iRule redirect to mobile site

I think with your iRule, you'll wind up in an endless loop for mobile clients unless you add a URI check for the redirect page. And I'm assuming that if the user agent isn't for a mobile client, you want to redirect them to the page you mentioned... Maybe something like this would work

when HTTP_REQUEST {
    if { [string tolower [HTTP::host]] contains "www.mobilesite.com"}{
        switch -glob [string tolower [HTTP::header User-Agent]] {
            "*ipad*" -
            "*iphone*" -
            "*android*" -
            "*windows phone*" -
            "*windows ce*" -
            "*bada*" -
            "*bb10*" -
            "*blackberry*" -
            "*symbinos*" -
            "*symbain os*" -
            "*symbian*" -
            "*java*" -
            "*winowsphone*" -
            "*windowsce*" {
                if {not ([string tolower [HTTP::uri]] equals "/slm/faces/m/index.jspx")} {
                    HTTP::redirect "www.mobilesite.com/slm/faces/m/index.jspx"
                    return
                }
            }
            default {
                HTTP::redirect "https://mysite.com/OLA/faces/siteLocator.jspx"
            }
        }
    }
}