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Fixes bugs #38659 and #38831

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Apparently, doing too large read/write I/O on the MPSSE fills up the RX Buffer
of the chip, resulting in STALL/NAK of additional transactions of an OUT request.
Since the OUT request is issued synchronously, an appropriate IN request cannot
be issued, resulting in a deadlock.
This problem is handled by submitting small enough OUT requests, that will not
fill up the RX buffer and interleaving them with IN requests.


git-svn-id: svn://svn.savannah.nongnu.org/avrdude/trunk/avrdude@1142 81a1dc3b-b13d-400b-aceb-764788c761c2
This commit is contained in:
Hannes Weisbach
2013-04-27 21:49:27 +00:00
parent 295b6f3711
commit c413afc9b1
2 changed files with 65 additions and 29 deletions
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@@ -7,6 +7,10 @@
error messages. avrftdi_print is changed so that a message is printed when
the verbosity level is greater or equal the message level, to have always-on
messages.
Fix a bug where the RX fifo of the FTDI chip is full, resulting in STALL/NAK
of the ongoing OUT request and subsequently timeout, because an IN request
cannot be issued due to the synchronous part of libftdi. This should fix
#38831 and #38659.
2013-04-25 Joerg Wunsch <j.gnu@uriah.heep.sax.de>