1 files changed, 2 insertions, 0 deletions

diff --git a/drivers/char/rocket.c b/drivers/char/rocket.c
index 32fe8dca24b6..00cfb6c7fd46 100644
--- a/drivers/char/rocket.c
+++ b/drivers/char/rocket.c
@@ -1585,6 +1585,7 @@ static void rp_wait_until_sent(struct tty_struct *tty, int timeout)
                jiffies);
         printk(KERN_INFO "cps=%d...\n", info->cps);
 #endif
+        lock_kernel();
         while (1) {
                 txcnt = sGetTxCnt(cp);
                 if (!txcnt) {
@@ -1612,6 +1613,7 @@ static void rp_wait_until_sent(struct tty_struct *tty, int timeout)
                         break;
         }
         __set_current_state(TASK_RUNNING);
+        unlock_kernel();
 #ifdef ROCKET_DEBUG_WAIT_UNTIL_SENT
         printk(KERN_INFO "txcnt = %d (jiff=%lu)...done\n", txcnt, jiffies);
 #endif