From a4cd184503f448dda346d2338aa61cb560cc1b14 Mon Sep 17 00:00:00 2001 From: "David S. Miller" Date: Wed, 18 Jul 2007 00:06:22 -0700 Subject: [SPARC64]: Handle reset events in vio_link_state_change(). Signed-off-by: David S. Miller --- arch/sparc64/kernel/viohs.c | 29 +++++++++++++++++++++++++++++ 1 file changed, 29 insertions(+) (limited to 'arch') diff --git a/arch/sparc64/kernel/viohs.c b/arch/sparc64/kernel/viohs.c index 15613add45d1..8eb381fa0f28 100644 --- a/arch/sparc64/kernel/viohs.c +++ b/arch/sparc64/kernel/viohs.c @@ -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; -- cgit v1.2.1