linux-kernel - Re: [PATCH 12/14] USB: oti6858: fix DMA buffer on stack

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Message-ID:  <20091228174619.3c5b2132@mycelium.queued.net>
Date:	Mon, 28 Dec 2009 17:46:19 -0500
From:	Andres Salomon <dilinger@...ued.net>
To:	linux-kernel@...r.kernel.org
Cc:	linux-usb@...r.kernel.org
Subject:  Re: [PATCH 12/14] USB: oti6858: fix DMA buffer on stack

On Mon, 28 Dec 2009 23:01:56 +0100
Johan Hovold <jhovold@...il.com> wrote:

[...]
> diff --git a/drivers/usb/serial/oti6858.c
> b/drivers/usb/serial/oti6858.c index c644e26..2ae97e7 100644
> --- a/drivers/usb/serial/oti6858.c
> +++ b/drivers/usb/serial/oti6858.c
> @@ -302,7 +302,7 @@ void send_data(struct work_struct *work)
>  	struct usb_serial_port *port = priv->port;
>  	int count = 0, result;
>  	unsigned long flags;
> -	unsigned char allow;
> +	u8 *allow;
>  
>  	dbg("%s(port = %d)", __func__, port->number);
>  

Erm, am I missing something here?  You're removing a 1 byte
stack variable and replacing it with a 4 byte (pointer) stack
variable?  What's the point of that, exactly?



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