https://bugzilla.kernel.org/show_bug.cgi?id=214875 --- Comment #1 from Walt Jr. Brake (mr.yming81@xxxxxxxxx) --- Yesterday I try to fix it myself, and after I revert the patch [usb: core: reduce power-on-good delay time of root hub](https://lore.kernel.org/all/1618017645-12259-1-git-send-email-chunfeng.yun%40mediatek.com/), compile the kernel and test, it works. Here is the patch: diff --git a/drivers/usb/core/hub.h b/drivers/usb/core/hub.h index 22ea1f4f2d66..73f4482d833a 100644 --- a/drivers/usb/core/hub.h +++ b/drivers/usb/core/hub.h @@ -148,10 +148,8 @@ static inline unsigned hub_power_on_good_delay(struct usb_hub *hub) { unsigned delay = hub->descriptor->bPwrOn2PwrGood * 2; - if (!hub->hdev->parent) /* root hub */ - return delay; - else /* Wait at least 100 msec for power to become stable */ - return max(delay, 100U); + /* Wait at least 100 msec for power to become stable */ + return max(delay, 100U); } static inline int hub_port_debounce_be_connected(struct usb_hub *hub, -- You may reply to this email to add a comment. You are receiving this mail because: You are watching the assignee of the bug.
