mv643xx_eth_start_xmit() should check mp->tx_desc_count only
inside the mp->lock spinlock.
Signed-off-by: NLennert Buytenhek <buytenh@marvell.com>
Reviewed-by: NTzachi Perelstein <tzachi@marvell.com>
Signed-off-by: NDale Farnsworth <dale@farnsworth.org>