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    SubjectRe: [BUG] 2.6.32 - Sddr-09 SM reader resets endlessly
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    On Saturday 05 December 2009 16:34:26 Alan Stern wrote:
    > On Sat, 5 Dec 2009, Andries E. Brouwer wrote:
    >
    > > > Andries, do you have any idea what's going on? Evidently this device
    > > > doesn't accept the protocol used by the sddr09 driver.
    > >
    > > Hi Alan,
    > >
    > > Sorry, no - I have no memory and worked on these USB drivers
    > > years ago. Forgot all details. Also my last sddr09 device broke
    > > some time ago.
    > >
    > > Looking at my old files I do not see the Vendor Id 0781, so maybe
    > > this is a device I never encountered.
    > > These old files also discuss some trickery with multi-lun devices
    > > where the driver needed depends on the lun. This is not a reader
    > > of multiple types of card?
    > >
    > > Many of my SM readers worked with either sddr09 or sddr55.
    > > Does the unusual devices section today say that such a device
    > > needs sddr09?
    > >
    > > Found a 2.6.31 source tree. Yes,
    > >
    > > UNUSUAL_DEV( 0x0781, 0x0200, 0x0000, 0x9999,
    > > "Sandisk",
    > > "ImageMate SDDR-09",
    > > US_SC_SCSI, US_PR_EUSB_SDDR09, usb_stor_sddr09_init,
    > > 0),
    > >
    > > Is it known who added this? Is 0208 in the interval of known devices
    > > for which sddr09 works?
    >
    > The entry was added before 2.5.0 (more than 7 years ago), and I can't
    > tell who added it. And the entry doesn't say anything about DPCM
    > (multiple-LUN trickery).
    >
    > Ed, it looks like you're out of luck. Unless you can figure out the
    > vendor-specific protocol used by that device, and modify the sddr09
    > driver to support it, you won't be able to use the device under Linux.
    >
    > Or am I completely off base? Did it used to work with an earlier
    > kernel? If it did, can you get a usbmon trace of it?

    This is a regression. The device works fine in 2.6.31 something
    in .32 breaks it.

    Ed


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