lkml.org 
[lkml]   [2019]   [Oct]   [16]   [last100]   RSS Feed
Views: [wrap][no wrap]   [headers]  [forward] 
 
Messages in this thread
/
Date
From
SubjectRe: [PATCH] usb: renesas_usbhs: fix __le16 warnings
On Tue, Oct 15, 2019 at 04:50:44PM +0100, Ben Dooks (Codethink) 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.
>
> Signed-off-by: Ben Dooks <ben.dooks@codethink.co.uk>
> ---
> Cc: Greg Kroah-Hartman <gregkh@linuxfoundation.org>
> Cc: Yoshihiro Shimoda <yoshihiro.shimoda.uh@renesas.com>
> Cc: Simon Horman <horms+renesas@verge.net.au>
> Cc: Geert Uytterhoeven <geert+renesas@glider.be>
> Cc: linux-usb@vger.kernel.org
> Cc: linux-kernel@vger.kernel.org
> ---
> drivers/usb/renesas_usbhs/common.c | 12 ++++++------
> 1 file changed, 6 insertions(+), 6 deletions(-)
>
> diff --git a/drivers/usb/renesas_usbhs/common.c b/drivers/usb/renesas_usbhs/common.c
> index 4c3de777ef6c..a3c30b609433 100644
> --- a/drivers/usb/renesas_usbhs/common.c
> +++ b/drivers/usb/renesas_usbhs/common.c
> @@ -162,17 +162,17 @@ void usbhs_usbreq_get_val(struct usbhs_priv *priv, struct usb_ctrlrequest *req)
> req->bRequest = (val >> 8) & 0xFF;
> req->bRequestType = (val >> 0) & 0xFF;
>
> - req->wValue = usbhs_read(priv, USBVAL);
> - req->wIndex = usbhs_read(priv, USBINDX);
> - req->wLength = usbhs_read(priv, USBLENG);
> + req->wValue = cpu_to_le16(usbhs_read(priv, USBVAL));
> + req->wIndex = cpu_to_le16(usbhs_read(priv, USBINDX));
> + req->wLength = cpu_to_le16(usbhs_read(priv, USBLENG));

usbhs_read is backed by readl which performs
a le->cpu conversion. Rather than have a double conversion
perhaps it would be nicer to introduce usbhs_read_le.
Likewise for write.

> }
>
> void usbhs_usbreq_set_val(struct usbhs_priv *priv, struct usb_ctrlrequest *req)
> {
> usbhs_write(priv, USBREQ, (req->bRequest << 8) | req->bRequestType);
> - usbhs_write(priv, USBVAL, req->wValue);
> - usbhs_write(priv, USBINDX, req->wIndex);
> - usbhs_write(priv, USBLENG, req->wLength);
> + usbhs_write(priv, USBVAL, le16_to_cpu(req->wValue));
> + usbhs_write(priv, USBINDX, le16_to_cpu(req->wIndex));
> + usbhs_write(priv, USBLENG, le16_to_cpu(req->wLength));
>
> usbhs_bset(priv, DCPCTR, SUREQ, SUREQ);
> }
> --
> 2.23.0
>

\
 
 \ /
  Last update: 2019-10-16 14:27    [W:0.080 / U:9.808 seconds]
©2003-2020 Jasper Spaans|hosted at Digital Ocean and TransIP|Read the blog|Advertise on this site