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SubjectRE: [PATCH] usb: renesas_usbhs: fix __le16 warnings
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Hi Simon-san,

> From: Simon Horman, Sent: Wednesday, October 16, 2019 9:27 PM
<snip>
> > 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.

I'm afraid but, I could not understand these comments.
At the moment, the usbhs_{read,write}() call io{read,write}16(),
not {read,write}l().

https://git.kernel.org/pub/scm/linux/kernel/git/torvalds/linux.git/tree/drivers/usb/renesas_usbhs/common.c?h=v5.4-rc3#n62

Best regards,
Yoshihiro Shimoda

>
> > }
> >
> > 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
> >

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