From 9c1aa36efdae0c97c6d7285187b0573fc1793552 Mon Sep 17 00:00:00 2001 From: Mathias Nyman Date: Thu, 12 Mar 2020 16:45:11 +0200 Subject: xhci: Show host status when watchdog triggers and host is assumed dead. Additional debugging to show xHC USBSTS register when stop endpoint command watchdog triggers and host is assumed dead. useful to know the current status before the controller is stopped by the xhci driver and everything is released and freed. Signed-off-by: Mathias Nyman Link: https://lore.kernel.org/r/20200312144517.1593-4-mathias.nyman@linux.intel.com Signed-off-by: Greg Kroah-Hartman --- drivers/usb/host/xhci.h | 29 +++++++++++++++++++++++++++++ 1 file changed, 29 insertions(+) (limited to 'drivers/usb/host/xhci.h') diff --git a/drivers/usb/host/xhci.h b/drivers/usb/host/xhci.h index 685180e1b98a..3ff199c9aea6 100644 --- a/drivers/usb/host/xhci.h +++ b/drivers/usb/host/xhci.h @@ -2589,6 +2589,35 @@ static inline const char *xhci_decode_portsc(u32 portsc) return str; } +static inline const char *xhci_decode_usbsts(u32 usbsts) +{ + static char str[256]; + int ret = 0; + + if (usbsts == ~(u32)0) + return " 0xffffffff"; + if (usbsts & STS_HALT) + ret += sprintf(str + ret, " HCHalted"); + if (usbsts & STS_FATAL) + ret += sprintf(str + ret, " HSE"); + if (usbsts & STS_EINT) + ret += sprintf(str + ret, " EINT"); + if (usbsts & STS_PORT) + ret += sprintf(str + ret, " PCD"); + if (usbsts & STS_SAVE) + ret += sprintf(str + ret, " SSS"); + if (usbsts & STS_RESTORE) + ret += sprintf(str + ret, " RSS"); + if (usbsts & STS_SRE) + ret += sprintf(str + ret, " SRE"); + if (usbsts & STS_CNR) + ret += sprintf(str + ret, " CNR"); + if (usbsts & STS_HCE) + ret += sprintf(str + ret, " HCE"); + + return str; +} + static inline const char *xhci_decode_doorbell(u32 slot, u32 doorbell) { static char str[256]; -- cgit