tty: rpmsg: Assign returned id to a local variable

Instead of putting garbage in the data structure, assign allocated id
or an error code to a temporary variable. This makes code cleaner.

Signed-off-by: Andy Shevchenko <andriy.shevchenko@linux.intel.com>
Link: https://lore.kernel.org/r/20211025135148.53944-1-andriy.shevchenko@linux.intel.com
Signed-off-by: Greg Kroah-Hartman <gregkh@linuxfoundation.org>

diff --git a/drivers/tty/rpmsg_tty.c b/drivers/tty/rpmsg_tty.c
index 8130763..8c17ddb 100644 (file)
--- a/drivers/tty/rpmsg_tty.c
+++ b/drivers/tty/rpmsg_tty.c
@@ -121,15 +121,16 @@ static struct rpmsg_tty_port *rpmsg_tty_alloc_cport(void)
                return ERR_PTR(-ENOMEM);
 
        mutex_lock(&idr_lock);
-       cport->id = idr_alloc(&tty_idr, cport, 0, MAX_TTY_RPMSG, GFP_KERNEL);
+       err = idr_alloc(&tty_idr, cport, 0, MAX_TTY_RPMSG, GFP_KERNEL);
        mutex_unlock(&idr_lock);
 
-       if (cport->id < 0) {
-               err = cport->id;
+       if (err < 0) {
                kfree(cport);
                return ERR_PTR(err);
        }
 
+       cport->id = err;
+
        return cport;
 }