linux-kernel - Re: [PATCH] net: can: add missing urb->transfer

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Date:   Sun, 25 Jul 2021 18:30:39 +0200
From:   Marc Kleine-Budde <mkl@...gutronix.de>
To:     Yasushi SHOJI <yasushi.shoji@...il.com>
Cc:     Pavel Skripkin <paskripkin@...il.com>, wg@...ndegger.com,
        linux-can@...r.kernel.org, linux-kernel@...r.kernel.org,
        netdev@...r.kernel.org, Yasushi SHOJI <yashi@...cecubics.com>
Subject: Re: [PATCH] net: can: add missing urb->transfer_dma initialization

On 25.07.2021 22:27:37, Yasushi SHOJI wrote:
> Hi Pavel,
> 
> I've tested this patch on top of v5.14-rc2.  All good.
> 
> Tested-by: Yasushi SHOJI <yashi@...cecubics.com>
> 
> Some nitpicks.
> 
> On Sun, Jul 25, 2021 at 7:36 PM Pavel Skripkin <paskripkin@...il.com> wrote:
> >
> > Yasushi reported, that his Microchip CAN Analyzer stopped working since
> > commit 91c02557174b ("can: mcba_usb: fix memory leak in mcba_usb").
> > The problem was in missing urb->transfer_dma initialization.
> >
> > In my previous patch to this driver I refactored mcba_usb_start() code to
> > avoid leaking usb coherent buffers. To achive it, I passed local stack
> 
> achieve
> 
> > variable to usb_alloc_coherent() and then saved it to private array to
> > correctly free all coherent buffers on ->close() call. But I forgot to
> > inialize urb->transfer_dma with variable passed to usb_alloc_coherent().
> 
> initialize

Fixed while applying.

Thanks,
Marc

-- 
Pengutronix e.K.                 | Marc Kleine-Budde           |
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