Messages in this thread | | | Date | Fri, 31 Mar 2023 11:40:58 +0200 | Subject | Re: [PATCH v2 0/3] usb: gadget: functionfs: DMABUF import interface | From | Andrzej Pietrasiewicz <> |
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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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