Created attachment 136131 [details] Errorhappen USB Device connected by USB Hub cannot be Recognised it seems like the Inquiry command failed and the USB device reset a lot Something wrong with the DMA transmit？ need help ~~~ Notice：The odds of this happening are quite low，Most of the time the usb device work well。 [ 31.642735] scsi_probe_and_add_lun: scsi_alloc_sdev end [ 31.659215] scsi_execute: req->cmd=18, 0, 0, 0, 36, 0 [ 31.674883] blk_execute_rq:wait_for_completion start [ 52.771720] cppi41_channel_abort: DMA busy,status=2 [ 52.786768] cppi41_get_teardown_info: dma_num == cppi41_num_dma_block [ 52.806614] usb_check_teardown:not a teardown descriptor [ 52.822985] usb_tx_ch_teardown 1047: Invalid PD(9f069000)popped from TearDn completionqueue [ 52.848875] usb_stor_invoke_transport: command was aborted [ 52.981830] usb 1-1: reset high speed USB device using musb-hdrc and address 2 [ 53.142833] scsi command aborted result=0x50000 [ 63.152043] cppi41_channel_abort: DMA busy,status=2 [ 63.167097] cppi41_get_teardown_info: dma_num == cppi41_num_dma_block [ 63.186946] usb_check_teardown:not a teardown descriptor [ 63.203315] usb_tx_ch_teardown 1047: Invalid PD(9f069000)popped from TearDn completionqueue [ 63.229272] usb_stor_invoke_transport: command was aborted [ 63.361852] usb 1-1: reset high speed USB device using musb-hdrc and address 2 [ 63.522612] scsi command aborted result=0x50000 [ 79.531713] cppi41_channel_abort: DMA busy,status=2 [ 79.546765] cppi41_get_teardown_info: dma_num == cppi41_num_dma_block [ 79.566620] usb_check_teardown:not a teardown descriptor [ 79.582988] usb_tx_ch_teardown 1047: Invalid PD(9f069040)popped from TearDn completionqueue [ 79.608877] usb_stor_invoke_transport: command was aborted [ 79.741853] usb 1-1: reset high speed USB device using musb-hdrc and address 2 [ 79.902536] scsi command aborted result=0x50000 [ 80.031854] usb 1-1: reset high speed USB device using musb-hdrc and address 2 [ 90.191974] cppi41_channel_abort: DMA busy,status=2 [ 90.207022] cppi41_get_teardown_info: dma_num == cppi41_num_dma_block [ 90.226871] usb_check_teardown:not a teardown descriptor [ 90.243243] usb_tx_ch_teardown 1047: Invalid PD(9f069040)popped from TearDn completionqueue [ 90.269170] usb_stor_invoke_transport: command was aborted [ 90.401706] usb 1-1: reset high speed USB device using musb-hdrc and address 2 [ 90.562603] scsi command aborted result=0x50000 [ 90.578826] scsi 0:0:0:0: Device offlined - not ready after error recovery [ 90.600292] blk_execute_rq:wait_for_completion end [ 90.615120] scsi_probe_lun: scsi_execute_req failed with code 0x50000 [ 90.634999] scsi_probe_lun return -EIO [ 90.646823] scsi_probe_and_add_lun: scsi_probe_lun failed
Created attachment 136141 [details] The normal state
2.6.27 is obsolete.
(In reply to Alan from comment #2) > 2.6.27 is obsolete. Sorry，Not obsolete for my program I need to reopen it
2.6.27 is obsolete as far as upstream is concerned. We don't care. Possibly you can find a business that still supports ancient ancient Linux but we don't even look at bug reports for it any more.