Q: Does mass storage gadget use DMA ?

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Hello,

I check code in:
https://elixir.free-electrons.com/linux/v3.3/source/drivers/usb/gadget/f_mass_storage.c
but I see no API usage of DMA, yet it is being mentioned as if it is used.
Is it that DMA used in this driver ? Why can't I find any DMA APIs inside?

Thank you,
Ran
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