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Date: Tue, 06 May 2008 18:51:31 +0400 From: Pavel Emelyanov <xemul@...nvz.org> To: Johannes Berg <johannes@...solutions.net>, "John W. Linville" <linville@...driver.com> CC: David Miller <davem@...emloft.net>, linux-wireless@...r.kernel.org, Linux Netdev List <netdev@...r.kernel.org> Subject: [PATCH 3/4][MAC80211]: Fix potential scheduling while atomic in mesh_path_add. Calling synchronize_rcu() under write-lock-ed pathtbl_resize_lock may result in this warning (and other side effects). It looks safe just dropping this lock before calling synchronize_rcu. Signed-off-by: Pavel Emelyanov <xemul@...nvz.org> --- net/mac80211/mesh_pathtbl.c | 3 ++- 1 files changed, 2 insertions(+), 1 deletions(-) diff --git a/net/mac80211/mesh_pathtbl.c b/net/mac80211/mesh_pathtbl.c index 1d2d051..99c2d36 100644 --- a/net/mac80211/mesh_pathtbl.c +++ b/net/mac80211/mesh_pathtbl.c @@ -220,9 +220,10 @@ endadd: return -ENOMEM; } rcu_assign_pointer(mesh_paths, newtbl); + write_unlock(&pathtbl_resize_lock); + synchronize_rcu(); mesh_table_free(oldtbl, false); - write_unlock(&pathtbl_resize_lock); } endadd2: return err; -- 1.5.3.4 -- To unsubscribe from this list: send the line "unsubscribe netdev" in the body of a message to majordomo@...r.kernel.org More majordomo info at http://vger.kernel.org/majordomo-info.html
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