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SubjectRe: [PATCH v1 0/4] support USB offload feature
On 04/03/2022 16:27, Randy Dunlap wrote:
> On 3/3/22 23:39, Greg Kroah-Hartman wrote:
>> On Fri, Mar 04, 2022 at 03:23:54PM +0900, Daehwan Jung wrote:
>>> This patchset is for USB offload feature, which makes Co-processor to use
>>> some memories of xhci. Especially it's useful for USB Audio scenario.
>>> Audio stream would get shortcut because Co-processor directly write/read
>>> data in xhci memories. It could get speed-up using faster memory like SRAM.
>>> That's why this also gives vendors flexibilty of memory management.
>>> Below pathches have been merged in AOSP kernel(android12-5.10) and I put
>>> together and split into 3 patches. Plus let me add user(xhci-exynos) module
>>> to see how user could use it.
>>> To sum up, it's for providing xhci memories to Co-Processor.
>>> It would cover DCBAA, Device Context, Tranfer Ring, Event Ring, ERST.
>>> It needs xhci hooks and to export some xhci symbols.
>>> ANDROID: usb: host: fix slab-out-of-bounds in xhci_vendor_get_ops
>>> ANDROID: usb: export built-in tracepoint functions
>>> ANDROID: usb: host: Use old init scheme when hook unavailable
>>> ANDROID: usb: host: free the offload TR by vendor hook
>>> ANDROID: usb: host: xhci: provide function prototype for xhci_address_device
>>> ANDROID: usb: host: add bus_suspend/bus_resume to xhci overrides
>>> ANDROID: usb: host: add address_device to xhci overrides
>>> ANDROID: usb: host: add max packet parameter on alloc_transfer_ring hook
>>> ANDROID: usb: host: add xhci hooks for vendor specific container context
>>> ANDROID: usb: host: export xhci symbols for ring management
>>> ANDROID: usb: host: export additional xhci symbols for ring management
>>> FROMLIST: usb: xhci-plat: add xhci_plat_priv_overwrite
>>> FROMLIST: usb: host: export symbols for xhci hooks usage
>>> FROMLIST: usb: host: add xhci hooks for USB offload
>> What does that list of text mean? You are only submitting 4 patches
>> here, not that many.
>>> Below are owners of patches.
>>> Howard Yen <>
>>> Jack Pham <>
>>> Puma Hsu <>
>>> J. Avila <>
>>> chihhao.chen <>
>> What do you mean by this? Did you loose authorship of the code you just
>> submitted? That's not ok. You always have to properly credit the
>> creators of the changes you submit to us for obvious legal reasons.
>> Please fix up and resend this series properly.
> Also: Greg might have received the full patch series, but I didn't, so I
> checked, and it did not either, so it appears
> that there is a problem with sending the full series.

Yeah, lore did not get anything more than cover letter. What's more
interesting, the cover letter mention exynos:
drivers/usb/host/xhci-exynos.c | 2025 ++++++++++++++++++++++++++++++++
so should point you to additional people and lists,
which are not present here.

What is even more interesting, such file
"drivers/usb/host/xhci-exynos.c" does not exist... which could explain
missing CC above, but raises question what is this cover letter from? Is
it still Linux kernel or some other project?

Best regards,

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