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: Laxman Dewangan <ldewangan@nvidia.com>
Acked-by: Stephen Warren <swarren@nvidia.com>
Tested-by: Stephen Warren <swarren@nvidia.com>
Signed-off-by: Olof Johansson <olof@lixom.net>

diff --git a/arch/arm/mach-tegra/dma.c b/arch/arm/mach-tegra/dma.c
index 998c55ddca421844da3cb64829155a330fb8974c..abea4f6e2dd5cbc47aeb3a516fea05d27afe08d4 100644 (file)
--- a/arch/arm/mach-tegra/dma.c
+++ b/arch/arm/mach-tegra/dma.c
@@ -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);