Re: [PATCH 1/2] dmaengine: mv_xor_v2: Fix an error code.

[Dan Carpenter]

A bunch of false positives could be silenced by changing the assign
and return hooks to check for unsigned types:

static void match_assign(struct expression *expr)
{
        if (expr_unsigned(expr->left))
                return;
        warn_on_positive_error(expr->right);
}

static void match_return(struct expression *expr)
{
        struct symbol *type;

        type = cur_func_return_type();
        if (type_unsigned(type))
                return;

        warn_on_positive_error(expr);
}

regards,
dan carpenter