Messages in this thread | | | Date | Sun, 28 Nov 2004 19:53:30 +0100 | From | Jens Axboe <> | Subject | Re: Is controlling DVD speeds via SET_STREAMING supported? |
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(don't trim the cc list, please!!)
On Sun, Nov 28 2004, Pasi Savolainen wrote: > * Jens Axboe <axboe@suse.de>: > >> > I modified your speed-1.0 to open device O_RDWR, didn't help. > >> > I modified it to also dump_sense after CMD_SEND_PACKET, it's just > >> > duplicate packet. > >> > >> No this will definitively not solve this issue. I will try to check this > >> in the kernel, but because I'm not a kernel developer I will CC Jens > >> Axboe. Maybe he can help? > > > > Just fix the permission on the special file. Additionally, the program > > must open the device O_RDWR. > > (under 2.6.10-rc2-mm1) > I ran speed-1.0 program as root and also modified to open the device > file as O_RDWR. This didn't help, it still reports same error.
Ehm I don't see how that is possible, since that kernel definitely contains SET_STREAMING as a write safe command. Are you 110% sure you are running the kernel you think you are?
> Booted into 2.4.28, speed-1.0 didn't do the trick there either. 'sense' > reported was 00.00.00 though.
Any dmesg errors from 2.4.28? The sense reporting might be a bit broken there, but if you don't set cgc->quiet it should report the error in the kernel ring buffer at least.
-- Jens Axboe
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