On 09/21/16 13:31, Arnd Bergmann wrote:
> On Wednesday, September 21, 2016 1:26:30 PM CEST Peter Ujfalusi wrote:
>> diff --git a/drivers/dma/edma.c b/drivers/dma/edma.c
>> index c2098a4b4dcf..4c8818278fcc 100644
>> --- a/drivers/dma/edma.c
>> +++ b/drivers/dma/edma.c
>> @@ -261,8 +261,11 @@ static const struct edmacc_param dummy_paramset = {
>> .ccnt = 1,
>> };
>>
>> -#define EDMA_BINDING_LEGACY 0
>> -#define EDMA_BINDING_TPCC 1
>> +enum edma_binding_type {
>> + EDMA_BINDING_LEGACY = 0,
>> + EDMA_BINDING_TPCC,
>> +};
>> +
>> static const struct of_device_id edma_of_ids[] = {
>> {
>> .compatible = "ti,edma3",
>> @@ -2184,7 +2187,8 @@ static int edma_probe(struct platform_device *pdev)
>> const struct of_device_id *match;
>>
>> match = of_match_node(edma_of_ids, node);
>> - if (match && (u32)match->data == EDMA_BINDING_TPCC)
>> + if (match &&
>> + (enum edma_binding_type)match->data == EDMA_BINDING_TPCC)
>> legacy_mode = false;
>>
>> info = edma_setup_info_from_dt(dev, legacy_mode);
>> --
>> 2.10.0
>>
>
> Are you sure this works on all architectures? IIRC the size of an enum
> is implementation defined, so this could still fail sometimes.
True, some arch have HW type for enum or something similar.
>
> I tend to use 'uintptr_t' for the cast instead.
What about keeping the defines and:
diff --git a/drivers/dma/edma.c b/drivers/dma/edma.c
index 3e9606b08340..493fdf30e8b8 100644
--- a/drivers/dma/edma.c
+++ b/drivers/dma/edma.c
@@ -263,14 +263,19 @@ static const struct edmacc_param dummy_paramset = {
#define EDMA_BINDING_LEGACY 0
#define EDMA_BINDING_TPCC 1
+static const u32 edma_binding_type[] = {
+ [EDMA_BINDING_LEGACY] = EDMA_BINDING_LEGACY,
+ [EDMA_BINDING_TPCC] = EDMA_BINDING_TPCC,
+};
+
static const struct of_device_id edma_of_ids[] = {
{
.compatible = "ti,edma3",
- .data = (void *)EDMA_BINDING_LEGACY,
+ .data = (void *)&edma_binding_type[EDMA_BINDING_LEGACY],
},
{
.compatible = "ti,edma3-tpcc",
- .data = (void *)EDMA_BINDING_TPCC,
+ .data = (void *)&edma_binding_type[EDMA_BINDING_TPCC],
},
{}
};
@@ -2183,7 +2188,7 @@ static int edma_probe(struct platform_device *pdev)
const struct of_device_id *match;
match = of_match_node(edma_of_ids, node);
- if (match && (u32)match->data == EDMA_BINDING_TPCC)
+ if (match && (*(u32*)match->data) == EDMA_BINDING_TPCC)
legacy_mode = false;
info = edma_setup_info_from_dt(dev, legacy_mode);
same for the ti-dma-crossbar.
--
Péter
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