[PATCH 06/13 resend] dw_dmac: Change value of DWC_MAX_COUNT to 4095.

From: Viresh Kumar
Date: Fri Mar 04 2011 - 05:13:19 EST


Every descriptor can transfer a maximum count of 4095 (12 bits, in control reg),
So we must have DWC_MAX_COUNT as 4095 instead of 2048.

Signed-off-by: Viresh Kumar <viresh.kumar@xxxxxx>
---
drivers/dma/dw_dmac.c | 5 ++---
1 files changed, 2 insertions(+), 3 deletions(-)

diff --git a/drivers/dma/dw_dmac.c b/drivers/dma/dw_dmac.c
index e5d97bf..711ebe9 100644
--- a/drivers/dma/dw_dmac.c
+++ b/drivers/dma/dw_dmac.c
@@ -47,14 +47,13 @@

/*
* This is configuration-dependent and usually a funny size like 4095.
- * Let's round it down to the nearest power of two.
*
* Note that this is a transfer count, i.e. if we transfer 32-bit
- * words, we can do 8192 bytes per descriptor.
+ * words, we can do 16380 bytes per descriptor.
*
* This parameter is also system-specific.
*/
-#define DWC_MAX_COUNT 2048U
+#define DWC_MAX_COUNT 4095U

/*
* Number of descriptors to allocate for each channel. This should be
--
1.7.2.2

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