Re: [PATCH v3 0/2] Avoid re-initializing XHCI HC during removal

From: Wesley Cheng
Date: Wed Jun 21 2023 - 15:47:51 EST


Friendly ping to see if there are any review feedback/concerns with this series?

Thanks
Wesley Cheng

On 5/31/2023 3:27 PM, Wesley Cheng wrote:
There is an extra amount of overhead being adding to XHCI HCD removal
cases when the HCD needs to undergo a runtime resume. The xhc_reinit
logic will attempt to restart the HC if there is a HCE observed during
resume. However, in the removal case, this is not required as the
XHCI stop/halt will execute the same operations. In addition, it isn't
needed that the HC be placed back into the running state if it is being
removed.

Changes in v3:
- Update xhci-plat to set the removal flag before issuing the runtime PM
get

Changes in v2:
- Fixed spacing issue

Wesley Cheng (2):
usb: host: xhci: Do not re-initialize the XHCI HC if being removed
usb: host: xhci-plat: Set XHCI_STATE_REMOVING before resuming XHCI HC

drivers/usb/host/xhci-plat.c | 2 +-
drivers/usb/host/xhci.c | 3 ++-
2 files changed, 3 insertions(+), 2 deletions(-)