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Commit cc973aec authored by Hauke Mehrtens's avatar Hauke Mehrtens Committed by David S. Miller
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MIPS: lantiq: Do not enable IRQs in dma open 



When a DMA channel is opened the IRQ should not get activated
automatically, this allows it to pull data out manually without the help
of interrupts. This is needed for a workaround in the vrx200 Ethernet
driver.

Signed-off-by: default avatarHauke Mehrtens <hauke@hauke-m.de>
Acked-by: default avatarPaul Burton <paul.burton@mips.com>
Signed-off-by: default avatarDavid S. Miller <davem@davemloft.net>
parent aaf92530

arch/mips/lantiq/xway/dma.c

+0 −1
Original line number Diff line number Diff line
@@ -106,7 +106,6 @@ ltq_dma_open(struct ltq_dma_channel *ch) 
	spin_lock_irqsave(&ltq_dma_lock, flag);

	ltq_dma_w32(ch->nr, LTQ_DMA_CS);

	ltq_dma_w32_mask(0, DMA_CHAN_ON, LTQ_DMA_CCTRL);

	ltq_dma_w32_mask(0, 1 << ch->nr, LTQ_DMA_IRNEN);

	spin_unlock_irqrestore(&ltq_dma_lock, flag);

}

EXPORT_SYMBOL_GPL(ltq_dma_open);

drivers/net/ethernet/lantiq_etop.c

+1 −0
Original line number Diff line number Diff line
@@ -432,6 +432,7 @@ ltq_etop_open(struct net_device *dev) 
		if (!IS_TX(i) && (!IS_RX(i)))

			continue;

		ltq_dma_open(&ch->dma);

		ltq_dma_enable_irq(&ch->dma);

		napi_enable(&ch->napi);

	}

	phy_start(dev->phydev);