[PATCH] dmaengine: at_xdmac: fix for chan conf simplification

[nicolas.ferre@atmel.com (Nicolas Ferre)]

Le 12/02/2015 16:33, Nicolas Ferre a ?crit :
> Le 12/02/2015 16:30, Ludovic Desroches a ?crit :
>> When simplificating the channel configuration, the cyclic case has been
>> forgotten. It leads to use bad configuration causing many bugs.
>>
>> Signed-off-by: Ludovic Desroches <ludovic.desroches@atmel.com>
> 
> Oh, yes indeed, pretty important:
> Acked-by: Nicolas Ferre <nicolas.ferre@atmel.com>

Vinod,

Can we have this fix in 4.0 please?

Bye,


>> ---
>>  drivers/dma/at_xdmac.c | 7 +++----
>>  1 file changed, 3 insertions(+), 4 deletions(-)
>>
>> diff --git a/drivers/dma/at_xdmac.c b/drivers/dma/at_xdmac.c
>> index 710546d..895b8bd 100644
>> --- a/drivers/dma/at_xdmac.c
>> +++ b/drivers/dma/at_xdmac.c
>> @@ -664,7 +664,6 @@ at_xdmac_prep_dma_cyclic(struct dma_chan *chan, dma_addr_t buf_addr,
>>  	struct at_xdmac_desc	*first = NULL, *prev = NULL;
>>  	unsigned int		periods = buf_len / period_len;
>>  	int			i;
>> -	u32			cfg;
>>  
>>  	dev_dbg(chan2dev(chan), "%s: buf_addr=%pad, buf_len=%zd, period_len=%zd, dir=%s, flags=0x%lx\n",
>>  		__func__, &buf_addr, buf_len, period_len,
>> @@ -700,17 +699,17 @@ at_xdmac_prep_dma_cyclic(struct dma_chan *chan, dma_addr_t buf_addr,
>>  		if (direction == DMA_DEV_TO_MEM) {
>>  			desc->lld.mbr_sa = atchan->per_src_addr;
>>  			desc->lld.mbr_da = buf_addr + i * period_len;
>> -			cfg = atchan->cfg[AT_XDMAC_DEV_TO_MEM_CFG];
>> +			desc->lld.mbr_cfg = atchan->cfg[AT_XDMAC_DEV_TO_MEM_CFG];
>>  		} else {
>>  			desc->lld.mbr_sa = buf_addr + i * period_len;
>>  			desc->lld.mbr_da = atchan->per_dst_addr;
>> -			cfg = atchan->cfg[AT_XDMAC_MEM_TO_DEV_CFG];
>> +			desc->lld.mbr_cfg = atchan->cfg[AT_XDMAC_MEM_TO_DEV_CFG];
>>  		}
>>  		desc->lld.mbr_ubc = AT_XDMAC_MBR_UBC_NDV1
>>  			| AT_XDMAC_MBR_UBC_NDEN
>>  			| AT_XDMAC_MBR_UBC_NSEN
>>  			| AT_XDMAC_MBR_UBC_NDE
>> -			| period_len >> at_xdmac_get_dwidth(cfg);
>> +			| period_len >> at_xdmac_get_dwidth(desc->lld.mbr_cfg);
>>  
>>  		dev_dbg(chan2dev(chan),
>>  			 "%s: lld: mbr_sa=%pad, mbr_da=%pad, mbr_ubc=0x%08x\n",
>>
> 
> 


-- 
Nicolas Ferre