This question already has an answer here:
On all my pages, I have the logo in the top left corner. As is consistent with most sites online, it links back to the homepage.
However, I need to decide between one of two things:
Have the link apply on the homepage which links to the homepage (itself). This could cause redirection to the page they are on - which is unnecessary, but it would be more consistent.
Don't link the icon back to the home page on the home page. This would avoid unnecessary redirection, but causes consistency issues.
Each is as easy to implement as the other.