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MIPS: lantiq: Do not enable IRQs in dma open

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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: Hauke Mehrtens <hauke@hauke-m.de>
Acked-by: Paul Burton <paul.burton@mips.com>
Signed-off-by: David S. Miller <davem@davemloft.net>
This commit is contained in:
Hauke Mehrtens
2018-09-09 22:16:42 +02:00
committed by David S. Miller
parent aaf9253025
commit cc973aecf0
2 changed files with 1 additions and 1 deletions
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arch/mips/lantiq/xway/dma.c
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@@ -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);