RE: MP3 device device descriptor read error

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On Tue, 25 Jan 2011, Jasper Mackenzie wrote:

> > In other words, add in the US_FL_MAX_SECTORS_64 flag. That did the trick. Getting great speeds (hdparm reacons 80mb/s). Thank you.

Okay, I'll submit the patch for inclusion in the next -stable kernel 
release.

> I had real trouble using your patch and only just noticed the problem USB_SC... instead of US_SC...here is the amended patch that should work:
> Index: usb-2.6/drivers/usb/storage/unusual_devs.h
> ===================================================================
> --- usb-2.6.orig/drivers/usb/storage/unusual_devs.h
> +++ usb-2.6/drivers/usb/storage/unusual_devs.h
> @@ -1872,6 +1872,12 @@ UNUSUAL_DEV( 0x1908, 0x3335, 0x0200, 0x0
> US_SC_DEVICE, US_PR_DEVICE, NULL,
> US_FL_NO_READ_DISC_INFO ),
> 
> +UNUSUAL_DEV( 0x1e74, 0x4621, 0x0000, 0x0000,
> +        "Coby Electronics",
> +        "MP3 Player",
> +        USB_SC_DEVICE, USB_PR_DEVICE, NULL,
> +        US_FL_BULK_IGNORE_TAG | US_FL_MAX_SECTORS_64 ),
> +

Right.  The flag names were changed recently, and I didn't know whether
you were running an older or newer kernel version.

Alan Stern

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