From: johannes@sipsolutions.net Date: Tue, 11 Apr 2006 08:58:06 +0000 (+0200) Subject: [PATCH] softmac: return -EAGAIN from getscan while scanning X-Git-Tag: v2.6.17-rc3~57^2^2~11 X-Git-Url: https://err.no/cgi-bin/gitweb.cgi?a=commitdiff_plain;h=ba2f8c18756b4a99c8cd3ab6526b2ed7a8f18ead;p=linux-2.6 [PATCH] softmac: return -EAGAIN from getscan while scanning Below patch was developed after discussion with Daniel Drake who mentioned to me that wireless tools expect an EAGAIN return from getscan so that they can wait for the scan to finish before printing out the results. Signed-off-by: Johannes Berg Signed-off-by: John W. Linville --- diff --git a/net/ieee80211/softmac/ieee80211softmac_wx.c b/net/ieee80211/softmac/ieee80211softmac_wx.c index b559aa9b55..00f0d4f718 100644 --- a/net/ieee80211/softmac/ieee80211softmac_wx.c +++ b/net/ieee80211/softmac/ieee80211softmac_wx.c @@ -41,13 +41,23 @@ ieee80211softmac_wx_trigger_scan(struct net_device *net_dev, EXPORT_SYMBOL_GPL(ieee80211softmac_wx_trigger_scan); +/* if we're still scanning, return -EAGAIN so that userspace tools + * can get the complete scan results, otherwise return 0. */ int ieee80211softmac_wx_get_scan_results(struct net_device *net_dev, struct iw_request_info *info, union iwreq_data *data, char *extra) { + unsigned long flags; struct ieee80211softmac_device *sm = ieee80211_priv(net_dev); + + spin_lock_irqsave(&sm->lock, flags); + if (sm->scanning) { + spin_unlock_irqrestore(&sm->lock, flags); + return -EAGAIN; + } + spin_unlock_irqrestore(&sm->lock, flags); return ieee80211_wx_get_scan(sm->ieee, info, data, extra); } EXPORT_SYMBOL_GPL(ieee80211softmac_wx_get_scan_results);