netdev - Re: [PATCH v5 net] ravb: unmap descriptors when freeing rings

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Message-Id: <20170126.184203.1144356525122970431.davem@davemloft.net>
Date:   Thu, 26 Jan 2017 18:42:03 -0500 (EST)
From:   David Miller <davem@...emloft.net>
To:     horms+renesas@...ge.net.au
Cc:     sergei.shtylyov@...entembedded.com, magnus.damm@...il.com,
        netdev@...r.kernel.org, linux-renesas-soc@...r.kernel.org,
        kazuya.mizuguchi.ks@...esas.com
Subject: Re: [PATCH v5 net] ravb: unmap descriptors when freeing rings

From: Simon Horman <horms+renesas@...ge.net.au>
Date: Thu, 26 Jan 2017 14:29:27 +0100

> From: Kazuya Mizuguchi <kazuya.mizuguchi.ks@...esas.com>
> 
> "swiotlb buffer is full" errors occur after repeated initialisation of a
> device - f.e. suspend/resume or ip link set up/down. This is because memory
> mapped using dma_map_single() in ravb_ring_format() and ravb_start_xmit()
> is not released.  Resolve this problem by unmapping descriptors when
> freeing rings.
> 
> Fixes: c156633f1353 ("Renesas Ethernet AVB driver proper")
> Signed-off-by: Kazuya Mizuguchi <kazuya.mizuguchi.ks@...esas.com>
> [simon: reworked]
> Signed-off-by: Simon Horman <horms+renesas@...ge.net.au>

Applied, thanks Simon.