patchAVR Downloader/UploaDEr - Patches: patch #7635, Fix avrftdi.c/h Random...


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patch #7635: Fix avrftdi.c/h Random lockup/moved globals to private data against 5.11.1

Submitted by:  Doug S <rickyrockrat>
Submitted on:  Sun 16 Oct 2011 04:23:53 AM UTC  
Category:  None Priority:  5 - Normal
Status:  Duplicate Privacy:  Public
Assigned to:  Rene Liebscher <rliebscher> Open/Closed:  Closed

Sun 05 Feb 2012 12:27:11 PM UTC, comment #1:

see also patch #7718 Merge global data of avrftdi in a private data structure

Rene Liebscher <rliebscher>
Project MemberIn charge of this item.
Sun 16 Oct 2011 04:23:53 AM UTC, original submission:

I found a strange lockup with avrftdi on writes - verifys and reads work with no problem. I had a hardware change (new mother board) so I thought at first that was it, but it happens on at least two different computers.

At random places while writting, it will lock up and loop forever.

strace gives this (forever, AFAIK):

ioctl(3, USBDEVFS_REAPURBNDELAY, 0x7fff2a91b1e8) = -1 EAGAIN (Resource temporarily unavailable)

Removing the purge buffers seems to fix the problem. I'm not sure what all ramifications the purge has, since I didn't bother to delve into the ftdi code, but I found one other example, and I noticed they had found this problem and removed the purge call as well.

This patch also moves the globals to a private structure, as per Joerg's last request to do so.

Doug S <rickyrockrat>


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    Follow 4 latest changes.

    Date Changed by Updated Field Previous Value => Replaced by
    02/11/2012 rliebscher StatusNone => Duplicate
        Assigned toNone => rliebscher
        Open/ClosedOpen => Closed
    10/16/2011 rickyrockrat Attached File- => Added avrdude-fixlock-privatedata-5.11.1.patch, #24156

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