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    SubjectRe: [PATCH/RFC 5/5] usb: Add support for streams alloc/dealloc to devio.c
    Thanks Sarah, Hans for your comments,

    On Thu, August 18, 2011 3:47 pm, Sarah Sharp wrote:

    > Yes, I think this is the correct solution. Sorry for taking so long to
    > get back to you.

    OK, so I will go ahead with implementing this solution.

    > On Wed, Aug 17, 2011 at 09:06:03AM +0200, Hans Petter Selasky wrote:
    >> I would suggest overloading the "unsigned int pipe", instead of breaking
    >> existing API's by adding a new stream ID value. Also for LibUSB.

    The purposed solution will not break any existing API, by doing the
    a. Adding a new API for streams alloc/dealloc
    b. Adding a new API for submitting a URB which is stream capable (I will
    implement this in a separate patch).

    > I don't see this as a strong argument why we should arbitrarily limit a
    > new API. It's very hard to deprecate kernel to userspace API, so I
    > think we should do it right the first time. There are current
    > applications (like an SSD behind a UAS device) that need as many
    > concurrent streams in flight as possible, so I don't buy the argument
    > that there aren't current applications that need that many streams.

    I agree with Sarah.
    Hans, I appreciate your inputs. Please let me know if you see a good
    reason why not implementing the new APIs purposed above for streams
    allocation and usage. Otherwise I will go ahead with the implementation.


    Sent by an employee of the Qualcomm Innovation Center, Inc.
    The Qualcomm Innovation Center, Inc. is a member of the Code Aurora Forum.

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