Re: usb-serial.c question - potential Memory fault

On Mon, Jul 30, 2007 at 07:10:55AM +0200, [email protected] wrote:
> Hi Greg,
> 
> After a new complete reading of my code against usb-serial.c, I finally
> found ( I hope ) my problem.
> In usb-serial.c, when bulk_in/out buffers are initialized, each ?buffer size
> are the same as the wMaxPacketSize given by the endpoint.
> So, in my case, my device have a value of 64 bytes and I send and receive
> bulk data that might have 256 bytes length !!! And like pl2303, I just copy
> the user data to port->write_urb->transfer_buffer.
> For all driver that use usb-serial for the probe function, this can be a
> problem (like for me). I have checked for example the pl2303 that never
> check this value before the memcpy.

Why is this a problem for you?  You can use any size buffer you want if
you wish to send more data than what the usb-serial core provides for
you.  Lots of other drivers do that today.

thanks,

greg k-h

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