Date: Sun, 28 Nov 2004 20:54:30 -0800 From: Julian Elischer <julian@elischer.org> To: usb@freebsd.org Subject: working on EHCI bug in 4.x Message-ID: <41AAAB86.80300@elischer.org>
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general report to the list.. I'm working on a bug that is hitting my employer in FBSD4.10 and may (not sure yet) also exist in 5.x/6. (Need to get a 5.x test machine with EHCI). The symptom is that an IO timeout removes the 'xfer' from the interface but fails to handshake with the hardware correctly, resulting in the hardware DMA-ing to the buffer which has been added back to the free list. The code in question is the same in 4/5/6 so it may be that it is everywhere.. I now undersand the EHCI interface enough to say it is not an OBVIOUS bug as teh code SEEMS to be doing the handshake correctly. *sigh* anyhow.. back to your regularly scheduled hacking.. Anyone with ideas should feel free to speak up :-)
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