1 files changed, 3 insertions, 5 deletions

diff --git a/include/linux/n_r3964.h b/include/linux/n_r3964.h
index 5d0b2a1dee69..90a803aa42e8 100644
--- a/include/linux/n_r3964.h
+++ b/include/linux/n_r3964.h
@@ -152,9 +152,6 @@ struct r3964_info {
         unsigned char *rx_buf;            /* ring buffer */
         unsigned char *tx_buf;
 
-        wait_queue_head_t read_wait;
-        //struct wait_queue *read_wait;
-
         struct r3964_block_header *rx_first;
         struct r3964_block_header *rx_last;
         struct r3964_block_header *tx_first;
@@ -164,8 +161,9 @@ struct r3964_info {
         unsigned char last_rx;
         unsigned char bcc;
         unsigned int  blocks_in_rx_queue;
-          
-        
+
+        struct mutex read_lock;         /* serialize r3964_read */
+
         struct r3964_client_info *firstClient;
         unsigned int state;
         unsigned int flags;