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References: <20191015155044.11858-1-ben.dooks@codethink.co.uk>
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From:   Geert Uytterhoeven <geert@linux-m68k.org>
Date:   Tue, 15 Oct 2019 18:45:13 +0200
Message-ID: <CAMuHMdXkdNCyNQyWEPEzTYScwqTfv9z_RzFcJDy7VySeiZEmdw@mail.gmail.com>
Subject: Re: [PATCH] usb: renesas_usbhs: fix __le16 warnings
To:     "Ben Dooks (Codethink)" <ben.dooks@codethink.co.uk>
Cc:     linux-kernel@lists.codethink.co.uk,
        Greg Kroah-Hartman <gregkh@linuxfoundation.org>,
        Yoshihiro Shimoda <yoshihiro.shimoda.uh@renesas.com>,
        Simon Horman <horms+renesas@verge.net.au>,
        Geert Uytterhoeven <geert+renesas@glider.be>,
        USB list <linux-usb@vger.kernel.org>,
        Linux Kernel Mailing List <linux-kernel@vger.kernel.org>
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On Tue, Oct 15, 2019 at 5:50 PM Ben Dooks (Codethink)
<ben.dooks@codethink.co.uk> wrote:
> Fix the warnings generated by casting to/from __le16 without
> using the correct functions.
>
> Fixes the following sparse warnings:
>
> drivers/usb/renesas_usbhs/common.c:165:25: warning: incorrect type in assignment (different base types)
> drivers/usb/renesas_usbhs/common.c:165:25:    expected restricted __le16 [usertype] wValue
> drivers/usb/renesas_usbhs/common.c:165:25:    got unsigned short
> drivers/usb/renesas_usbhs/common.c:166:25: warning: incorrect type in assignment (different base types)
> drivers/usb/renesas_usbhs/common.c:166:25:    expected restricted __le16 [usertype] wIndex
> drivers/usb/renesas_usbhs/common.c:166:25:    got unsigned short
> drivers/usb/renesas_usbhs/common.c:167:25: warning: incorrect type in assignment (different base types)
> drivers/usb/renesas_usbhs/common.c:167:25:    expected restricted __le16 [usertype] wLength
> drivers/usb/renesas_usbhs/common.c:167:25:    got unsigned short
> drivers/usb/renesas_usbhs/common.c:173:39: warning: incorrect type in argument 3 (different base types)
> drivers/usb/renesas_usbhs/common.c:173:39:    expected unsigned short [usertype] data
> drivers/usb/renesas_usbhs/common.c:173:39:    got restricted __le16 [usertype] wValue
> drivers/usb/renesas_usbhs/common.c:174:39: warning: incorrect type in argument 3 (different base types)
> drivers/usb/renesas_usbhs/common.c:174:39:    expected unsigned short [usertype] data
> drivers/usb/renesas_usbhs/common.c:174:39:    got restricted __le16 [usertype] wIndex
> drivers/usb/renesas_usbhs/common.c:175:39: warning: incorrect type in argument 3 (different base types)
> drivers/usb/renesas_usbhs/common.c:175:39:    expected unsigned short [usertype] data
>
> Note. I belive this to be correct, and should be a no-op on arm.

Yep, the affected platforms are little-endian.

> Signed-off-by: Ben Dooks <ben.dooks@codethink.co.uk>

Reviewed-by: Geert Uytterhoeven <geert+renesas@glider.be>

Gr{oetje,eeting}s,

                        Geert

-- 
Geert Uytterhoeven -- There's lots of Linux beyond ia32 -- geert@linux-m68k.org

In personal conversations with technical people, I call myself a hacker. But
when I'm talking to journalists I just say "programmer" or something like that.
                                -- Linus Torvalds