[patch 14/16] ipw2100: send WEXT scan events

Greg KH
2007-11-15T06:49:40Z

[-- Attachment #1: ipw2100-send-wext-scan-events.patch --]
[-- Type: text/plain, Size: 3618 bytes --]

-stable review patch. If anyone has any objections, please let us know.

------------------

From: Dan Williams <dcbw@redhat.com>

patch d20c678a450a25c1c12925f60c1b4cc040acc17d in mainline

ipw2100 wasn't sending WEXT scan events at all on scan completion. And
like ipw2200, the driver aggressively auto-scans, requiring
non-user-requested scan events to be batched together and sent at
specific intervals instead of many times per seconds.

Signed-off-by: Dan Williams <dcbw@redhat.com>
Signed-off-by: John W. Linville <linville@tuxdriver.com>
Signed-off-by: Greg Kroah-Hartman <gregkh@suse.de>

---
drivers/net/wireless/ipw2100.c | 39 +++++++++++++++++++++++++++++++++++++++
drivers/net/wireless/ipw2100.h | 4 ++++
2 files changed, 43 insertions(+)

--- a/drivers/net/wireless/ipw2100.c
+++ b/drivers/net/wireless/ipw2100.c
@@ -2102,12 +2102,46 @@ static void isr_indicate_rf_kill(struct
queue_delayed_work(priv->workqueue, &priv->rf_kill, round_jiffies(HZ));
}

+static void send_scan_event(void *data)
+{
+ struct ipw2100_priv *priv = data;
+ union iwreq_data wrqu;
+
+ wrqu.data.length = 0;
+ wrqu.data.flags = 0;
+ wireless_send_event(priv->net_dev, SIOCGIWSCAN, &wrqu, NULL);
+}
+
+static void ipw2100_scan_event_later(struct work_struct *work)
+{
+ send_scan_event(container_of(work, struct ipw2100_priv,
+ scan_event_later.work));
+}
+
+static void ipw2100_scan_event_now(struct work_struct *work)
+{
+ send_scan_event(container_of(work, struct ipw2100_priv,
+ scan_event_now));
+}
+
static void isr_scan_complete(struct ipw2100_priv *priv, u32 status)
{
IPW_DEBUG_SCAN("scan complete\n");
/* Age the scan results... */
priv->ieee->scans++;
priv->status &= ~STATUS_SCANNING;
+
+ /* Only userspace-requested scan completion events go out immediately */
+ if (!priv->user_requested_scan) {
+ if (!delayed_work_pending(&priv->scan_event_later))
+ queue_delayed_work(priv->workqueue,
+ &priv->scan_event_later,
+ round_jiffies(msecs_to_jiffies(4000)));
+ } else {
+ priv->user_requested_scan = 0;
+ cancel_delayed_work(&priv->scan_event_later);
+ queue_work(priv->workqueue, &priv->scan_event_now);
+ }
}

#ifdef CONFIG_IPW2100_DEBUG
@@ -4376,6 +4410,7 @@ static void ipw2100_kill_workqueue(struc
cancel_delayed_work(&priv->wx_event_work);
cancel_delayed_work(&priv->hang_check);
cancel_delayed_work(&priv->rf_kill);
+ cancel_delayed_work(&priv->scan_event_later);
destroy_workqueue(priv->workqueue);
priv->workqueue = NULL;
}
@@ -6118,6 +6153,8 @@ static struct net_device *ipw2100_alloc_
INIT_DELAYED_WORK(&priv->wx_event_work, ipw2100_wx_event_work);
INIT_DELAYED_WORK(&priv->hang_check, ipw2100_hang_check);
INIT_DELAYED_WORK(&priv->rf_kill, ipw2100_rf_kill);
+ INIT_WORK(&priv->scan_event_now, ipw2100_scan_event_now);
+ INIT_DELAYED_WORK(&priv->scan_event_later, ipw2100_scan_event_later);

tasklet_init(&priv->irq_tasklet, (void (*)(unsigned long))
ipw2100_irq_tasklet, (unsigned long)priv);
@@ -7427,6 +7464,8 @@ static int ipw2100_wx_set_scan(struct ne
}

IPW_DEBUG_WX("Initiating scan...\n");
+
+ priv->user_requested_scan = 1;
if (ipw2100_set_scan_options(priv) || ipw2100_start_scan(priv)) {
IPW_DEBUG_WX("Start scan failed.\n");

--- a/drivers/net/wireless/ipw2100.h
+++ b/drivers/net/wireless/ipw2100.h
@@ -588,6 +588,10 @@ struct ipw2100_priv {
struct delayed_work wx_event_work;
struct delayed_work hang_check;
struct delayed_work rf_kill;
+ struct work_struct scan_event_now;
+ struct delayed_work scan_event_later;
+
+ int user_requested_scan;

u32 interrupts;
int tx_interrupts;

--