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Commit 8bc4f556 authored by Laxman Dewangan's avatar Laxman Dewangan Committed by Olof Johansson
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ARM: tegra: dma: not required to move requestor when stopping. 



It is not require to move the requestor of dma to INVALID
option before stopping dma.

Signed-off-by: default avatarLaxman Dewangan <ldewangan@nvidia.com>
Acked-by: default avatarStephen Warren <swarren@nvidia.com>
Tested-by: default avatarStephen Warren <swarren@nvidia.com>
Signed-off-by: default avatarOlof Johansson <olof@lixom.net>
parent 76c2f6e5

arch/arm/mach-tegra/dma.c

+0 −8
Original line number Diff line number Diff line
@@ -52,8 +52,6 @@ 
#define CSR_ONCE				(1<<27)

#define CSR_FLOW				(1<<21)

#define CSR_REQ_SEL_SHIFT			16

#define CSR_REQ_SEL_MASK			(0x1F<<CSR_REQ_SEL_SHIFT)

#define CSR_REQ_SEL_INVALID			(31<<CSR_REQ_SEL_SHIFT)

#define CSR_WCOUNT_SHIFT			2

#define CSR_WCOUNT_MASK				0xFFFC
@@ -183,18 +181,12 @@ static void tegra_dma_stop(struct tegra_dma_channel *ch) 


static int tegra_dma_cancel(struct tegra_dma_channel *ch)

{

	u32 csr;

	unsigned long irq_flags;



	spin_lock_irqsave(&ch->lock, irq_flags);

	while (!list_empty(&ch->list))

		list_del(ch->list.next);



	csr = readl(ch->addr + APB_DMA_CHAN_CSR);

	csr &= ~CSR_REQ_SEL_MASK;

	csr |= CSR_REQ_SEL_INVALID;

	writel(csr, ch->addr + APB_DMA_CHAN_CSR);



	tegra_dma_stop(ch);



	spin_unlock_irqrestore(&ch->lock, irq_flags);