The call on line 1120 looks suspicious, because qtd could be non-null but also not a valid element, if the loop has exited normally. julia On Sat, 19 Dec 2015, kbuild test robot wrote: > CC: kbuild-all@xxxxxx > In-Reply-To: <c123b5df7c51a27f33f0d423bf4752a221559fd1.1450455486.git.geliangtang@xxxxxxx> > TO: Geliang Tang <geliangtang@xxxxxxx> > CC: John Youn <johnyoun@xxxxxxxxxxxx>, Greg Kroah-Hartman <gregkh@xxxxxxxxxxxxxxxxxxx> > CC: Geliang Tang <geliangtang@xxxxxxx>, linux-usb@xxxxxxxxxxxxxxx, linux-kernel@xxxxxxxxxxxxxxx > > Hi Geliang, > > [auto build test WARNING on usb/usb-testing] > [also build test WARNING on v4.4-rc5 next-20151218] > > url: https://github.com/0day-ci/linux/commits/Geliang-Tang/usb-host-fotg210-use-list_for_each_entry_safe/20151219-003955 > base: https://git.kernel.org/pub/scm/linux/kernel/git/gregkh/usb.git usb-testing > :::::: branch date: 2 hours ago > :::::: commit date: 2 hours ago > > >> drivers/usb/dwc2/hcd_ddma.c:1119:11-14: ERROR: invalid reference to the index variable of the iterator on line 1096 > > git remote add linux-review https://github.com/0day-ci/linux > git remote update linux-review > git checkout 61366173f3eb9bee0d5cd22e6a7c5407b14087cb > vim +1119 drivers/usb/dwc2/hcd_ddma.c > > dc4c76e7 drivers/staging/dwc2/hcd_ddma.c Paul Zimmerman 2013-03-11 1090 if (chan->halt_status == DWC2_HC_XFER_URB_DEQUEUE) { > dc4c76e7 drivers/staging/dwc2/hcd_ddma.c Paul Zimmerman 2013-03-11 1091 list_for_each_entry(qtd, &qh->qtd_list, qtd_list_entry) > dc4c76e7 drivers/staging/dwc2/hcd_ddma.c Paul Zimmerman 2013-03-11 1092 qtd->in_process = 0; > dc4c76e7 drivers/staging/dwc2/hcd_ddma.c Paul Zimmerman 2013-03-11 1093 return; > dc4c76e7 drivers/staging/dwc2/hcd_ddma.c Paul Zimmerman 2013-03-11 1094 } > dc4c76e7 drivers/staging/dwc2/hcd_ddma.c Paul Zimmerman 2013-03-11 1095 > 61366173 drivers/usb/dwc2/hcd_ddma.c Geliang Tang 2015-12-19 @1096 list_for_each_entry_safe(qtd, tmp, &qh->qtd_list, qtd_list_entry) { > dc4c76e7 drivers/staging/dwc2/hcd_ddma.c Paul Zimmerman 2013-03-11 1097 int i; > dc4c76e7 drivers/staging/dwc2/hcd_ddma.c Paul Zimmerman 2013-03-11 1098 > dc4c76e7 drivers/staging/dwc2/hcd_ddma.c Paul Zimmerman 2013-03-11 1099 xfer_done = 0; > dc4c76e7 drivers/staging/dwc2/hcd_ddma.c Paul Zimmerman 2013-03-11 1100 > dc4c76e7 drivers/staging/dwc2/hcd_ddma.c Paul Zimmerman 2013-03-11 1101 for (i = 0; i < qtd->n_desc; i++) { > dc4c76e7 drivers/staging/dwc2/hcd_ddma.c Paul Zimmerman 2013-03-11 1102 if (dwc2_process_non_isoc_desc(hsotg, chan, chnum, qtd, > dc4c76e7 drivers/staging/dwc2/hcd_ddma.c Paul Zimmerman 2013-03-11 1103 desc_num, halt_status, > fbd1cd20 drivers/staging/dwc2/hcd_ddma.c Paul Zimmerman 2013-11-22 1104 &xfer_done)) { > fbd1cd20 drivers/staging/dwc2/hcd_ddma.c Paul Zimmerman 2013-11-22 1105 qtd = NULL; > dc4c76e7 drivers/staging/dwc2/hcd_ddma.c Paul Zimmerman 2013-03-11 1106 break; > fbd1cd20 drivers/staging/dwc2/hcd_ddma.c Paul Zimmerman 2013-11-22 1107 } > dc4c76e7 drivers/staging/dwc2/hcd_ddma.c Paul Zimmerman 2013-03-11 1108 desc_num++; > dc4c76e7 drivers/staging/dwc2/hcd_ddma.c Paul Zimmerman 2013-03-11 1109 } > dc4c76e7 drivers/staging/dwc2/hcd_ddma.c Paul Zimmerman 2013-03-11 1110 } > dc4c76e7 drivers/staging/dwc2/hcd_ddma.c Paul Zimmerman 2013-03-11 1111 > dc4c76e7 drivers/staging/dwc2/hcd_ddma.c Paul Zimmerman 2013-03-11 1112 if (qh->ep_type != USB_ENDPOINT_XFER_CONTROL) { > dc4c76e7 drivers/staging/dwc2/hcd_ddma.c Paul Zimmerman 2013-03-11 1113 /* > dc4c76e7 drivers/staging/dwc2/hcd_ddma.c Paul Zimmerman 2013-03-11 1114 * Resetting the data toggle for bulk and interrupt endpoints > dc4c76e7 drivers/staging/dwc2/hcd_ddma.c Paul Zimmerman 2013-03-11 1115 * in case of stall. See handle_hc_stall_intr(). > dc4c76e7 drivers/staging/dwc2/hcd_ddma.c Paul Zimmerman 2013-03-11 1116 */ > dc4c76e7 drivers/staging/dwc2/hcd_ddma.c Paul Zimmerman 2013-03-11 1117 if (halt_status == DWC2_HC_XFER_STALL) > dc4c76e7 drivers/staging/dwc2/hcd_ddma.c Paul Zimmerman 2013-03-11 1118 qh->data_toggle = DWC2_HC_PID_DATA0; > dc4c76e7 drivers/staging/dwc2/hcd_ddma.c Paul Zimmerman 2013-03-11 @1119 else if (qtd) > dc4c76e7 drivers/staging/dwc2/hcd_ddma.c Paul Zimmerman 2013-03-11 1120 dwc2_hcd_save_data_toggle(hsotg, chan, chnum, qtd); > dc4c76e7 drivers/staging/dwc2/hcd_ddma.c Paul Zimmerman 2013-03-11 1121 } > dc4c76e7 drivers/staging/dwc2/hcd_ddma.c Paul Zimmerman 2013-03-11 1122 > > :::::: The code at line 1119 was first introduced by commit > :::::: dc4c76e7b22cdcc1ba71ff87edee55f464e01658 staging: HCD descriptor DMA support for the DWC2 driver > > :::::: TO: Paul Zimmerman <Paul.Zimmerman@xxxxxxxxxxxx> > :::::: CC: Greg Kroah-Hartman <gregkh@xxxxxxxxxxxxxxxxxxx> > > --- > 0-DAY kernel test infrastructure Open Source Technology Center > https://lists.01.org/pipermail/kbuild-all Intel Corporation > -- To unsubscribe from this list: send the line "unsubscribe linux-usb" in the body of a message to majordomo@xxxxxxxxxxxxxxx More majordomo info at http://vger.kernel.org/majordomo-info.html
