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From: Florian Mickler <florian-sVu6HhrpSfRAfugRpC6u6w@public.gmane.org>
To: linux-wireless-u79uwXL29TY76Z2rM5mHXA@public.gmane.org
Cc: Florian Mickler <florian-sVu6HhrpSfRAfugRpC6u6w@public.gmane.org>,
	Reinette Chatre
	<reinette.chatre-ral2JQCrhuEAvxtiuMwx3w@public.gmane.org>,
	Wey-Yi Guy <wey-yi.w.guy-ral2JQCrhuEAvxtiuMwx3w@public.gmane.org>,
	Intel Linux Wireless
	<ilw-VuQAYsv1563Yd54FQh9/CA@public.gmane.org>,
	"John W. Linville"
	<linville-2XuSBdqkA4R54TAoqtyWWQ@public.gmane.org>,
	Johannes Berg
	<johannes.berg-ral2JQCrhuEAvxtiuMwx3w@public.gmane.org>,
	Zhu Yi <yi.zhu-ral2JQCrhuEAvxtiuMwx3w@public.gmane.org>,
	Ben Cahill <ben.m.cahill-ral2JQCrhuEAvxtiuMwx3w@public.gmane.org>,
	netdev-u79uwXL29TY76Z2rM5mHXA@public.gmane.org,
	linux-kernel-u79uwXL29TY76Z2rM5mHXA@public.gmane.org
Subject: [PATCH] iwl3945: queue the right work if the scan needs to be aborted
Date: Fri, 24 Sep 2010 18:22:01 +0200	[thread overview]
Message-ID: <1285345323-4250-1-git-send-email-florian@mickler.org> (raw)

iwl3945's scan_completed calls into the mac80211 stack which triggers a
warn on if there is no scan outstanding.

This can be avoided by not calling scan_completed but abort_scan in
iwl3945_request_scan  in the done: branch of the function which is used
as an error out.

The done: branch seems to be an error-out branch, as, for example, if
iwl_is_ready(priv) returns false  the done: branch is executed.

NOTE:
I'm not familiar with the driver at all.
I just quickly scanned as a reaction to

https://bugzilla.kernel.org/show_bug.cgi?id=17722

the users of scan_completed in the  iwl3945 driver and noted the odd
discrepancy between the comment above this instance and the comment in
mac80211 scan_completed function.

Signed-off-by: Florian Mickler <florian-sVu6HhrpSfRAfugRpC6u6w@public.gmane.org>
---
 drivers/net/wireless/iwlwifi/iwl-agn-lib.c  |    2 +-
 drivers/net/wireless/iwlwifi/iwl3945-base.c |    2 +-
 2 files changed, 2 insertions(+), 2 deletions(-)

diff --git a/drivers/net/wireless/iwlwifi/iwl-agn-lib.c b/drivers/net/wireless/iwlwifi/iwl-agn-lib.c
index 9dd9e64..8fd00a6 100644
--- a/drivers/net/wireless/iwlwifi/iwl-agn-lib.c
+++ b/drivers/net/wireless/iwlwifi/iwl-agn-lib.c
@@ -1411,7 +1411,7 @@ void iwlagn_request_scan(struct iwl_priv *priv, struct ieee80211_vif *vif)
 	clear_bit(STATUS_SCAN_HW, &priv->status);
 	clear_bit(STATUS_SCANNING, &priv->status);
 	/* inform mac80211 scan aborted */
-	queue_work(priv->workqueue, &priv->scan_completed);
+	queue_work(priv->workqueue, &priv->abort_scan);
 }
 
 int iwlagn_manage_ibss_station(struct iwl_priv *priv,
diff --git a/drivers/net/wireless/iwlwifi/iwl3945-base.c b/drivers/net/wireless/iwlwifi/iwl3945-base.c
index 59a308b..d31661c 100644
--- a/drivers/net/wireless/iwlwifi/iwl3945-base.c
+++ b/drivers/net/wireless/iwlwifi/iwl3945-base.c
@@ -3018,7 +3018,7 @@ void iwl3945_request_scan(struct iwl_priv *priv, struct ieee80211_vif *vif)
 	clear_bit(STATUS_SCANNING, &priv->status);
 
 	/* inform mac80211 scan aborted */
-	queue_work(priv->workqueue, &priv->scan_completed);
+	queue_work(priv->workqueue, &priv->abort_scan);
 }
 
 static void iwl3945_bg_restart(struct work_struct *data)
-- 
1.7.3

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             reply	other threads:[~2010-09-24 16:22 UTC|newest]

Thread overview: 8+ messages / expand[flat|nested]  mbox.gz  Atom feed  top
2010-09-24 16:22 Florian Mickler [this message]
2010-09-24 19:51 ` [PATCH] iwl3945: queue the right work if the scan needs to be aborted Guy, Wey-Yi
2010-09-27  6:13   ` Florian Mickler
2010-09-27 19:59     ` Guy, Wey-Yi W
2010-09-27 20:11 ` Guy, Wey-Yi
  -- strict thread matches above, loose matches on Subject: below --
2010-10-05  6:43 Fw: " Florian Mickler
2010-10-05  8:57 ` Stanislaw Gruszka
2010-10-05 10:12   ` Florian Mickler
     [not found]     ` <20101005121242.79cdafc2-mGsOIKOveelVRbCss4o9kg@public.gmane.org>
2010-10-05 10:43       ` Stanislaw Gruszka
     [not found]         ` <20101005104357.GB18833-H+wXaHxf7aLQT0dZR+AlfA@public.gmane.org>
2010-10-05 22:29           ` Florian Mickler

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