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scsi: Fix SCSI bus reset

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When the controller raises the SCSI reset line, we have to perform the
requested reset on all disks attached to the controller's bus. Moreover,
reset is edge triggered, so avoid repeating it if the line was already
high.

Signed-off-by: Jan Kiszka <jan.kiszka@siemens.com>
Signed-off-by: Anthony Liguori <aliguori@us.ibm.com>
This commit is contained in:
Jan Kiszka 2010-07-06 10:58:03 +02:00 committed by Anthony Liguori
parent 262ea18e89
commit 680a34eeb8
1 changed files with 13 additions and 2 deletions
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15
hw/lsi53c895a.c
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@ -1590,8 +1590,19 @@ static void lsi_reg_writeb(LSIState *s, int offset, uint8_t val)
BADF("Immediate Arbritration not implemented\n");
}
if (val & LSI_SCNTL1_RST) {
s->sstat0 |= LSI_SSTAT0_RST;
lsi_script_scsi_interrupt(s, LSI_SIST0_RST, 0);
if (!(s->sstat0 & LSI_SSTAT0_RST)) {
DeviceState *dev;
int id;
for (id = 0; id < s->bus.ndev; id++) {
if (s->bus.devs[id]) {
dev = &s->bus.devs[id]->qdev;
dev->info->reset(dev);
}
}
s->sstat0 |= LSI_SSTAT0_RST;
lsi_script_scsi_interrupt(s, LSI_SIST0_RST, 0);
}
} else {
s->sstat0 &= ~LSI_SSTAT0_RST;
}