libertas: add comment re: v10 firmware key handling

Comment text suggested by Dan Williams <dcbw@redhat.com> in
<1263952092.4481.2.camel@localhost.localdomain>.

Signed-off-by: John W. Linville <linville@tuxdriver.com>

1 files changed, 5 insertions, 0 deletions

diff --git a/drivers/net/wireless/libertas/assoc.c b/drivers/net/wireless/libertas/assoc.c
index 0979b07799a0..f03d5e4e59c3 100644
--- a/drivers/net/wireless/libertas/assoc.c
+++ b/drivers/net/wireless/libertas/assoc.c
@@ -2062,6 +2062,11 @@ void lbs_association_worker(struct work_struct *work)
                         goto out;
         }
 
+        /*
+         * v10 FW wants WPA keys to be set/cleared before WEP key operations,
+         * otherwise it will fail to correctly associate to WEP networks.
+         * Other firmware versions don't appear to care.
+         */
         if (test_bit(ASSOC_FLAG_WPA_MCAST_KEY, &assoc_req->flags) ||
             test_bit(ASSOC_FLAG_WPA_UCAST_KEY, &assoc_req->flags)) {
                 ret = assoc_helper_wpa_keys(priv, assoc_req);