Updating IPhone 4S to IOS 8.0.2 taking really long time?

I have the really old software on my Iphone 4s, it's probably like 6.1. IIm trying to update it to the newest one and it's taking a really long time. It's stuck on a white screen with the apple sign and a loading bar, the loading bar is almost at the end but not completely, there's less than a millimeter left and it's been that way for over an hour now, I also have no way of restarting it since my lock button is broken so I had to use touch assist to do everything. Is this normal? How long does it usually take?

Just wait or try restarting

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