From: Greg KH <gregkh@linuxfoundation.org>
To: Kai-Heng Feng <kai.heng.feng@canonical.com>
Cc: stern@rowland.harvard.edu, mathias.nyman@linux.intel.com,
oneukum@suse.com, Roy Luo <royluo@google.com>,
Heiner Kallweit <hkallweit1@gmail.com>,
Heikki Krogerus <heikki.krogerus@linux.intel.com>,
linux-usb@vger.kernel.org, linux-kernel@vger.kernel.org
Subject: Re: [PATCH] usb: Disable USB3 LPM at shutdown
Date: Tue, 26 Mar 2024 06:56:49 +0100 [thread overview]
Message-ID: <2024032639-deny-boggle-276e@gregkh> (raw)
In-Reply-To: <20240305065140.66801-1-kai.heng.feng@canonical.com>
On Tue, Mar 05, 2024 at 02:51:38PM +0800, Kai-Heng Feng wrote:
> SanDisks USB3 storage may disapper after system reboot:
>
> usb usb2-port3: link state change
> xhci_hcd 0000:00:14.0: clear port3 link state change, portsc: 0x2c0
> usb usb2-port3: do warm reset, port only
> xhci_hcd 0000:00:14.0: xhci_hub_status_data: stopping usb2 port polling
> xhci_hcd 0000:00:14.0: Get port status 2-3 read: 0x2b0, return 0x2b0
> usb usb2-port3: not warm reset yet, waiting 50ms
> xhci_hcd 0000:00:14.0: Get port status 2-3 read: 0x2f0, return 0x2f0
> usb usb2-port3: not warm reset yet, waiting 200ms
> ...
> xhci_hcd 0000:00:14.0: Get port status 2-3 read: 0x6802c0, return 0x7002c0
> usb usb2-port3: not warm reset yet, waiting 200ms
> xhci_hcd 0000:00:14.0: clear port3 reset change, portsc: 0x4802c0
> xhci_hcd 0000:00:14.0: clear port3 warm(BH) reset change, portsc: 0x4002c0
> xhci_hcd 0000:00:14.0: clear port3 link state change, portsc: 0x2c0
> xhci_hcd 0000:00:14.0: Get port status 2-3 read: 0x2c0, return 0x2c0
> usb usb2-port3: not enabled, trying warm reset again...
>
> This is due to the USB device still cause port change event after xHCI is
> shuted down:
>
> xhci_hcd 0000:38:00.0: // Setting command ring address to 0xffffe001
> xhci_hcd 0000:38:00.0: xhci_resume: starting usb3 port polling.
> xhci_hcd 0000:38:00.0: xhci_hub_status_data: stopping usb4 port polling
> xhci_hcd 0000:38:00.0: xhci_hub_status_data: stopping usb3 port polling
> xhci_hcd 0000:38:00.0: hcd_pci_runtime_resume: 0
> xhci_hcd 0000:38:00.0: xhci_shutdown: stopping usb3 port polling.
> xhci_hcd 0000:38:00.0: // Halt the HC
> xhci_hcd 0000:38:00.0: xhci_shutdown completed - status = 1
> xhci_hcd 0000:00:14.0: xhci_shutdown: stopping usb1 port polling.
> xhci_hcd 0000:00:14.0: // Halt the HC
> xhci_hcd 0000:00:14.0: xhci_shutdown completed - status = 1
> xhci_hcd 0000:00:14.0: Get port status 2-3 read: 0x1203, return 0x203
> xhci_hcd 0000:00:14.0: set port reset, actual port 2-3 status = 0x1311
> xhci_hcd 0000:00:14.0: Get port status 2-3 read: 0x201203, return 0x100203
> xhci_hcd 0000:00:14.0: clear port3 reset change, portsc: 0x1203
> xhci_hcd 0000:00:14.0: clear port3 warm(BH) reset change, portsc: 0x1203
> xhci_hcd 0000:00:14.0: clear port3 link state change, portsc: 0x1203
> xhci_hcd 0000:00:14.0: clear port3 connect change, portsc: 0x1203
> xhci_hcd 0000:00:14.0: Get port status 2-3 read: 0x1203, return 0x203
> usb 2-3: device not accepting address 2, error -108
> xhci_hcd 0000:00:14.0: xHCI dying or halted, can't queue_command
> xhci_hcd 0000:00:14.0: Set port 2-3 link state, portsc: 0x1203, write 0x11261
> xhci_hcd 0000:00:14.0: Get port status 2-3 read: 0x1263, return 0x263
> xhci_hcd 0000:00:14.0: set port reset, actual port 2-3 status = 0x1271
> xhci_hcd 0000:00:14.0: Get port status 2-3 read: 0x12b1, return 0x2b1
> usb usb2-port3: not reset yet, waiting 60ms
> ACPI: PM: Preparing to enter system sleep state S5
> xhci_hcd 0000:00:14.0: Get port status 2-3 read: 0x12f1, return 0x2f1
> usb usb2-port3: not reset yet, waiting 200ms
> reboot: Restarting system
>
> The port change event is caused by LPM transition, so disabling LPM at shutdown
> to make sure the device is in U0 for warmboot.
>
> Signed-off-by: Kai-Heng Feng <kai.heng.feng@canonical.com>
> ---
> drivers/usb/core/port.c | 4 +++-
> 1 file changed, 3 insertions(+), 1 deletion(-)
What commit id does this fix?
next prev parent reply other threads:[~2024-03-26 5:56 UTC|newest]
Thread overview: 7+ messages / expand[flat|nested] mbox.gz Atom feed top
2024-03-05 6:51 [PATCH] usb: Disable USB3 LPM at shutdown Kai-Heng Feng
2024-03-26 3:38 ` Kai-Heng Feng
2024-03-26 5:56 ` Greg KH
2024-03-26 9:29 ` Kai-Heng Feng
2024-03-26 5:56 ` Greg KH [this message]
2024-03-26 9:30 ` Kai-Heng Feng
2024-10-10 14:45 ` Jon Hunter
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