usb/83439: Too Strict Constraint for USB-CDROM(ATAPI Protocol)

intron intron at
Thu Jul 14 10:10:23 GMT 2005

>Number:         83439
>Category:       usb
>Synopsis:       Too Strict Constraint for USB-CDROM(ATAPI Protocol)
>Confidential:   no
>Severity:       non-critical
>Priority:       medium
>Responsible:    freebsd-usb
>State:          open
>Class:          sw-bug
>Submitter-Id:   current-users
>Arrival-Date:   Thu Jul 14 10:10:22 GMT 2005
>Originator:     intron
>Release:        5.4-STABLE
Tsinghua University
FreeBSD 5.4-STABLE FreeBSD 5.4-STABLE #0: Sun Jul  3 01:36:25 CST 2005     root at  i386
      I cannot use cdcontrol(1) to command USB-CDROM to play audio CD. My USB-IDE adapter is "USB TO IDE(0x0701), Genesys Logic(0x05e3)". CDROM is "ASUS CRW-5232AS 1.0".
      cdcontrol -f /dev/cd1 play
      cdcontrol -f /dev/cd1 play 1

      In the function umass_atapi_transform() in /usr/src/sys/dev/usb/umass.c, too strict constraint for the transform from userland program to adapter. Actually, if I allow command 0xa5 and 0x47, everything is all right.

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