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[SPARC64]: Handle reset events in vio_link_state_change().

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Signed-off-by: David S. Miller <davem@davemloft.net>
This commit is contained in:
David S. Miller 2007-07-18 00:06:22 -07:00
parent 8a2950cce6
commit a4cd184503
1 changed files with 29 additions and 0 deletions
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29
arch/sparc64/kernel/viohs.c
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@ -78,6 +78,23 @@ static int start_handshake(struct vio_driver_state *vio)
return 0;
}
static void flush_rx_dring(struct vio_driver_state *vio)
{
struct vio_dring_state *dr;
u64 ident;
BUG_ON(!(vio->dr_state & VIO_DR_STATE_RXREG));
dr = &vio->drings[VIO_DRIVER_RX_RING];
ident = dr->ident;
BUG_ON(!vio->desc_buf);
kfree(vio->desc_buf);
memset(dr, 0, sizeof(*dr));
dr->ident = ident;
}
void vio_link_state_change(struct vio_driver_state *vio, int event)
{
if (event == LDC_EVENT_UP) {
@ -98,6 +115,16 @@ void vio_link_state_change(struct vio_driver_state *vio, int event)
break;
}
start_handshake(vio);
} else if (event == LDC_EVENT_RESET) {
vio->hs_state = VIO_HS_INVALID;
if (vio->dr_state & VIO_DR_STATE_RXREG)
flush_rx_dring(vio);
vio->dr_state = 0x00;
memset(&vio->ver, 0, sizeof(vio->ver));
ldc_disconnect(vio->lp);
}
}
EXPORT_SYMBOL(vio_link_state_change);
@ -396,6 +423,8 @@ static int process_dreg_info(struct vio_driver_state *vio,
if (vio->dr_state & VIO_DR_STATE_RXREG)
goto send_nack;
BUG_ON(vio->desc_buf);
vio->desc_buf = kzalloc(pkt->descr_size, GFP_ATOMIC);
if (!vio->desc_buf)
goto send_nack;