serial: liteuart: Fix NULL pointer dereference in ->remove()

commit 0f55f89d98c8b3e12b4f55f71c127a173e29557c upstream.

drvdata has to be set in _probe() - otherwise platform_get_drvdata()
causes null pointer dereference BUG in _remove().

Fixes: 1da81e5562fa ("drivers/tty/serial: add LiteUART driver")
Cc: stable <stable@vger.kernel.org>
Reviewed-by: Johan Hovold <johan@kernel.org>
Signed-off-by: Ilia Sergachev <silia@ethz.ch>
Link: https://lore.kernel.org/r/20211115224944.23f8c12b@dtkw
Signed-off-by: Greg Kroah-Hartman <gregkh@linuxfoundation.org>

diff --git a/drivers/tty/serial/liteuart.c b/drivers/tty/serial/liteuart.c
index dbc0559a9157546c6377a433a7071d0b0dd74251..f075f4ff5fcfd7258078b8f41fa7c2ebc21a1860 100644 (file)
--- a/drivers/tty/serial/liteuart.c
+++ b/drivers/tty/serial/liteuart.c
@@ -285,6 +285,8 @@ static int liteuart_probe(struct platform_device *pdev)
        port->line = dev_id;
        spin_lock_init(&port->lock);
 
+       platform_set_drvdata(pdev, port);
+
        return uart_add_one_port(&liteuart_driver, &uart->port);
 }