Re: [PATCH v7] usb: xhci-mtk: fix unreleased bandwidth data

Re: [PATCH v7] usb: xhci-mtk: fix unreleased bandwidth data

[Chunfeng Yun]

On Fri, 2021-01-29 at 11:27 +0100, Greg Kroah-Hartman wrote:
> On Fri, Jan 29, 2021 at 05:38:19PM +0800, Chunfeng Yun wrote:
> > From: Ikjoon Jang <ikjn@chromium.org>
> > 
> > xhci-mtk needs XHCI_MTK_HOST quirk functions in add_endpoint() and
> > drop_endpoint() to handle its own sw bandwidth management.
> > 
> > It stores bandwidth data into an internal table every time
> > add_endpoint() is called, and drops those in drop_endpoint().
> > But when bandwidth allocation fails at one endpoint, all earlier
> > allocation from the same interface could still remain at the table.
> > 
> > This patch moves bandwidth management codes to check_bandwidth() and
> > reset_bandwidth() path. To do so, this patch also adds those functions
> > to xhci_driver_overrides and lets mtk-xhci to release all failed
> > endpoints in reset_bandwidth() path.
> > 
> > Fixes: 08e469de87a2 ("usb: xhci-mtk: supports bandwidth scheduling with multi-TT")
> > Signed-off-by: Ikjoon Jang <ikjn@chromium.org>
> > Signed-off-by: Chunfeng Yun <chunfeng.yun@mediatek.com>
> > ---
> > Changes in v7 from Chunfeng:
> > - rename xhci_mtk_droop_ep() as destroy_sch_ep(), and include parameters
> > - add member @allocated in mu3h_sch_ep_info struct
> >   used to skip endpoint not allocated bandwidth
> > - use xhci_dbg() instead of dev_dbg()
> > - rename bw_ep_list_new as bw_ep_chk_list
> 
> As a previous version of this patch is already in my public tree, just
> send a follow-on patch that resolves the issues in the previous one, as
> I can not apply this one.  Bonus is that you get the credit for fixing
> these issues :)
Ok, thanks

> 
> thanks,
> 
> greg k-h