linux-kernel - Re: [PATCH v2 1/7] usb: gadget: pch_udc: Replace cpu_to_le32() by lower_32

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Date:   Thu, 25 Mar 2021 10:20:19 +0100
From:   Linus Walleij <linus.walleij@...aro.org>
To:     Andy Shevchenko <andriy.shevchenko@...ux.intel.com>
Cc:     linux-usb <linux-usb@...r.kernel.org>,
        "linux-kernel@...r.kernel.org" <linux-kernel@...r.kernel.org>,
        Felipe Balbi <balbi@...nel.org>,
        Greg Kroah-Hartman <gregkh@...uxfoundation.org>
Subject: Re: [PATCH v2 1/7] usb: gadget: pch_udc: Replace cpu_to_le32() by lower_32_bits()

On Tue, Mar 23, 2021 at 4:36 PM Andy Shevchenko
<andriy.shevchenko@...ux.intel.com> wrote:

> Either way ~0 will be in the correct byte order, hence
> replace cpu_to_le32() by lower_32_bits(). Moreover,
> it makes sparse happy, otherwise it complains:
>
> .../pch_udc.c:1813:27: warning: incorrect type in assignment (different base types)
> .../pch_udc.c:1813:27:    expected unsigned int [usertype] dataptr
> .../pch_udc.c:1813:27:    got restricted __le32 [usertype]
>
> Fixes: f646cf94520e ("USB device driver of Topcliff PCH")
> Signed-off-by: Andy Shevchenko <andriy.shevchenko@...ux.intel.com>

Nice fix! Also easier to understand.
Reviewed-by: Linus Walleij <linus.walleij@...aro.org>

Yours,
Linus Walleij