linux-kernel - Re: [PATCH -next 24/26] usb: Use dma_zalloc

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Message-ID: <Pine.LNX.4.44L0.1406151801421.30784-100000@netrider.rowland.org>
Date:	Sun, 15 Jun 2014 18:02:23 -0400 (EDT)
From:	Alan Stern <stern@...land.harvard.edu>
To:	Joe Perches <joe@...ches.com>
cc:	linux-kernel@...r.kernel.org, Paul Zimmerman <paulz@...opsys.com>,
	Greg Kroah-Hartman <gregkh@...uxfoundation.org>,
	<linux-usb@...r.kernel.org>
Subject: Re: [PATCH -next 24/26] usb: Use dma_zalloc_coherent

On Sun, 15 Jun 2014, Joe Perches wrote:

> Use the zeroing function instead of dma_alloc_coherent & memset(,0,)
> 
> Signed-off-by: Joe Perches <joe@...ches.com>

...

> diff --git a/drivers/usb/host/uhci-hcd.c b/drivers/usb/host/uhci-hcd.c
> index 27f35e8..681fc5e 100644
> --- a/drivers/usb/host/uhci-hcd.c
> +++ b/drivers/usb/host/uhci-hcd.c
> @@ -589,15 +589,14 @@ static int uhci_start(struct usb_hcd *hcd)
>  	uhci->dentry = dentry;
>  #endif
>  
> -	uhci->frame = dma_alloc_coherent(uhci_dev(uhci),
> -			UHCI_NUMFRAMES * sizeof(*uhci->frame),
> -			&uhci->frame_dma_handle, 0);
> +	uhci->frame = dma_zalloc_coherent(uhci_dev(uhci),
> +					  UHCI_NUMFRAMES * sizeof(*uhci->frame),
> +					  &uhci->frame_dma_handle, 0);

Please don't change the coding style.  This file indents continuation  
lines by two tab stops; it doesn't align things with opening parens.

Alan Stern

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