Marek Szyprowski wrote:
> On Friday, June 29, 2012 1:10 PM Clemens Ladisch wrote:
>> Marek Szyprowski wrote:
>>> +++ b/drivers/base/dma-mapping.c
>>> ...
>>> +int dma_common_mmap(struct device *dev, struct vm_area_struct *vma,
>>> + void *cpu_addr, dma_addr_t dma_addr, size_t size)
>>> +{
>>> + int ret = -ENXIO;
>>> + ...
>>> + if (dma_mmap_from_coherent(dev, vma, cpu_addr, size, &ret))
>>> + return ret;
>>
>> This will return -ENXIO if dma_mmap_from_coherent() succeeds.
>
> Thanks for spotting this!
Sorry, I was wrong; ret is actually set by dma_mmap_from_coherent's
output parameter. (That function's documentation appears to be
incomplete.)
Regards,
Clemens
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