Could you turn on USB Mass Storage verbose debugging and send a log of the
simplest case tht does something strange?
Matt
On Mon, May 14, 2001 at 05:18:12PM -0500, Bob McElrath wrote:
> I'm using the usb-storage driver to read/write an MMC card using the
> SanDisk ImageMate (SDDR12). Under kernel 2.4.4, and usb-uhci I'm having
> the following problems:
>
> * The application hangs when it closes the filehandle. Currently I
> fh = open("/dev/sdc", O_RDWR) the device, write a bunch of stuff, and
> then close(fh). Upon close the program hangs in the "D" state as
> reported by ps (forever...). The program worked with older kernels...
> The program also works fine if no data is written.
>
> * When it did work, the close(fh) would also hang for several seconds,
> but eventually return. My program transfers files to the MMC, and
> when transferring the file, the orange light on the device blinks
> rapidly. When the transferring is done, and the filehandle is closed,
> the light on the device turns of for several seconds. I've tried
> inserting ioctl(fh, SCSI_IOCTL_SYNC) in several places, but this
> didn't seem to have any affect. The amount of time it hung was
> independent of how much data was transferred, unless no data was
> written, then there was no hang.
>
> So in either case it seems like something funny is happening when the
> device is closed, and data was written. Does anyone have any ideas off
> the top of their heads? Suggestions as to how I should go about
> tracking this down?
>
> Does anyone else actually use the SDDR12 under linux, or am I the only
> one? ;)
>
> The software in question is mjmmc, part of mj-tools
> (http://www.sourceforge.net/projects/mj-tools)
>
> Thanks,
> -- Bob
>
> Bob McElrath ([EMAIL PROTECTED])
> Univ. of Wisconsin at Madison, Department of Physics
--
Matthew Dharm Home: [EMAIL PROTECTED]
Maintainer, Linux USB Mass Storage Driver
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