From 418e74070662e1ae7d9bb5202f773d35c9a7f05e Mon Sep 17 00:00:00 2001 From: Viresh Kumar Date: Fri, 4 Mar 2011 15:42:50 +0530 Subject: [PATCH] dw_dmac: Change value of DWC_MAX_COUNT to 4095. 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 Signed-off-by: Vinod Koul --- drivers/dma/dw_dmac.c | 5 ++--- 1 file changed, 2 insertions(+), 3 deletions(-) diff --git a/drivers/dma/dw_dmac.c b/drivers/dma/dw_dmac.c index e5d97bf9264a..711ebe954f5b 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 -- 2.20.1