[patch] compat_ioctl: cleanup a type in do_i2c_rdwr_ioctl()

[Dan Carpenter <dan.carpenter@xxxxxxxxxx>]

We check that:

        if (nmsgs > I2C_RDRW_IOCTL_MAX_MSGS)
                return -EINVAL;

Since "nmsgs" is signed, it means the check can underflow.  It's
harmless, but messy.

Signed-off-by: Dan Carpenter <dan.carpenter@xxxxxxxxxx>

diff --git a/fs/compat_ioctl.c b/fs/compat_ioctl.c
index f505402..f4222a4 100644
--- a/fs/compat_ioctl.c
+++ b/fs/compat_ioctl.c
@@ -680,7 +680,8 @@ static int do_i2c_rdwr_ioctl(unsigned int fd, unsigned int cmd,
 	struct i2c_msg			__user *tmsgs;
 	struct i2c_msg32		__user *umsgs;
 	compat_caddr_t			datap;
-	int				nmsgs, i;
+	unsigned int			nmsgs;
+	int				i;
 
 	if (get_user(nmsgs, &udata->nmsgs))
 		return -EFAULT;
--
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