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pseries: Clear TCE and signal state when resetting PAPR VIO devices 

When we reset the system, the reset method for VIO bus devices resets
the state of their request queue (if present) as it should.  However
it was not resetting the state of their TCE table (DMA translation) if
present.  It was also not resetting the state of the per-device signal
mask set with H_VIO_SIGNAL.  This patch corrects both bugs, and also
removes some small code duplication in the reset paths.

Signed-off-by: David Gibson <david@gibson.dropbear.id.au>
Signed-off-by: Alexander Graf <agraf@suse.de>
This commit is contained in:
David Gibson 2012-09-12 16:57:13 +00:00 committed by Alexander Graf
parent 7f763a5d99
commit 4dd96f244f
1 changed files with 5 additions and 6 deletions
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11
hw/spapr_vio.c
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@ -324,9 +324,7 @@ static void spapr_vio_quiesce_one(VIOsPAPRDevice *dev)
}
dev->dma = spapr_tce_new_dma_context(liobn, pc->rtce_window_size);
dev->crq.qladdr = 0;
dev->crq.qsize = 0;
dev->crq.qnext = 0;
free_crq(dev);
}
static void rtas_set_tce_bypass(sPAPREnvironment *spapr, uint32_t token,
@ -409,9 +407,10 @@ static void spapr_vio_busdev_reset(DeviceState *qdev)
VIOsPAPRDevice *dev = DO_UPCAST(VIOsPAPRDevice, qdev, qdev);
VIOsPAPRDeviceClass *pc = VIO_SPAPR_DEVICE_GET_CLASS(dev);
if (dev->crq.qsize) {
free_crq(dev);
}
/* Shut down the request queue and TCEs if necessary */
spapr_vio_quiesce_one(dev);
dev->signal_state = 0;
if (pc->reset) {
pc->reset(dev);