[PATCH v2 4/6] USB: serial: cp210x: clean up set-chars request
From: Johan Hovold <johan@kernel.org>
Date: 2021-07-05 08:20:59
Also in:
lkml
Subsystem:
the rest, usb serial subsystem, usb subsystem · Maintainers:
Linus Torvalds, Johan Hovold, Greg Kroah-Hartman
Use the generic control request helper to implement the SET_CHARS request. Signed-off-by: Johan Hovold <johan@kernel.org> --- drivers/usb/serial/cp210x.c | 28 ++-------------------------- 1 file changed, 2 insertions(+), 26 deletions(-)
diff --git a/drivers/usb/serial/cp210x.c b/drivers/usb/serial/cp210x.c
index e560608afb1e..6e027e2a02ad 100644
--- a/drivers/usb/serial/cp210x.c
+++ b/drivers/usb/serial/cp210x.c@@ -1144,31 +1144,6 @@ static void cp210x_disable_event_mode(struct usb_serial_port *port) port_priv->event_mode = false; } -static int cp210x_set_chars(struct usb_serial_port *port, - struct cp210x_special_chars *chars) -{ - struct cp210x_port_private *port_priv = usb_get_serial_port_data(port); - struct usb_serial *serial = port->serial; - void *dmabuf; - int result; - - dmabuf = kmemdup(chars, sizeof(*chars), GFP_KERNEL); - if (!dmabuf) - return -ENOMEM; - - result = usb_control_msg(serial->dev, usb_sndctrlpipe(serial->dev, 0), - CP210X_SET_CHARS, REQTYPE_HOST_TO_INTERFACE, 0, - port_priv->bInterfaceNumber, - dmabuf, sizeof(*chars), USB_CTRL_SET_TIMEOUT); - - kfree(dmabuf); - - if (result < 0) - return result; - - return 0; -} - static bool cp210x_termios_change(const struct ktermios *a, const struct ktermios *b) { bool iflag_change, cc_change;
@@ -1216,7 +1191,8 @@ static void cp210x_set_flow_control(struct tty_struct *tty, chars.bXonChar = START_CHAR(tty); chars.bXoffChar = STOP_CHAR(tty); - ret = cp210x_set_chars(port, &chars); + ret = cp210x_write_reg_block(port, CP210X_SET_CHARS, &chars, + sizeof(chars)); if (ret) { dev_err(&port->dev, "failed to set special chars: %d\n", ret);
--
2.31.1