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>

1 files changed, 0 insertions, 8 deletions

diff --git a/arch/arm/mach-tegra/dma.c b/arch/arm/mach-tegra/dma.c
index 998c55ddca42..abea4f6e2dd5 100644
--- 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);