2.6.23-rcX SG_GET_SCSI_ID regression?

2.6.23-rcX SG_GET_SCSI_ID regression?

[Joerg Platte]

Hi,

sane is not able to detect my old SCSI scanner with kernel 2.6.23-rc9. The 
scanner was found with 2.6.22.8. According to strace the behavior of the 
SG_GET_SCSI_ID ioctl changed:

2.6.22.8:
open("/dev/scanner", O_RDWR|O_NONBLOCK|O_EXCL) = 3
ioctl(3, SG_SET_TIMEOUT, 0xbfe40624)    = 0
ioctl(3, SG_GET_VERSION_NUM, 0x8063fa4) = 0
ioctl(3, SG_GET_SCSI_ID, 0xbfe405e0)    = 0

2.6.23-rc9:
open("/dev/scanner", O_RDWR|O_NONBLOCK|O_EXCL) = 3
ioctl(3, SG_SET_TIMEOUT, 0xbf84a834)    = 0
ioctl(3, SG_GET_VERSION_NUM, 0x8062524) = 0
ioctl(3, SG_GET_SCSI_ID, 0xbf84a7f0)    = -1 ENOTTY (Inappropriate ioctl for 
device)

Is this an intentional change?

regards,
Jörg

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Re: 2.6.23-rcX SG_GET_SCSI_ID regression?

[Joerg Platte]

Am Mittwoch, 3. Oktober 2007 schrieb Joerg Platte:
Hi,

> 2.6.22.8:
> open("/dev/scanner", O_RDWR|O_NONBLOCK|O_EXCL) = 3
> ioctl(3, SG_SET_TIMEOUT, 0xbfe40624)    = 0
> ioctl(3, SG_GET_VERSION_NUM, 0x8063fa4) = 0
> ioctl(3, SG_GET_SCSI_ID, 0xbfe405e0)    = 0
>
> 2.6.23-rc9:
> open("/dev/scanner", O_RDWR|O_NONBLOCK|O_EXCL) = 3
> ioctl(3, SG_SET_TIMEOUT, 0xbf84a834)    = 0
> ioctl(3, SG_GET_VERSION_NUM, 0x8062524) = 0
> ioctl(3, SG_GET_SCSI_ID, 0xbf84a7f0)    = -1 ENOTTY (Inappropriate ioctl
> for device)

After some reboots and tests I discovered, that this error occurs only when 
the scanner was turned off during system boot and was discovered later by 
invoking the following script:
for device in /sys/class/scsi_host/host*/scan ; do
        echo "0 - -" > $device
done
With 2.6.22 and before the scanner was fully functional when discovered by a 
bus rescan.

regards,
Jörg

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