The td_dma value is listed as following, I think these are incorrectly, but I don't know why. [ 11.930000] 348001 [ 11.930000] 3480c0 [ 11.930000] 348000 [ 11.930000] 3480c0 [ 11.930000] 348000 [ 11.930000] 3480c0 [ 11.930000] 348000 [ 11.930000] 3480c0 [ 11.930000] 348000
It seems td1->td2->td1->td2, this is a deadly loop. However, the first td_dma value is 0x348001, is this value error? Darwin Chen. -----Original Message----- From: [EMAIL PROTECTED] [mailto:[EMAIL PROTECTED] On Behalf Of Darwin Chen Sent: Friday, October 19, 2007 9:59 PM To: linux-usb-users@lists.sourceforge.net Subject: [Linux-usb-users] OHCI dl_reverse_done_list() deadly loop... Dear all, I found a dealy loop in dl_reverse_done_list(), the while-loop doesn't exit after the system prompts: [ 0.880000] w90n740-ohci w90n740-ohci: GetStatus roothub.portstatus [0] = 0x00010101 CSC PPS CCS [ 0.890000] hub_port_status outside. [ 0.900000] hub 1-0:1.0: port 1, status 0101, change 0001, 12 Mb/s [ 1.060000] hub 1-0:1.0: debounce: port 1: total 100ms stable 100ms status 0x101 [ 1.140000] w90n740-ohci w90n740-ohci: GetStatus roothub.portstatus [0] = 0x00100103 PRSC PPS PES CCS [ 1.210000] usb 1-1: new full speed USB device using w90n740-ohci and address 2 [ 1.310000] w90n740-ohci w90n740-ohci: GetStatus roothub.portstatus [0] = 0x00100103 PRSC PPS PES CCS But the USB system is worked well when the OHCI_VERBOSE_DEBUG is defined in ohci-hcd.c. Is there anyone help me? BTW, the kernel is uClinux-2.6.22, the CPU is Windond W90N740, and the DMA is not implemented in this kernel. static struct td *dl_reverse_done_list (struct ohci_hcd *ohci) { u32 td_dma; struct td *td_rev = NULL; struct td *td = NULL; td_dma = hc32_to_cpup (ohci, &ohci->hcca->done_head); ohci->hcca->done_head = 0; wmb(); /* get TD from hc's singly linked list, and * prepend to ours. ed->td_list changes later. */ while (td_dma) { int cc; td = dma_to_td (ohci, td_dma); if (!td) { ohci_err (ohci, "bad entry %8x\n", td_dma); break; } td->hwINFO |= cpu_to_hc32 (ohci, TD_DONE); cc = TD_CC_GET (hc32_to_cpup (ohci, &td->hwINFO)); /* Non-iso endpoints can halt on error; un-halt, * and dequeue any other TDs from this urb. * No other TD could have caused the halt. */ if (cc != TD_CC_NOERROR && (td->ed->hwHeadP & cpu_to_hc32 (ohci, ED_H))) td_rev = ed_halted (ohci, td, cc, td_rev); td->next_dl_td = td_rev; td_rev = td; td_dma = hc32_to_cpup (ohci, &td->hwNextTD); } return td_rev; } ------------------------------------------------------------------------- This SF.net email is sponsored by: Splunk Inc. Still grepping through log files to find problems? Stop. Now Search log events and configuration files using AJAX and a browser. Download your FREE copy of Splunk now >> http://get.splunk.com/ _______________________________________________ Linux-usb-users@lists.sourceforge.net To unsubscribe, use the last form field at: https://lists.sourceforge.net/lists/listinfo/linux-usb-users ------------------------------------------------------------------------- This SF.net email is sponsored by: Splunk Inc. Still grepping through log files to find problems? Stop. Now Search log events and configuration files using AJAX and a browser. Download your FREE copy of Splunk now >> http://get.splunk.com/ _______________________________________________ Linux-usb-users@lists.sourceforge.net To unsubscribe, use the last form field at: https://lists.sourceforge.net/lists/listinfo/linux-usb-users
