From 53fb2a7ac93e793e9b9f03c0e4ad7c8aa6beff60 Mon Sep 17 00:00:00 2001
From: Alexander Motin <mav@FreeBSD.org>
Date: Fri, 20 Feb 2009 20:20:00 +0000
Subject: [PATCH] Disable port interrupts before doing PHY reset. PHY reset
 causes drive connect/disconnect events, unwanted at this moment.

---
 sys/dev/ata/chipsets/ata-ahci.c | 3 +++
 1 file changed, 3 insertions(+)

diff --git a/sys/dev/ata/chipsets/ata-ahci.c b/sys/dev/ata/chipsets/ata-ahci.c
index f77f3d86a99..6ec31010d25 100644
--- a/sys/dev/ata/chipsets/ata-ahci.c
+++ b/sys/dev/ata/chipsets/ata-ahci.c
@@ -679,6 +679,9 @@ ata_ahci_reset(device_t dev)
     u_int32_t signature;
     int offset = ch->unit << 7;
 
+    /* Disable port interrupts */
+    ATA_OUTL(ctlr->r_res2, ATA_AHCI_P_IE + offset, 0);
+
     /* setup work areas */
     work = ch->dma.work_bus + ATA_AHCI_CL_OFFSET;
     ATA_OUTL(ctlr->r_res2, ATA_AHCI_P_CLB + offset, work & 0xffffffff);