b43: use temporary rate_index for error checking

The mac80211 rate_index changed to be a u8, so
can't hold the negative error value properly.
Use a temporary variable for error checking.

Reported-by: Dan Carpenter <dan.carpenter@oracle.com>
Signed-off-by: Johannes Berg <johannes.berg@intel.com>
Signed-off-by: John W. Linville <linville@tuxdriver.com>

1 files changed, 5 insertions, 4 deletions

diff --git a/drivers/net/wireless/b43/xmit.c b/drivers/net/wireless/b43/xmit.c
index b31ccc02fa21..136510edf3cf 100644
--- a/drivers/net/wireless/b43/xmit.c
+++ b/drivers/net/wireless/b43/xmit.c
@@ -663,7 +663,7 @@ void b43_rx(struct b43_wldev *dev, struct sk_buff *skb, const void *_rxhdr)
         u32 uninitialized_var(macstat);
         u16 chanid;
         u16 phytype;
-        int padding;
+        int padding, rate_idx;
 
         memset(&status, 0, sizeof(status));
 
@@ -766,16 +766,17 @@ void b43_rx(struct b43_wldev *dev, struct sk_buff *skb, const void *_rxhdr)
         }
 
         if (phystat0 & B43_RX_PHYST0_OFDM)
-                status.rate_idx = b43_plcp_get_bitrate_idx_ofdm(plcp,
+                rate_idx = b43_plcp_get_bitrate_idx_ofdm(plcp,
                                                 phytype == B43_PHYTYPE_A);
         else
-                status.rate_idx = b43_plcp_get_bitrate_idx_cck(plcp);
-        if (unlikely(status.rate_idx == -1)) {
+                rate_idx = b43_plcp_get_bitrate_idx_cck(plcp);
+        if (unlikely(rate_idx == -1)) {
                 /* PLCP seems to be corrupted.
                  * Drop the frame, if we are not interested in corrupted frames. */
                 if (!(dev->wl->filter_flags & FIF_PLCPFAIL))
                         goto drop;
         }
+        status.rate_idx = rate_idx;
         status.antenna = !!(phystat0 & B43_RX_PHYST0_ANT);
 
         /*