From: Peter Chen <peter.chen@nxp.com>
To: Alan Stern <stern@rowland.harvard.edu>
Cc: "linux-usb@vger.kernel.org" <linux-usb@vger.kernel.org>
Subject: No disconnection event for suspended device at v5.6
Date: Wed, 15 Apr 2020 10:32:08 +0000 [thread overview]
Message-ID: <20200415103232.GA5609@b29397-desktop> (raw)
Hi Alan,
With commit e5d078af8e5f ("USB: hub: Don't record a connect-change event
during reset-resume"), the disconnection event for the suspended device
(eg, removable hub with no device connected, auto-suspended mouse) at
roothub can't occur due to no hub->change_bits is set. Below is the
debug message:
imx_usb 30b20000.usb: at imx_controller_resume
usbmisc_imx 30b20200.usbmisc: wakeup int
ci_hdrc ci_hdrc.1: at ci_controller_resume
usb usb1: usb wakeup-resume
usb usb1: usb auto-resume
ci_hdrc ci_hdrc.1: resume root hub
hub 1-0:1.0: hub_resume
ci_hdrc ci_hdrc.1: GetStatus port:1 status 1c00100a 14
e0 PEC CSC
usb usb1-port1: status 0100 change 0003
hub 1-0:1.0: state 7 ports 1 chg 0000 evt 0000
hub 1-0:1.0: hub_suspend
usb usb1: bus auto-suspend, wakeup 1
ci_hdrc ci_hdrc.1: suspend root hub
ci_hdrc ci_hdrc.1: at ci_runtime_suspend
imx_usb 30b20000.usb: at imx_controller_suspend
--
Thanks,
Peter Chen
next reply other threads:[~2020-04-15 10:35 UTC|newest]
Thread overview: 8+ messages / expand[flat|nested] mbox.gz Atom feed top
2020-04-15 10:32 Peter Chen [this message]
2020-04-15 19:40 ` No disconnection event for suspended device at v5.6 Alan Stern
2020-04-15 23:22 ` Paul Zimmerman
2020-04-16 14:34 ` Alan Stern
2020-04-16 19:46 ` Paul Zimmerman
2020-04-16 20:20 ` Alan Stern
2020-04-17 2:42 ` Peter Chen
2020-04-16 1:18 ` Peter Chen
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