b43: Fix suspend/resume

This fixes suspend/resume.

We must not overwrite the MAC addresses on resume. Otherwise
the card won't ACK any packets anymore.

Signed-off-by: Michael Buesch <mb@bu3sch.de>
Signed-off-by: John W. Linville <linville@tuxdriver.com>
Signed-off-by: David S. Miller <davem@davemloft.net>

1 files changed, 17 insertions, 14 deletions

diff --git a/drivers/net/wireless/b43/xmit.c b/drivers/net/wireless/b43/xmit.c
index 3fc53e8b4416..7de2814d527e 100644
--- a/drivers/net/wireless/b43/xmit.c
+++ b/drivers/net/wireless/b43/xmit.c
@@ -237,20 +237,23 @@ void b43_generate_txhdr(struct b43_wldev *dev,
 
                 B43_WARN_ON(key_idx >= dev->max_nr_keys);
                 key = &(dev->key[key_idx]);
-                B43_WARN_ON(!key->keyconf);
-
-                /* Hardware appends ICV. */
-                plcp_fragment_len += txctl->icv_len;
-
-                key_idx = b43_kidx_to_fw(dev, key_idx);
-                mac_ctl |= (key_idx << B43_TXH_MAC_KEYIDX_SHIFT) &
-                           B43_TXH_MAC_KEYIDX;
-                mac_ctl |= (key->algorithm << B43_TXH_MAC_KEYALG_SHIFT) &
-                           B43_TXH_MAC_KEYALG;
-                wlhdr_len = ieee80211_get_hdrlen(fctl);
-                iv_len = min((size_t) txctl->iv_len,
-                             ARRAY_SIZE(txhdr->iv));
-                memcpy(txhdr->iv, ((u8 *) wlhdr) + wlhdr_len, iv_len);
+
+                if (likely(key->keyconf)) {
+                        /* This key is valid. Use it for encryption. */
+
+                        /* Hardware appends ICV. */
+                        plcp_fragment_len += txctl->icv_len;
+
+                        key_idx = b43_kidx_to_fw(dev, key_idx);
+                        mac_ctl |= (key_idx << B43_TXH_MAC_KEYIDX_SHIFT) &
+                                   B43_TXH_MAC_KEYIDX;
+                        mac_ctl |= (key->algorithm << B43_TXH_MAC_KEYALG_SHIFT) &
+                                   B43_TXH_MAC_KEYALG;
+                        wlhdr_len = ieee80211_get_hdrlen(fctl);
+                        iv_len = min((size_t) txctl->iv_len,
+                                     ARRAY_SIZE(txhdr->iv));
+                        memcpy(txhdr->iv, ((u8 *) wlhdr) + wlhdr_len, iv_len);
+                }
         }
         if (b43_is_old_txhdr_format(dev)) {
                 b43_generate_plcp_hdr((struct b43_plcp_hdr4 *)(&txhdr->old_format.plcp),