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lsi: never set DMA FIFO Empty (DFE) bit in DSTAT register

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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 <hpoussin@reactos.org>
Message-Id: <1471505489-1221-5-git-send-email-hpoussin@reactos.org>
Signed-off-by: Paolo Bonzini <pbonzini@redhat.com>
Signed-off-by: Hervé Poussineau <hpoussin@reactos.org>
This commit is contained in:
Hervé Poussineau 2016-08-18 09:31:29 +02:00 committed by Paolo Bonzini
parent a8632434c7
commit 98f62e3d5d
1 changed files with 1 additions and 1 deletions
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2
hw/scsi/lsi53c895a.c
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@ -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;