From 98f62e3d5d7cd25b025f8410005cc3898dfa16e9 Mon Sep 17 00:00:00 2001 From: =?utf8?q?Herv=C3=A9=20Poussineau?= Date: Thu, 18 Aug 2016 09:31:29 +0200 Subject: [PATCH] lsi: never set DMA FIFO Empty (DFE) bit in DSTAT register MIME-Version: 1.0 Content-Type: text/plain; charset=utf8 Content-Transfer-Encoding: 8bit 53C895A datasheet says: "This bit (DFE) is a pure status bit and will not cause an interrupt" This bit is already auto-generated in lsi_read_reg when reading the DSTAT register. This fixes IBM RS/6000 7020 firmware, which is: - resetting the adapter - enabling all interrupt sources (including DIP, ie interrupts from DSTAT) - waiting for ISTAT0 to become 0 (including DIP=0, ie no interrupt coming from DSTAT) Signed-off-by: Hervé Poussineau Message-Id: <1471505489-1221-5-git-send-email-hpoussin@reactos.org> Signed-off-by: Paolo Bonzini Signed-off-by: Hervé Poussineau --- hw/scsi/lsi53c895a.c | 2 +- 1 file changed, 1 insertion(+), 1 deletion(-) diff --git a/hw/scsi/lsi53c895a.c b/hw/scsi/lsi53c895a.c index 2e99d5e93b..feb1191315 100644 --- a/hw/scsi/lsi53c895a.c +++ b/hw/scsi/lsi53c895a.c @@ -326,7 +326,7 @@ static void lsi_soft_reset(LSIState *s) s->istat0 = 0; s->istat1 = 0; s->dcmd = 0x40; - s->dstat = LSI_DSTAT_DFE; + s->dstat = 0; s->dien = 0; s->sist0 = 0; s->sist1 = 0; -- 2.11.0