From: Hauke Mehrtens Date: Sun, 9 Sep 2018 20:16:42 +0000 (+0200) Subject: MIPS: lantiq: Do not enable IRQs in dma open X-Git-Tag: v5.15~7641^2~385^2~5 X-Git-Url: http://review.tizen.org/git/?a=commitdiff_plain;h=cc973aecf0b0541918c5ecabe6c90d1f709b5f89;p=platform%2Fkernel%2Flinux-starfive.git 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: Hauke Mehrtens Acked-by: Paul Burton Signed-off-by: David S. Miller --- diff --git a/arch/mips/lantiq/xway/dma.c b/arch/mips/lantiq/xway/dma.c index 664f2f7..982859f 100644 --- a/arch/mips/lantiq/xway/dma.c +++ b/arch/mips/lantiq/xway/dma.c @@ -106,7 +106,6 @@ ltq_dma_open(struct ltq_dma_channel *ch) spin_lock_irqsave(<q_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(<q_dma_lock, flag); } EXPORT_SYMBOL_GPL(ltq_dma_open); diff --git a/drivers/net/ethernet/lantiq_etop.c b/drivers/net/ethernet/lantiq_etop.c index 5a7af52..32ac904 100644 --- a/drivers/net/ethernet/lantiq_etop.c +++ b/drivers/net/ethernet/lantiq_etop.c @@ -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);