[MAC80211]: fix preamble setting

It looks like in commit 28487a90 the condition was unintentionally
negated by moving some code, fix it.

Signed-off-by: Johannes Berg <johannes@sipsolutions.net>
Cc: Daniel Drake <dsd@gentoo.org>
Acked-by: Michael Wu <flamingice@sourmilk.net>
Signed-off-by: John W. Linville <linville@tuxdriver.com>
Signed-off-by: David S. Miller <davem@davemloft.net>

1 files changed, 1 insertions, 1 deletions

diff --git a/net/mac80211/ieee80211_ioctl.c b/net/mac80211/ieee80211_ioctl.c
index 8296e7de12c..d48f3aa30e3 100644
--- a/net/mac80211/ieee80211_ioctl.c
+++ b/net/mac80211/ieee80211_ioctl.c
@@ -821,7 +821,7 @@ static int ieee80211_ioctl_prism2_param(struct net_device *dev,
                 break;
 
         case PRISM2_PARAM_PREAMBLE:
-                if (sdata->type != IEEE80211_IF_TYPE_AP) {
+                if (sdata->type == IEEE80211_IF_TYPE_AP) {
                         if (value)
                                 sdata->flags |= IEEE80211_SDATA_SHORT_PREAMBLE;
                         else