netdev - Re: [PATCH 2/3] net: ks8851-ml: Fix 16-bit data access

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Message-Id: <20200215.012458.724817187941650024.davem@davemloft.net>
Date:   Sat, 15 Feb 2020 01:24:58 -0800 (PST)
From:   David Miller <davem@...emloft.net>
To:     marex@...x.de
Cc:     netdev@...r.kernel.org, lukas@...ner.de, ynezz@...e.cz,
        yuehaibing@...wei.com
Subject: Re: [PATCH 2/3] net: ks8851-ml: Fix 16-bit data access

From: Marek Vasut <marex@...x.de>
Date: Mon, 10 Feb 2020 19:41:38 +0100

> @@ -197,7 +197,7 @@ static inline void ks_inblk(struct ks_net *ks, u16 *wptr, u32 len)
>  {
>  	len >>= 1;
>  	while (len--)
> -		*wptr++ = (u16)ioread16(ks->hw_addr);
> +		*wptr++ = swab16(ioread16(ks->hw_addr));

I agree with the other feedback, the endianness looks wrong here.

The ioread16() translates whatever is behind ks->hw_addr into cpu
endianness.

This is either always little endian (for example), which means that
unconditionally swapping this doesn't seem to make sense.