From mboxrd@z Thu Jan  1 00:00:00 1970
From: David Miller <davem@davemloft.net>
Subject: Re: [PATCH v7 04/15] octeontx2-af: Add mailbox support infra
Date: Sat, 06 Oct 2018 14:42:49 -0700 (PDT)
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From: sunil.kovvuri@gmail.com
Date: Sat,  6 Oct 2018 11:36:22 +0530

> +	tx_hdr = (struct mbox_hdr *)(mdev->mbase  + mbox->tx_start);
> +	rx_hdr = (struct mbox_hdr *)(mdev->mbase  + mbox->rx_start);

Since mdev->mbase is a void pointer, you do not need these casts, nor
the parenthesis, at all.

Please remove them.