1 files changed, 12 insertions, 0 deletions

diff --git a/drivers/net/wireless/rt2x00/rt2500usb.c b/drivers/net/wireless/rt2x00/rt2500usb.c
index 449c8d393484..3078417b326b 100644
--- a/drivers/net/wireless/rt2x00/rt2500usb.c
+++ b/drivers/net/wireless/rt2x00/rt2500usb.c
@@ -1121,6 +1121,7 @@ static void rt2500usb_write_beacon(struct queue_entry *entry)
         int pipe = usb_sndbulkpipe(usb_dev, 1);
         int length;
         u16 reg;
+        u32 word, len;
 
         /*
          * Add the descriptor in front of the skb.
@@ -1130,6 +1131,17 @@ static void rt2500usb_write_beacon(struct queue_entry *entry)
         skbdesc->desc = entry->skb->data;
 
         /*
+         * Adjust the beacon databyte count. The current number is
+         * calculated before this function gets called, but falsely
+         * assumes that the descriptor was already present in the SKB.
+         */
+        rt2x00_desc_read(skbdesc->desc, 0, &word);
+        len  = rt2x00_get_field32(word, TXD_W0_DATABYTE_COUNT);
+        len += skbdesc->desc_len;
+        rt2x00_set_field32(&word, TXD_W0_DATABYTE_COUNT, len);
+        rt2x00_desc_write(skbdesc->desc, 0, word);
+
+        /*
          * Disable beaconing while we are reloading the beacon data,
          * otherwise we might be sending out invalid data.
          */