From: Udipto Goswami Date: Wed, 26 Nov 2025 05:42:21 +0000 (+0530) Subject: usb: dwc3: keep susphy enabled during exit to avoid controller faults X-Git-Tag: v6.18.3~139 X-Git-Url: http://git.ipfire.org/cgi-bin/gitweb.cgi?a=commitdiff_plain;h=1f069425f4f089d3c92064f276e90cf8170df182;p=thirdparty%2Fkernel%2Fstable.git usb: dwc3: keep susphy enabled during exit to avoid controller faults commit e1003aa7ec9eccdde4c926bd64ef42816ad55f25 upstream. 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 Signed-off-by: Greg Kroah-Hartman --- diff --git a/drivers/usb/dwc3/gadget.c b/drivers/usb/dwc3/gadget.c index 5e4997f974ddd..17eebb60900bf 100644 --- a/drivers/usb/dwc3/gadget.c +++ b/drivers/usb/dwc3/gadget.c @@ -4825,7 +4825,7 @@ 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 e77fd86d09cf0..3f075c57605cb 100644 --- a/drivers/usb/dwc3/host.c +++ b/drivers/usb/dwc3/host.c @@ -226,7 +226,7 @@ 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; }