Re: CDROM_SEND_PACKET oddity

[Jens Axboe]

On Fri, Sep 26 2003, Derek Foreman wrote:
> The example code from
> http://www.ussg.iu.edu/hypermail/linux/kernel/0202.0/att-0603/01-cd_poll.c
> 
> Does not behave as expected on my 2.6.0-test5 system.  While the command 
> seems to be successfully sent - 2 of my drives report it as an invalid 
> opcode - for the other 2 drives, the buffer comes back all zeros.
> (actually, the buffer's contents will remain in whatever state they're in 
> before the ioctl is called)
> 
> Sending the same command to those 2 drives with SG_IO results in the 
> expected behaviour.

Can you try current -bk? It has some fixes for CDROM_SEND_PACKET.

However, cd_poll should be rewritten to use SG_IO. Pretty trivial
exercise.

-- 
Jens Axboe

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