linux-kernel - Re: staging: comedi: usbduxsigma: Split a condition check in usbduxsigma_alloc_usb

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Message-ID: <79cd0aa8-f3d8-14c9-07eb-cb5231ebb83f@mev.co.uk>
Date:   Thu, 8 Dec 2016 18:12:53 +0000
From:   Ian Abbott <abbotti@....co.uk>
To:     SF Markus Elfring <elfring@...rs.sourceforge.net>
Cc:     devel@...verdev.osuosl.org, Chris Cesare <chris.cesare@...il.com>,
        Greg Kroah-Hartman <gregkh@...uxfoundation.org>,
        H Hartley Sweeten <hsweeten@...ionengravers.com>,
        LKML <linux-kernel@...r.kernel.org>,
        kernel-janitors@...r.kernel.org
Subject: Re: staging: comedi: usbduxsigma: Split a condition check in
 usbduxsigma_alloc_usb_buffers()

On 08/12/16 15:46, SF Markus Elfring wrote:
>>> * Reduce memory allocation sizes for two function calls.
>
> Is this implementation detail worth for further considerations?

I assume you are referring to the allocation of devpriv->ai_urbs and 
devpriv->ao_urbs?  Your patch does not reduce their sizes; `urb` and 
`*devpriv->ai_urbs` have the same type `struct urb *`.  Having said 
that, `sizeof(*devpriv->ai_urbs)` is cleaner code than `sizeof(urb)` in 
this case.

-- 
-=( Ian Abbott @ MEV Ltd.    E-mail: <abbotti@....co.uk> )=-
-=(                          Web: http://www.mev.co.uk/  )=-