netdev - Re: [PATCH net-next 1/5] net: mvneta: fix transmit path dma-unmapping on error

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Message-ID: <CANn89iLn4Q_Uw69zDPVCgQtcpUQH0Obaw1BQ9xFvRc60J=rmsQ@mail.gmail.com>
Date: Wed, 10 May 2023 13:33:45 +0200
From: Eric Dumazet <edumazet@...gle.com>
To: "Russell King (Oracle)" <rmk+kernel@...linux.org.uk>
Cc: Marek Behún <kabel@...nel.org>, 
	"David S. Miller" <davem@...emloft.net>, Jakub Kicinski <kuba@...nel.org>, netdev@...r.kernel.org, 
	Paolo Abeni <pabeni@...hat.com>, Thomas Petazzoni <thomas.petazzoni@...tlin.com>
Subject: Re: [PATCH net-next 1/5] net: mvneta: fix transmit path dma-unmapping
 on error

On Wed, May 10, 2023 at 12:15 PM Russell King (Oracle)
<rmk+kernel@...linux.org.uk> wrote:
>
> The transmit code assumes that the transmit descriptors that are used
> begin with the first descriptor in the ring, but this may not be the
> case. Fix this by providing a new function that dma-unmaps a range of
> numbered descriptor entries, and use that to do the unmapping.
>
> Signed-off-by: Russell King (Oracle) <rmk+kernel@...linux.org.uk>
> ---

Reviewed-by: Eric Dumazet <edumazet@...gle.com>