Hi Johannes,
> > In .join_ibss handler, mwifiex driver sends a command to firmware to start/join an IBSS network.
> > This command is a synchronous call. When the command response comes
> > back we have started/joined it successfully, otherwise an error code
> > will be returned. However, we are still inside .join_ibss handler at
> > this moment. Calling cfg80211_ibss_joined() gives us the warning
> > because ssid_len hasn't been set by cfg80211 yet.
>
> Hmm. Interesting, because I would think that could potentially take
> quite a while?
>
> It's interesting though because it points out that even if you do call
> it asynchronously, there's no guarantee that it actually happens before
> the function call returns. Maybe we should just move the assignment in
> cfg80211 instead?
Can we use "sme_state != CFG80211_SME_CONNECTING" check for ibss path too?
---
diff --git a/net/wireless/ibss.c b/net/wireless/ibss.c
index 30f20fe..3d0930d 100644
--- a/net/wireless/ibss.c
+++ b/net/wireless/ibss.c
@@ -42,6 +42,7 @@ void __cfg80211_ibss_joined(struct net_device *dev, const u8 *bssid)
cfg80211_hold_bss(bss_from_pub(bss));
wdev->current_bss = bss_from_pub(bss);
+ wdev->sme_state = CFG80211_SME_CONNECTED;
cfg80211_upload_connect_keys(wdev);
nl80211_send_ibss_bssid(wiphy_to_dev(wdev->wiphy), dev, bssid,
@@ -60,7 +61,7 @@ void cfg80211_ibss_joined(struct net_device *dev, const u8 *bssid, gfp_t gfp)
struct cfg80211_event *ev;
unsigned long flags;
- CFG80211_DEV_WARN_ON(!wdev->ssid_len);
+ CFG80211_DEV_WARN_ON(wdev->sme_state != CFG80211_SME_CONNECTING);
ev = kzalloc(sizeof(*ev), gfp);
if (!ev)
@@ -115,9 +116,11 @@ int __cfg80211_join_ibss(struct cfg80211_registered_device *rdev,
#ifdef CONFIG_CFG80211_WEXT
wdev->wext.ibss.channel = params->channel;
#endif
+ wdev->sme_state = CFG80211_SME_CONNECTING;
err = rdev->ops->join_ibss(&rdev->wiphy, dev, params);
if (err) {
wdev->connect_keys = NULL;
+ wdev->sme_state = CFG80211_SME_IDLE;
return err;
}
@@ -169,6 +172,7 @@ static void __cfg80211_clear_ibss(struct net_device *dev, bool nowext)
}
wdev->current_bss = NULL;
+ wdev->sme_state = CFG80211_SME_IDLE;
wdev->ssid_len = 0;
#ifdef CONFIG_CFG80211_WEXT
if (!nowext)
--
Thanks,
Bing
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