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Red Hat Bugzilla – Attachment 154092 Details for
Bug 235956
rt2500 Inconsistent lock state
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[patch]
git-wireless-dev-rt2x00-locking-fix.patch
git-wireless-dev-rt2x00-locking-fix.patch (text/plain), 793 bytes, created by
John W. Linville
on 2007-05-04 01:37:03 UTC
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Description:
git-wireless-dev-rt2x00-locking-fix.patch
Filename:
MIME Type:
Creator:
John W. Linville
Created:
2007-05-04 01:37:03 UTC
Size:
793 bytes
patch
obsolete
>diff --git a/net/mac80211/ieee80211.c b/net/mac80211/ieee80211.c >index 5ac7af8..18e5491 100644 >--- a/net/mac80211/ieee80211.c >+++ b/net/mac80211/ieee80211.c >@@ -1814,12 +1814,19 @@ struct sk_buff * ieee80211_beacon_get(struct ieee80211_hw *hw, int if_id, > u8 *b_head, *b_tail; > int bh_len, bt_len; > >- bdev = dev_get_by_index(if_id); >+ /* rt2x00 calls us from hardirq context, so >+ * open code an _irq version of dev_get_by_index >+ * until we can find them another alternative... >+ */ >+ read_lock_irq(&dev_base_lock); >+ bdev = __dev_get_by_index(if_id); > if (bdev) { >+ dev_hold(bdev); > sdata = IEEE80211_DEV_TO_SUB_IF(bdev); > ap = &sdata->u.ap; > dev_put(bdev); > } >+ read_unlock_irq(&dev_base_lock); > > if (!ap || sdata->type != IEEE80211_IF_TYPE_AP || > !ap->beacon_head) {
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