Re: [PATCH 1/2] mlx4: allow device removal by fixing dma unmap size

From: David Miller
Date: Mon Feb 06 2012 - 14:43:06 EST

From: Thadeu Lima de Souza Cascardo <cascardo@xxxxxxxxxxxxxxxxxx>
Date: Mon, 6 Feb 2012 16:39:49 -0200

> After opening the network interface, Mellanox ConnectX device cannot be
> removed by hotplug because it has not properly unmapped all DMA memory.
> It happens that mlx4_en_activate_rx_rings overrides the variable that
> keeps the size of the memory mapped.
> This is fixed by passing to mlx4_en_destroy_rx_ring the same size that is
> given to mlx4_en_create_rx_ring.
> After applying this patch, hot unplugging the device works after opening
> the interface.
> Signed-off-by: Thadeu Lima de Souza Cascardo <cascardo@xxxxxxxxxxxxxxxxxx>

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