RE: Question: where should the SCSI driver place MODE_SENSE data ?
From: Ju, Seokmann
Date: Tue Mar 21 2006 - 17:40:30 EST
Any comment on this question would be appreciated.
> -----Original Message-----
> From: Ju, Seokmann
> Sent: Tuesday, March 21, 2006 11:45 AM
> To: 'James Bottomley'
> Cc: linux-scsi; linux-kernel
> Subject: Question: where should the SCSI driver place
> MODE_SENSE data ?
> In the 2.6 (2.6.9 and scsi-misc in git) kernel, MODE_SENSE
> SCSI command packet (scsi_cmnd) carries following entries
> with unexpectedly small in size.
> - request_bufflen
> - bufflen
> Especially for MODE SENSE with page code 8 (caching page),
> driver has minumum 12 Bytes MODE_SENSE data to deliver
> besides 'mode parameter header' and 'block descriptors'.
> When I dump those entries, they both are 4 Bytes in size.
> To me, it seems like that SCSI mid layer allocated 512 Bytes
> for MODE_SENSE data buffer, but the buffer length passed down
> to LLD incorrectly.
> Please guide me if there is anything missing.
> Thank you,
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