Handle tty->ops->write() returning error

[elmcan.git] / module / elmcan.c

diff --git a/module/elmcan.c b/module/elmcan.c
index e4552024d3ae3015657133f74fc87e0fba5eefe7..cde48caaf330062c3859828594ebc522ed62e55f 100644 (file)
--- a/module/elmcan.c
+++ b/module/elmcan.c
@@ -137,6 +137,8 @@ struct elmcan {
 static DEFINE_SPINLOCK(elmcan_discdata_lock);
 
 
+static inline void elm327_panic(struct elmcan *elm);
+
 
 
  /************************************************************************
@@ -161,6 +163,11 @@ static void elm327_send(struct elmcan *elm, const void *buf, size_t len)
         */
        set_bit(TTY_DO_WRITE_WAKEUP, &elm->tty->flags);
        actual = elm->tty->ops->write(elm->tty, elm->txbuf, len);
+       if (actual < 0) {
+               pr_err("Failed to write to tty for %s.\n", elm->dev->name);
+               elm327_panic(elm);
+       }
+
        elm->txleft = len - actual;
        elm->txhead = elm->txbuf + actual;
 }