From e1003aa7ec9eccdde4c926bd64ef42816ad55f25 Mon Sep 17 00:00:00 2001 From: Udipto Goswami 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 Fixes: 6d735722063a ("usb: dwc3: core: Prevent phy suspend during init") Suggested-by: Thinh Nguyen Signed-off-by: Udipto Goswami Acked-by: Thinh Nguyen Link: https://patch.msgid.link/20251126054221.120638-1-udipto.goswami@oss.qualcomm.com Signed-off-by: Greg Kroah-Hartman --- drivers/usb/dwc3/gadget.c | 2 +- drivers/usb/dwc3/host.c | 2 +- 2 files changed, 2 insertions(+), 2 deletions(-) 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; } -- 2.47.3