[EMAIL PROTECTED] wrote:
>
> Hi,
> How can I get the error info after a failed ioctl? I send a CDB
>
> to the device and it is failing... but when I do a CDB to return the error
> codes it is blank. It looks like the SCSI passthrough driver has already
> got the information.
>
> How do I get it?
Neal,
Are you talking about the SCSI_IOCTL_SEND_COMMAND ioctl()?
If so, from the code (scsi_ioctl.c around line 319), it looks
like the sense buffer is written back overwriting the
command that you sent into the ioctl().
The scsi sub-system does "auto-sense" which means that it
automatically executes REQUEST SENSE after a failure
was detected on the original command. Doing an explicit
REQUEST SENSE subsequent to the auto-sense will not be
useful.
Doug Gilbert
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