On 06/09/13 20:13, Mark Jackson wrote:
> On 23/08/13 20:53, Joel Fernandes wrote:
>> HWMOD removal for MMC and Crypto is breaking edma_start as the events are
>> being manually triggered due to unused channel list not being clear. Atleast
>> breakage has been seen on these peripherals, but it is expected Audio (McASP)
>> maybe breaking too.
>>
>> This patch fixes the issue, by reading the "dmas" property from the DT node if
>> it exists and clearing the bits in the unused channel list so that these channels
>> are not manually triggered.
>>
>> v2 changes:
>> Reduced indendation by returning from if block.
>>
>> Reviewed-by: Sekhar Nori <nsekhar@xxxxxx>
>> Reported-by: Balaji T K <balajitk@xxxxxx>
>> Cc: Pantel Antoniou <panto@xxxxxxxxxxxxxxxxxxxxxxx>
>> Signed-off-by: Joel Fernandes <joelf@xxxxxx>
>> ---
>> Note:
>> Patch should go in for -rc cycle as it fixes existing crypto drivers.
>>
>> arch/arm/common/edma.c | 22 +++++++++++++++++++---
>> 1 file changed, 19 insertions(+), 3 deletions(-)
>>
>> diff --git a/arch/arm/common/edma.c b/arch/arm/common/edma.c
>> index 39ad030..3867e7e 100644
>> --- a/arch/arm/common/edma.c
>> +++ b/arch/arm/common/edma.c
>> @@ -560,14 +560,30 @@ static int reserve_contiguous_slots(int ctlr, unsigned int id,
>> static int prepare_unused_channel_list(struct device *dev, void *data)
>> {
>> struct platform_device *pdev = to_platform_device(dev);
>> - int i, ctlr;
>> + int i = 0, ctlr;
>> + u32 dma_chan;
>> + const __be32 *dma_chan_p;
>> + struct property *prop;
>> +
>> + if (dev->of_node) {
>> + of_property_for_each_u32(dev->of_node, "dmas", prop,
>> + dma_chan_p, dma_chan) {
>> + if (i++ & 1) {
>> + ctlr = EDMA_CTLR(dma_chan);
>> + clear_bit(EDMA_CHAN_SLOT(dma_chan),
>> + edma_cc[ctlr]->edma_unused);
>> + }
>> + }
>> + return;
>
> This should return something here, otherwise we get:-
>
> arch/arm/common/edma.c: In function 'prepare_unused_channel_list':
> arch/arm/common/edma.c:577:3: warning: 'return' with no value, in function returning non-void [-Wreturn-type]
Other than that I can confirm it fixes the issue for me ...
Tested-by: Mark Jackson <mpfj@xxxxxxxxxxxxx>
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