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USB: serial: cp210x: use kmemdup

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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>
This commit is contained in:
Muhammad Falak R Wani 2016-05-19 19:34:36 +05:30 committed by Johan Hovold
parent d8d841e833
commit d6c4dc3bf4
1 changed files with 1 additions and 3 deletions
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4
drivers/usb/serial/cp210x.c
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@ -496,12 +496,10 @@ static int cp210x_write_reg_block(struct usb_serial_port *port, u8 req,
void *dmabuf; void *dmabuf;
int result; int result;
dmabuf = kmalloc(bufsize, GFP_KERNEL); dmabuf = kmemdup(buf, bufsize, GFP_KERNEL);
if (!dmabuf) if (!dmabuf)
return -ENOMEM; return -ENOMEM;
memcpy(dmabuf, buf, bufsize);
result = usb_control_msg(serial->dev, usb_sndctrlpipe(serial->dev, 0), result = usb_control_msg(serial->dev, usb_sndctrlpipe(serial->dev, 0),
req, REQTYPE_HOST_TO_INTERFACE, 0, req, REQTYPE_HOST_TO_INTERFACE, 0,
port_priv->bInterfaceNumber, dmabuf, bufsize, port_priv->bInterfaceNumber, dmabuf, bufsize,