linux-kernel - Re: [PATCH 1/1] [usb/host]: use get/put_unaligned_* helpers to fix more potential unaligned issues.

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Date:	Thu, 15 May 2008 08:37:28 -0700
From:	Harvey Harrison <harvey.harrison@...il.com>
To:	Bryan Wu <cooloney@...nel.org>
Cc:	david-b@...bell.net, greg@...ah.com, linux-usb@...r.kernel.org,
	linux-kernel@...r.kernel.org, Jie Zhang <jie.zhang@...log.com>
Subject: Re: [PATCH 1/1] [usb/host]: use get/put_unaligned_* helpers to fix
	more potential unaligned issues.

On Thu, 2008-05-15 at 14:19 +0800, Bryan Wu wrote:
> Cc: Harvey Harrison <harvey.harrison@...il.com>

Looks fine.

Reviewed-by: Harvey Harrison <harvey.harrison@...il.com>

> Signed-off-by: Jie Zhang <jie.zhang@...log.com>
> Signed-off-by: Bryan Wu <cooloney@...nel.org>
> ---
>  drivers/usb/host/isp116x-hcd.c |    4 ++--
>  drivers/usb/host/uhci-hub.c    |    6 +++---
>  2 files changed, 5 insertions(+), 5 deletions(-)
> 
> diff --git a/drivers/usb/host/isp116x-hcd.c b/drivers/usb/host/isp116x-hcd.c
> index 20b9a0d..97ac6ff 100644
> --- a/drivers/usb/host/isp116x-hcd.c
> +++ b/drivers/usb/host/isp116x-hcd.c
> @@ -1024,7 +1024,7 @@ static int isp116x_hub_control(struct usb_hcd *hcd,
>  		break;
>  	case GetHubStatus:
>  		DBG("GetHubStatus\n");
> -		*(__le32 *) buf = 0;
> +		put_unaligned_le32(0, buf);
>  		break;
>  	case GetPortStatus:
>  		DBG("GetPortStatus\n");
> @@ -1033,7 +1033,7 @@ static int isp116x_hub_control(struct usb_hcd *hcd,
>  		spin_lock_irqsave(&isp116x->lock, flags);
>  		tmp = isp116x_read_reg32(isp116x, (--wIndex) ? HCRHPORT2 : HCRHPORT1);
>  		spin_unlock_irqrestore(&isp116x->lock, flags);
> -		*(__le32 *) buf = cpu_to_le32(tmp);
> +		put_unaligned_le32(tmp, buf);
>  		DBG("GetPortStatus: port[%d]  %08x\n", wIndex + 1, tmp);
>  		break;
>  	case ClearPortFeature:
> diff --git a/drivers/usb/host/uhci-hub.c b/drivers/usb/host/uhci-hub.c
> index 8e4427a..801fa99 100644
> --- a/drivers/usb/host/uhci-hub.c
> +++ b/drivers/usb/host/uhci-hub.c
> @@ -253,7 +253,7 @@ static int uhci_hub_control(struct usb_hcd *hcd, u16 typeReq, u16 wValue,
>  	switch (typeReq) {
>  
>  	case GetHubStatus:
> -		*(__le32 *)buf = cpu_to_le32(0);
> +		put_unaligned_le32(0, buf);
>  		OK(4);		/* hub power */
>  	case GetPortStatus:
>  		if (port >= uhci->rh_numports)
> @@ -306,8 +306,8 @@ static int uhci_hub_control(struct usb_hcd *hcd, u16 typeReq, u16 wValue,
>  			dev_dbg(uhci_dev(uhci), "port %d portsc %04x,%02x\n",
>  					wIndex, status, lstatus);
>  
> -		*(__le16 *)buf = cpu_to_le16(wPortStatus);
> -		*(__le16 *)(buf + 2) = cpu_to_le16(wPortChange);
> +		put_unaligned_le16(wPortStatus, buf);
> +		put_unaligned_le16(wPortChange, buf + 2);
>  		OK(4);
>  	case SetHubFeature:		/* We don't implement these */
>  	case ClearHubFeature:

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