Greg KH <gregkh <at> suse.de> writes:

> 
> From: David Hollis <dhollis <at> davehollis.com>
> 
> USB: Add device id's for Novatel Wireless CDMA wireless PC card.
>      The Novatel CDMA card behaves the same as the AirPrime by providing
>      a USB serial port.
> 
> Signed-off-by: David Hollis <dhollis <at> davehollis.com>
> Signed-off-by: Greg Kroah-Hartman <gregkh <at> suse.de>
> 

Now that this driver is in the kernel (I'm running 2.6.15), there are some
problems I'd like to report when using it.  Basically, Junxion found this
problem as well and posted a patch
[http://www.junxion.com/opensource/linux_highspeed_usbserial.html].  I know it
solves the problem, but the solution may be worse than the disease.

Here is the problem, when you are moving "large" amounts of data or have a very
high packet rate then the driver starts wigging out.  The device will send data
to the terminal, but it cannot recieve data - or visa versa.  The only way to
recover from this is disconnect the device and reconnect it.  The Junxion patch
simply increases the size of the buffer for the driver.  I don't know if the
reason this is needed is a problem with the Qualcomm EVOD Modem device itself or
there is a bug in the serial driver.  My money is on the former ;)

So, is my real question is: Is this patch the solution?  Is there a betetr
solution?  I have tried to get the data sheet for the EVDO Qualcomm chip, but I
can't seem to find it or get anyone to talk to me.  What's the next step?




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