Merge tag 'mac80211-for-davem-2015-01-06' of git://git.kernel.org/pub/scm/linux/kerne...

Here's just a single fix - a revert of a patch that broke the
p54 and cw2100 drivers (arguably due to bad assumptions there.)
Since this affects kernels since 3.17, I decided to revert for
now and we'll revisit this optimisation properly for -next.

Signed-off-by: David S. Miller <davem@davemloft.net>

diff --git a/include/net/mac80211.h b/include/net/mac80211.h
index 58d719ddaa60c93d2c6424765e96abf254cb4dc6..29c7be8808d52b21e0c41949ce62d816d8b58372 100644 (file)
--- a/include/net/mac80211.h
+++ b/include/net/mac80211.h
@@ -1270,8 +1270,7 @@ struct ieee80211_vif *wdev_to_ieee80211_vif(struct wireless_dev *wdev);
  *
  * @IEEE80211_KEY_FLAG_GENERATE_IV: This flag should be set by the
  *     driver to indicate that it requires IV generation for this
- *     particular key. Setting this flag does not necessarily mean that SKBs
- *     will have sufficient tailroom for ICV or MIC.
+ *     particular key.
  * @IEEE80211_KEY_FLAG_GENERATE_MMIC: This flag should be set by
  *     the driver for a TKIP key if it requires Michael MIC
  *     generation in software.
@@ -1283,9 +1282,7 @@ struct ieee80211_vif *wdev_to_ieee80211_vif(struct wireless_dev *wdev);
  * @IEEE80211_KEY_FLAG_PUT_IV_SPACE: This flag should be set by the driver
  *     if space should be prepared for the IV, but the IV
  *     itself should not be generated. Do not set together with
- *     @IEEE80211_KEY_FLAG_GENERATE_IV on the same key. Setting this flag does
- *     not necessarily mean that SKBs will have sufficient tailroom for ICV or
- *     MIC.
+ *     @IEEE80211_KEY_FLAG_GENERATE_IV on the same key.
  * @IEEE80211_KEY_FLAG_RX_MGMT: This key will be used to decrypt received
  *     management frames. The flag can help drivers that have a hardware
  *     crypto implementation that doesn't deal with management frames

diff --git a/net/mac80211/key.c b/net/mac80211/key.c
index 0bb7038121ac5557ba90114b706f8cbc0e404af2..bd4e46ec32bd3d43473c2ee3ac2b0b9888d397de 100644 (file)
--- a/net/mac80211/key.c
+++ b/net/mac80211/key.c
@@ -140,7 +140,9 @@ static int ieee80211_key_enable_hw_accel(struct ieee80211_key *key)
        if (!ret) {
                key->flags |= KEY_FLAG_UPLOADED_TO_HARDWARE;
 
-               if (!(key->conf.flags & IEEE80211_KEY_FLAG_GENERATE_MMIC))
+               if (!((key->conf.flags & IEEE80211_KEY_FLAG_GENERATE_MMIC) ||
+                     (key->conf.flags & IEEE80211_KEY_FLAG_GENERATE_IV) ||
+                     (key->conf.flags & IEEE80211_KEY_FLAG_PUT_IV_SPACE)))
                        sdata->crypto_tx_tailroom_needed_cnt--;
 
                WARN_ON((key->conf.flags & IEEE80211_KEY_FLAG_PUT_IV_SPACE) &&
@@ -188,7 +190,9 @@ static void ieee80211_key_disable_hw_accel(struct ieee80211_key *key)
        sta = key->sta;
        sdata = key->sdata;
 
-       if (!(key->conf.flags & IEEE80211_KEY_FLAG_GENERATE_MMIC))
+       if (!((key->conf.flags & IEEE80211_KEY_FLAG_GENERATE_MMIC) ||
+             (key->conf.flags & IEEE80211_KEY_FLAG_GENERATE_IV) ||
+             (key->conf.flags & IEEE80211_KEY_FLAG_PUT_IV_SPACE)))
                increment_tailroom_need_count(sdata);
 
        ret = drv_set_key(key->local, DISABLE_KEY, sdata,
@@ -884,7 +888,9 @@ void ieee80211_remove_key(struct ieee80211_key_conf *keyconf)
        if (key->flags & KEY_FLAG_UPLOADED_TO_HARDWARE) {
                key->flags &= ~KEY_FLAG_UPLOADED_TO_HARDWARE;
 
-               if (!(key->conf.flags & IEEE80211_KEY_FLAG_GENERATE_MMIC))
+               if (!((key->conf.flags & IEEE80211_KEY_FLAG_GENERATE_MMIC) ||
+                     (key->conf.flags & IEEE80211_KEY_FLAG_GENERATE_IV) ||
+                     (key->conf.flags & IEEE80211_KEY_FLAG_PUT_IV_SPACE)))
                        increment_tailroom_need_count(key->sdata);
        }