USB: serial: cp210x: use kmemdup

Use kmemdup when some other buffer is immediately copied into allocated
region. It replaces call to allocation followed by memcpy, by a single
call to kmemdup.

Signed-off-by: Muhammad Falak R Wani <falakreyaz@gmail.com>
Signed-off-by: Johan Hovold <johan@kernel.org>

1 files changed, 1 insertions, 3 deletions

diff --git a/drivers/usb/serial/cp210x.c b/drivers/usb/serial/cp210x.c
index 96a70789b4c2..4d6a5c672a3d 100644
--- a/drivers/usb/serial/cp210x.c
+++ b/drivers/usb/serial/cp210x.c
@@ -496,12 +496,10 @@ static int cp210x_write_reg_block(struct usb_serial_port *port, u8 req,
         void *dmabuf;
         int result;
 
-        dmabuf = kmalloc(bufsize, GFP_KERNEL);
+        dmabuf = kmemdup(buf, bufsize, GFP_KERNEL);
         if (!dmabuf)
                 return -ENOMEM;
 
-        memcpy(dmabuf, buf, bufsize);
-
         result = usb_control_msg(serial->dev, usb_sndctrlpipe(serial->dev, 0),
                         req, REQTYPE_HOST_TO_INTERFACE, 0,
                         port_priv->bInterfaceNumber, dmabuf, bufsize,