Re: [PATCH v2] usb: xhci: fixes lost of data for xHCI Cadence Controllers

[Mathias Nyman]

On 30.8.2024 18.45, Michał Pecio wrote:
> Hi,
>
> > Field Rsvd0 is reserved field, so patch should not have impact for
> > other xHCI controllers.
> Wait, is this a case of Linux failing to zero-initialize something that
> should be zero initialized before use (why not explain it as such?), or
> are you suggesting monkeying with internal xHC data at run time, in area
> which is known to actually be used by at least one implementation?

Patch is monkeying with internal xHC RsvdO field.


> There is no mention of Rsvd0 in the xHCI spec, did you mean RsvdO?
>
> Reserved and Opaque,
> For exclusive use by the xHC.
> Software shall *not* write this, unless allowed by the vendor.
>
> Cadence isn't the only xHC vendor...

Makes sense,  Pawel Laszczak, could you make this patch Cadence
specific.

Thanks
Mathias