renegade-project/linux-next
2
0
Fork 0
mirror of https://github.com/edk2-porting/linux-next.git synced 2024-12-19 10:44:14 +08:00
Code

MIPS: lantiq: Do not enable IRQs in dma open

Browse Source 
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
Show Stats Download Patch File Download Diff File Expand all files Collapse all files

1
arch/mips/lantiq/xway/dma.c
View File

@ -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);

1
drivers/net/ethernet/lantiq_etop.c
View File

@ -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);