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staging: unisys: Process more than one response per check

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When s-Par is in polling mode it checks every 2 ms to see if there is
a response from the IO service partition in the queue. Currently it
just reads one entry per 2 ms, this needs to be changed so it drains
the queue on each check.

Signed-off-by: David Kershner <david.kershner@unisys.com>
Signed-off-by: Benjamin Romer <benjamin.romer@unisys.com>
Signed-off-by: Greg Kroah-Hartman <gregkh@linuxfoundation.org>
This commit is contained in:
David Kershner
2015-07-24 12:00:21 -04:00
committed by Greg Kroah-Hartman
parent 3abf4f984a
commit 7c03621a79
1 changed files with 83 additions and 81 deletions
Download Patch File Download Diff File Expand all files Collapse all files
drivers/staging/unisys/visornic/visornic_main.c
+83 -81
View File
@@ -1629,93 +1629,95 @@ drain_queue(struct uiscmdrsp *cmdrsp, struct visornic_devdata *devdata)
/* TODO: CLIENT ACQUIRE -- Don't really need this at the
* moment */
if (!visorchannel_signalremove(devdata->dev->visorchannel,
IOCHAN_FROM_IOPART,
cmdrsp))
return; /* queue empty */
for (;;) {
if (!visorchannel_signalremove(devdata->dev->visorchannel,
IOCHAN_FROM_IOPART,
cmdrsp))
break; /* queue empty */
switch (cmdrsp->net.type) {
case NET_RCV:
devdata->chstat.got_rcv++;
/* process incoming packet */
visornic_rx(cmdrsp);
break;
case NET_XMIT_DONE:
spin_lock_irqsave(&devdata->priv_lock, flags);
devdata->chstat.got_xmit_done++;
if (cmdrsp->net.xmtdone.xmt_done_result)
devdata->chstat.xmit_fail++;
/* only call queue wake if we stopped it */
netdev = ((struct sk_buff *)cmdrsp->net.buf)->dev;
/* ASSERT netdev == vnicinfo->netdev; */
if ((netdev == devdata->netdev) &&
netif_queue_stopped(netdev)) {
/* check to see if we have crossed
* the lower watermark for
* netif_wake_queue()
*/
if (((devdata->chstat.sent_xmit >=
devdata->chstat.got_xmit_done) &&
(devdata->chstat.sent_xmit -
devdata->chstat.got_xmit_done <=
devdata->lower_threshold_net_xmits)) ||
((devdata->chstat.sent_xmit <
devdata->chstat.got_xmit_done) &&
(ULONG_MAX - devdata->chstat.got_xmit_done
+ devdata->chstat.sent_xmit <=
devdata->lower_threshold_net_xmits))) {
/* enough NET_XMITs completed
* so can restart netif queue
*/
netif_wake_queue(netdev);
devdata->flow_control_lower_hits++;
}
}
skb_unlink(cmdrsp->net.buf, &devdata->xmitbufhead);
spin_unlock_irqrestore(&devdata->priv_lock, flags);
kfree_skb(cmdrsp->net.buf);
break;
case NET_RCV_ENBDIS_ACK:
devdata->chstat.got_enbdisack++;
netdev = (struct net_device *)
cmdrsp->net.enbdis.context;
spin_lock_irqsave(&devdata->priv_lock, flags);
devdata->enab_dis_acked = 1;
spin_unlock_irqrestore(&devdata->priv_lock, flags);
if (kthread_should_stop())
switch (cmdrsp->net.type) {
case NET_RCV:
devdata->chstat.got_rcv++;
/* process incoming packet */
visornic_rx(cmdrsp);
break;
if (devdata->server_down &&
devdata->server_change_state) {
/* Inform Linux that the link is up */
devdata->server_down = false;
devdata->server_change_state = false;
netif_wake_queue(netdev);
netif_carrier_on(netdev);
}
break;
case NET_CONNECT_STATUS:
netdev = devdata->netdev;
if (cmdrsp->net.enbdis.enable == 1) {
case NET_XMIT_DONE:
spin_lock_irqsave(&devdata->priv_lock, flags);
devdata->enabled = cmdrsp->net.enbdis.enable;
spin_unlock_irqrestore(&devdata->priv_lock,
flags);
netif_wake_queue(netdev);
netif_carrier_on(netdev);
} else {
netif_stop_queue(netdev);
netif_carrier_off(netdev);
devdata->chstat.got_xmit_done++;
if (cmdrsp->net.xmtdone.xmt_done_result)
devdata->chstat.xmit_fail++;
/* only call queue wake if we stopped it */
netdev = ((struct sk_buff *)cmdrsp->net.buf)->dev;
/* ASSERT netdev == vnicinfo->netdev; */
if ((netdev == devdata->netdev) &&
netif_queue_stopped(netdev)) {
/* check to see if we have crossed
* the lower watermark for
* netif_wake_queue()
*/
if (((devdata->chstat.sent_xmit >=
devdata->chstat.got_xmit_done) &&
(devdata->chstat.sent_xmit -
devdata->chstat.got_xmit_done <=
devdata->lower_threshold_net_xmits)) ||
((devdata->chstat.sent_xmit <
devdata->chstat.got_xmit_done) &&
(ULONG_MAX - devdata->chstat.got_xmit_done
+ devdata->chstat.sent_xmit <=
devdata->lower_threshold_net_xmits))) {
/* enough NET_XMITs completed
* so can restart netif queue
*/
netif_wake_queue(netdev);
devdata->flow_control_lower_hits++;
}
}
skb_unlink(cmdrsp->net.buf, &devdata->xmitbufhead);
spin_unlock_irqrestore(&devdata->priv_lock, flags);
kfree_skb(cmdrsp->net.buf);
break;
case NET_RCV_ENBDIS_ACK:
devdata->chstat.got_enbdisack++;
netdev = (struct net_device *)
cmdrsp->net.enbdis.context;
spin_lock_irqsave(&devdata->priv_lock, flags);
devdata->enabled = cmdrsp->net.enbdis.enable;
spin_unlock_irqrestore(&devdata->priv_lock,
flags);
devdata->enab_dis_acked = 1;
spin_unlock_irqrestore(&devdata->priv_lock, flags);
if (kthread_should_stop())
break;
if (devdata->server_down &&
devdata->server_change_state) {
/* Inform Linux that the link is up */
devdata->server_down = false;
devdata->server_change_state = false;
netif_wake_queue(netdev);
netif_carrier_on(netdev);
}
break;
case NET_CONNECT_STATUS:
netdev = devdata->netdev;
if (cmdrsp->net.enbdis.enable == 1) {
spin_lock_irqsave(&devdata->priv_lock, flags);
devdata->enabled = cmdrsp->net.enbdis.enable;
spin_unlock_irqrestore(&devdata->priv_lock,
flags);
netif_wake_queue(netdev);
netif_carrier_on(netdev);
} else {
netif_stop_queue(netdev);
netif_carrier_off(netdev);
spin_lock_irqsave(&devdata->priv_lock, flags);
devdata->enabled = cmdrsp->net.enbdis.enable;
spin_unlock_irqrestore(&devdata->priv_lock,
flags);
}
break;
default:
break;
}
break;
default:
break;
/* cmdrsp is now available for reuse */
}
/* cmdrsp is now available for reuse */
}
/**