linux-kernel - Re: [PATCH] usb: xhci: Correct last context entry calculation for Configure Endpoint

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Message-ID: <20140328164235.GM17820@saruman.home>
Date:	Fri, 28 Mar 2014 11:42:35 -0500
From:	Felipe Balbi <balbi@...com>
To:	Julius Werner <jwerner@...omium.org>
CC:	Mathias Nyman <mathias.nyman@...el.com>,
	Sarah Sharp <sarah.a.sharp@...ux.intel.com>,
	Greg Kroah-Hartman <gregkh@...uxfoundation.org>,
	<linux-usb@...r.kernel.org>, <linux-kernel@...r.kernel.org>,
	Vincent Palatin <vpalatin@...omium.org>,
	Andrew Bresticker <abrestic@...omium.org>,
	Jim Lin <jilin@...dia.com>
Subject: Re: [PATCH] usb: xhci: Correct last context entry calculation for
 Configure Endpoint

Hi,

On Tue, Mar 25, 2014 at 11:42:43AM -0700, Julius Werner wrote:
> @@ -2723,8 +2697,19 @@ int xhci_check_bandwidth(struct usb_hcd *hcd, struct usb_device *udev)
>  			ctrl_ctx->drop_flags == 0)
>  		return 0;
>  
> -	xhci_dbg(xhci, "New Input Control Context:\n");
> +	/* Fix up Context Entries field. Minimum value is EP0 == BIT(1). */
>  	slot_ctx = xhci_get_slot_ctx(xhci, virt_dev->in_ctx);
> +	for (i = 31; i >= 1; i--) {
> +		u32 le32 = cpu_to_le32(BIT(i));

can you use __le32 instead of u32 here, just to make sure we can make
good use of sparse ?

-- 
balbi

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