staging: comedi: make some variables unsigned in comedi_write()

In `comedi_write()`, the `n` and `m` variables are of type `int`.
Change them to `unsigned int` as they are used to measure a positive
number of bytes.  The `count` variable is also of type `int` and holds
the returned number of bytes written.  Change it to type `ssize_t` to
match the function's return type.

Signed-off-by: Ian Abbott <abbotti@mev.co.uk>
Reviewed-by: H Hartley Sweeten <hsweeten@visionengravers.com>
Signed-off-by: Greg Kroah-Hartman <gregkh@linuxfoundation.org>

diff --git a/drivers/staging/comedi/comedi_fops.c b/drivers/staging/comedi/comedi_fops.c
index 94c23484284fa9516f21da601985c034d42d7f41..188a12a02ce731caf0de8e575f589a13e2b0817d 100644 (file)
--- a/drivers/staging/comedi/comedi_fops.c
+++ b/drivers/staging/comedi/comedi_fops.c
@@ -2303,7 +2303,9 @@ static ssize_t comedi_write(struct file *file, const char __user *buf,
 {
        struct comedi_subdevice *s;
        struct comedi_async *async;
-       int n, m, count = 0, retval = 0;
+       unsigned int n, m;
+       ssize_t count = 0;
+       int retval = 0;
        DECLARE_WAITQUEUE(wait, current);
        struct comedi_file *cfp = file->private_data;
        struct comedi_device *dev = cfp->dev;