On Mon, Aug 30, 2004 at 01:56:57AM -0500, Al Borchers wrote: > Greg -- > > Here is an additional patch for pl2303 in 2.6.9-rc1, > to be applied after my previous circular buffer patch. > This patch waits for the buffer to drain on close and > then clears the buffer. In addition to the obvious > features, this also fixes a bug where closing a port > with a full buffer would accidentally disable writes > when the port was re-opened. > > The original pl2303 could lose data that was still going > out the port on close, and even this patch only solves > the problem completely for data rates of 1200 bps and > above. > > Waiting for data to drain from the circular buffer is > easy, but the problem is waiting for data to drain from > the 256 byte hardware buffer on the device. I don't know > how much data is in the hardware buffer, so I just wait > long enough for a potentially full hardware buffer to > drain, but I don't want to wait that long for low data > rates if the buffer isn't full. There is probably some > way to query the pl2303 to find out how much data is in > its hardware buffer, maybe snooping would reveal that. > > Anyway, if you take the circular buffer patch, please > apply this one, too.
Applied, thanks. greg k-h ------------------------------------------------------- This SF.Net email is sponsored by BEA Weblogic Workshop FREE Java Enterprise J2EE developer tools! Get your free copy of BEA WebLogic Workshop 8.1 today. http://ads.osdn.com/?ad_id=5047&alloc_id=10808&op=click _______________________________________________ [EMAIL PROTECTED] To unsubscribe, use the last form field at: https://lists.sourceforge.net/lists/listinfo/linux-usb-devel
