Messages in this thread | | | From | Alan Chandler <> | Subject | Re: ide-cd problem | Date | Sun, 21 Nov 2004 00:53:44 +0000 |
| |
On Saturday 20 November 2004 19:47, Jens Axboe wrote: > On Sat, Nov 20 2004, Alan Chandler wrote: ... > > Normally, because the requested data_len is not zero, the data is > > sent. In this case however, because the original request had nothing > > to send, the while/if clauses to initiate a new transfer are skipped > > and the routine ends up setting a new interrupt handler address and > > returning to await an interrupt that will never come. > > The big question is - what does the original command look like? Just > dumping rq->cmd[0] would be a big help, but really just put code in > sg_io() in block/scsi_ioctl.c to dump the completed sg_io_hdr_t and send > that.
I haven't dumped the whole request header, but the command (after it has been retrieved from the user) and the dxfer_length. Is there anything else I should dump?
Here is the output leading up to the point where ide-cd hangs because the IO is just left pending
Nov 21 00:44:20 kanger kernel: sg_io command length 10 Nov 21 00:44:20 kanger kernel: sg_io command [0] = 0x3c Nov 21 00:44:20 kanger kernel: sg_io command [1] = 0x0 Nov 21 00:44:20 kanger kernel: sg_io command [2] = 0x0 Nov 21 00:44:20 kanger kernel: sg_io command [3] = 0x0 Nov 21 00:44:20 kanger kernel: sg_io command [4] = 0x0 Nov 21 00:44:20 kanger kernel: sg_io command [5] = 0x0 Nov 21 00:44:20 kanger kernel: sg_io command [6] = 0x0 Nov 21 00:44:20 kanger kernel: sg_io command [7] = 0xfc Nov 21 00:44:20 kanger kernel: sg_io command [8] = 0x0 Nov 21 00:44:20 kanger kernel: sg_io command [9] = 0x0 Nov 21 00:44:20 kanger kernel: sg_io dxfer_len = 64512 Nov 21 00:44:20 kanger kernel: sg_io command length 10 Nov 21 00:44:20 kanger kernel: sg_io command [0] = 0x3c Nov 21 00:44:20 kanger kernel: sg_io command [1] = 0x0 Nov 21 00:44:20 kanger kernel: sg_io command [2] = 0x0 Nov 21 00:44:20 kanger kernel: sg_io command [3] = 0x0 Nov 21 00:44:20 kanger kernel: sg_io command [4] = 0x0 Nov 21 00:44:20 kanger kernel: sg_io command [5] = 0x0 Nov 21 00:44:20 kanger kernel: sg_io command [6] = 0x0 Nov 21 00:44:20 kanger kernel: sg_io command [7] = 0xfc Nov 21 00:44:20 kanger kernel: sg_io command [8] = 0x0 Nov 21 00:44:20 kanger kernel: sg_io command [9] = 0x0 Nov 21 00:44:20 kanger kernel: sg_io dxfer_len = 64512 Nov 21 00:44:20 kanger kernel: sg_io command length 10 Nov 21 00:44:20 kanger kernel: sg_io command [0] = 0x3c Nov 21 00:44:20 kanger kernel: sg_io command [1] = 0x0 Nov 21 00:44:20 kanger kernel: sg_io command [2] = 0x0 Nov 21 00:44:20 kanger kernel: sg_io command [3] = 0x0 Nov 21 00:44:20 kanger kernel: sg_io command [4] = 0x0 Nov 21 00:44:20 kanger kernel: sg_io command [5] = 0x0 Nov 21 00:44:20 kanger kernel: sg_io command [6] = 0x0 Nov 21 00:44:20 kanger kernel: sg_io command [7] = 0xfc Nov 21 00:44:20 kanger kernel: sg_io command [8] = 0x0 Nov 21 00:44:20 kanger kernel: sg_io command [9] = 0x0 Nov 21 00:44:20 kanger kernel: sg_io dxfer_len = 64512 Nov 21 00:44:20 kanger kernel: sg_io command length 10 Nov 21 00:44:20 kanger kernel: sg_io command [0] = 0x3c Nov 21 00:44:20 kanger kernel: sg_io command [1] = 0x0 Nov 21 00:44:20 kanger kernel: sg_io command [2] = 0x0 Nov 21 00:44:20 kanger kernel: sg_io command [3] = 0x0 Nov 21 00:44:20 kanger kernel: sg_io command [4] = 0x0 Nov 21 00:44:20 kanger kernel: sg_io command [5] = 0x0 Nov 21 00:44:20 kanger kernel: sg_io command [6] = 0x0 Nov 21 00:44:20 kanger kernel: sg_io command [7] = 0xfc Nov 21 00:44:20 kanger kernel: sg_io command [8] = 0x0 Nov 21 00:44:20 kanger kernel: sg_io command [9] = 0x0 Nov 21 00:44:20 kanger kernel: sg_io dxfer_len = 64512 Nov 21 00:44:20 kanger kernel: sg_io command length 6 Nov 21 00:44:20 kanger kernel: sg_io command [0] = 0x0 Nov 21 00:44:20 kanger kernel: sg_io command [1] = 0x0 Nov 21 00:44:20 kanger kernel: sg_io command [2] = 0x0 Nov 21 00:44:20 kanger kernel: sg_io command [3] = 0x0 Nov 21 00:44:20 kanger kernel: sg_io command [4] = 0x0 Nov 21 00:44:20 kanger kernel: sg_io command [5] = 0x0 Nov 21 00:44:20 kanger kernel: sg_io dxfer_len = 0 Nov 21 00:44:20 kanger kernel: sg_io command length 6 Nov 21 00:44:20 kanger kernel: sg_io command [0] = 0x1b Nov 21 00:44:20 kanger kernel: sg_io command [1] = 0x0 Nov 21 00:44:20 kanger kernel: sg_io command [2] = 0x0 Nov 21 00:44:20 kanger kernel: sg_io command [3] = 0x0 Nov 21 00:44:20 kanger kernel: sg_io command [4] = 0x3 Nov 21 00:44:20 kanger kernel: sg_io command [5] = 0x0 Nov 21 00:44:20 kanger kernel: sg_io dxfer_len = 0 Nov 21 00:45:00 kanger kernel: hdc: lost interrupt Nov 21 00:45:40 kanger kernel: hdc: lost interrupt Nov 21 00:47:00 kanger last message repeated 2 times Nov 21 00:47:40 kanger kernel: hdc: lost interrupt
-- Alan Chandler alan@chandlerfamily.org.uk First they ignore you, then they laugh at you, then they fight you, then you win. --Gandhi - To unsubscribe from this list: send the line "unsubscribe linux-kernel" in the body of a message to majordomo@vger.kernel.org More majordomo info at http://vger.kernel.org/majordomo-info.html Please read the FAQ at http://www.tux.org/lkml/
| |