netdev - Re: [PATCH 2/2] mlx4: fix DMA mapping leak when allocation fails

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Message-Id: <20120206.144256.1171908949073473140.davem@davemloft.net>
Date:	Mon, 06 Feb 2012 14:42:56 -0500 (EST)
From:	David Miller <davem@...emloft.net>
To:	cascardo@...ux.vnet.ibm.com
Cc:	yevgenyp@...lanox.co.il, ogerlitz@...lanox.com,
	eugenia@...lanox.co.il, alexg@...lanox.com, netdev@...r.kernel.org,
	linux-kernel@...r.kernel.org
Subject: Re: [PATCH 2/2] mlx4: fix DMA mapping leak when allocation fails

From: Thadeu Lima de Souza Cascardo <cascardo@...ux.vnet.ibm.com>
Date: Mon,  6 Feb 2012 16:39:50 -0200

> mlx4_en_prepare_rx_desc does not correctly clean up after it finds an
> allocation failure. It should unmap a page before calling put_page, but
> it only calls the later.
> 
> This bug would prevent a device removal using hotplug after setting the
> device MTU to 9000 and opening the network interface. After the fix, we
> still see the allocation failure with MTU 9000, but we are able to
> remove the device.
> 
> Signed-off-by: Thadeu Lima de Souza Cascardo <cascardo@...ux.vnet.ibm.com>

Applied.
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