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SubjectRe: [PATCH v2 0/3] usb: gadget: functionfs: DMABUF import interface
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Hi Paul,

W dniu 22.03.2023 o 10:21, Paul Cercueil pisze:
> Hi,
>
> This small patchset adds three new IOCTLs that can be used to attach,
> detach, or transfer from/to a DMABUF object.
>
> Changes since v1:
> - patch [2/3] is new. I had to reuse a piece of code that was already
> duplicated in the driver, so I factorized the code.
> - Make ffs_dma_resv_lock() static
> - Add MODULE_IMPORT_NS(DMA_BUF);
> - The attach/detach functions are now performed without locking the
> eps_lock spinlock. The transfer function starts with the spinlock
> unlocked, then locks it before allocating and queueing the USB
> transfer.
>

Can you share an example use case for these new features?
Is there a userspace that excercises the new ioctls?

Regards,

Andrzej

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