usb: gadget: u_serial: use %*ph to print small buffer

Use %*ph format to print small buffer as hex string.

Signed-off-by: Andy Shevchenko <andriy.shevchenko@linux.intel.com>
Link: https://lore.kernel.org/r/20201228200203.58525-1-andriy.shevchenko@linux.intel.com
Signed-off-by: Greg Kroah-Hartman <gregkh@linuxfoundation.org>

diff --git a/drivers/usb/gadget/function/u_serial.c b/drivers/usb/gadget/function/u_serial.c
index 2caccbb..768f883 100644 (file)
--- a/drivers/usb/gadget/function/u_serial.c
+++ b/drivers/usb/gadget/function/u_serial.c
@@ -258,9 +258,7 @@ __acquires(&port->port_lock)
                list_del(&req->list);
                req->zero = kfifo_is_empty(&port->port_write_buf);
 
-               pr_vdebug("ttyGS%d: tx len=%d, 0x%02x 0x%02x 0x%02x ...\n",
-                         port->port_num, len, *((u8 *)req->buf),
-                         *((u8 *)req->buf+1), *((u8 *)req->buf+2));
+               pr_vdebug("ttyGS%d: tx len=%d, %3ph ...\n", port->port_num, len, req->buf);
 
                /* Drop lock while we call out of driver; completions
                 * could be issued while we do so.  Disconnection may