On Fri, Jan 29, 2021 at 05:38:19PM +0800, Chunfeng Yun wrote:

From: Ikjoon Jang <redacted>

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 <redacted>
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 :)

thanks,

greg k-h

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