From 12552883f5e848a56b2e93ef7d178af7cfa8dc87 Mon Sep 17 00:00:00 2001
From: David du Colombier <0intro@gmail.com>
Date: Tue, 14 Jan 2003 00:00:00 +0000
Subject: [PATCH] Plan 9 from Bell Labs 2003-01-14

---
 pc/sdata.c | 13 +++++++++++--
 1 file changed, 11 insertions(+), 2 deletions(-)

diff --git a/pc/sdata.c b/pc/sdata.c
index 2254f95130b108fa3eec8598fd034ef45c1c7bef..2c3751ae1b982a108f8089472ba4077a37972a14 100644
--- a/pc/sdata.c
+++ b/pc/sdata.c
@@ -979,6 +979,7 @@ atadmasetup(Drive* drive, int len)
 	 */
 	if(prd == nil){
 		drive->dmactl = 0;
+		print("disabling dma: not on a busmastering controller\n");
 		return -1;
 	}
 
@@ -1283,8 +1284,10 @@ atageniostart(Drive* drive, int lba)
 static int
 atagenioretry(Drive* drive)
 {
-	if(drive->dmactl)
+	if(drive->dmactl){
 		drive->dmactl = 0;
+		print("atagenioretry: disabling dma\n");
+	}
 	else if(drive->rwmctl)
 		drive->rwmctl = 0;
 	else
@@ -1713,9 +1716,15 @@ atapnp(void)
 		case (0x0571<<16)|0x1106:	/* VIA 82C686 */
 		case (0x0211<<16)|0x1166:	/* ServerWorks IB6566 */
 		case (0x1230<<16)|0x8086:	/* 82371FB (PIIX) */
-		case (0x248A<<16)|0x8086:	/* 82801BAM ICH2-M */
 		case (0x7010<<16)|0x8086:	/* 82371SB (PIIX3) */
 		case (0x7111<<16)|0x8086:	/* 82371[AE]B (PIIX4[E]) */
+		case (0x2411<<16)|0x8086:	/* 82801AA (ICH) */
+		case (0x2421<<16)|0x8086:	/* 82801AB (ICH0) */
+		case (0x244A<<16)|0x8086:	/* 82801BA (ICH2, Mobile) */
+		case (0x244B<<16)|0x8086:	/* 82801BA (ICH2, High-End) */
+		case (0x248A<<16)|0x8086:	/* 82801CA (ICH3, Mobile) */
+		case (0x248B<<16)|0x8086:	/* 82801CA (ICH3, High-End) */
+		case (0x24CB<<16)|0x8086:	/* 82801DB (ICH4, High-End) */
 			break;
 		}