvsata_probe_drive(struct ata_channel *);
@@ -3110,7 +3111,7 @@
        }
        for (i = 0; i < MVSATA_EDMAQ_LEN; i++) {
                rv = bus_dmamap_create(mvport->port_dmat, MAXPHYS,
-                   MAXPHYS / PAGE_SIZE, MAXPHYS, 0, BUS_DMA_NOWAIT,
+                   MVSATA_MAX_SEGS, MAXPHYS, 0, BUS_DMA_NOWAIT,
                    &mvport->port_reqtbl[i].data_dmamap);
                if (rv != 0) {
                        aprint_error("%s:%d:%d:"