The patch below does not apply to the 5.15-stable tree. If someone wants it applied there, or to any other stable or longterm tree, then please email the backport, including the original git commit id to stable@vger.kernel.org.
To reproduce the conflict and resubmit, you may use the following commands:
git fetch https://git.kernel.org/pub/scm/linux/kernel/git/stable/linux.git/ linux-5.15.y git checkout FETCH_HEAD git cherry-pick -x e1003aa7ec9eccdde4c926bd64ef42816ad55f25 # <resolve conflicts, build, test, etc.> git commit -s git send-email --to 'stable@vger.kernel.org' --in-reply-to '2025122911-punctual-slapping-497e@gregkh' --subject-prefix 'PATCH 5.15.y' HEAD^..
Possible dependencies:
thanks,
greg k-h
------------------ original commit in Linus's tree ------------------
From e1003aa7ec9eccdde4c926bd64ef42816ad55f25 Mon Sep 17 00:00:00 2001 From: Udipto Goswami udipto.goswami@oss.qualcomm.com Date: Wed, 26 Nov 2025 11:12:21 +0530 Subject: [PATCH] usb: dwc3: keep susphy enabled during exit to avoid controller faults
On some platforms, switching USB roles from host to device can trigger controller faults due to premature PHY power-down. This occurs when the PHY is disabled too early during teardown, causing synchronization issues between the PHY and controller.
Keep susphy enabled during dwc3_host_exit() and dwc3_gadget_exit() ensures the PHY remains in a low-power state capable of handling required commands during role switch.
Cc: stable stable@kernel.org Fixes: 6d735722063a ("usb: dwc3: core: Prevent phy suspend during init") Suggested-by: Thinh Nguyen Thinh.Nguyen@synopsys.com Signed-off-by: Udipto Goswami udipto.goswami@oss.qualcomm.com Acked-by: Thinh Nguyen Thinh.Nguyen@synopsys.com Link: https://patch.msgid.link/20251126054221.120638-1-udipto.goswami@oss.qualcomm... Signed-off-by: Greg Kroah-Hartman gregkh@linuxfoundation.org
diff --git a/drivers/usb/dwc3/gadget.c b/drivers/usb/dwc3/gadget.c index bc3fe31638b9..8a35a6901db7 100644 --- a/drivers/usb/dwc3/gadget.c +++ b/drivers/usb/dwc3/gadget.c @@ -4826,7 +4826,7 @@ void dwc3_gadget_exit(struct dwc3 *dwc) if (!dwc->gadget) return;
- dwc3_enable_susphy(dwc, false); + dwc3_enable_susphy(dwc, true); usb_del_gadget(dwc->gadget); dwc3_gadget_free_endpoints(dwc); usb_put_gadget(dwc->gadget); diff --git a/drivers/usb/dwc3/host.c b/drivers/usb/dwc3/host.c index cf6512ed17a6..96b588bd08cd 100644 --- a/drivers/usb/dwc3/host.c +++ b/drivers/usb/dwc3/host.c @@ -227,7 +227,7 @@ void dwc3_host_exit(struct dwc3 *dwc) if (dwc->sys_wakeup) device_init_wakeup(&dwc->xhci->dev, false);
- dwc3_enable_susphy(dwc, false); + dwc3_enable_susphy(dwc, true); platform_device_unregister(dwc->xhci); dwc->xhci = NULL; }