Control: tag -1 moreinfo On Fri, 2015-12-25 at 04:26 +1030, Ron wrote: > Source: linux > Version: 3.16.7-ckt20-1 > Severity: important > > Hi, > > While testing the code from here: http://www.bitbabbler.org I ran into a > problem on recently updated Jessie systems where devices plugged into an > XHCI port would always time out between transfers when the transfer size > was larger than 16kB. And since it wasn't doing that a few weeks ago, I > went digging :) > > All the following was tested on amd64. > > I can confirm that 3.16.7-ckt17-1 does not have this problem and it's a > newly introduced regression that's first seen with the ckt20 patch set. > I can also confirm that 4.2.0-0.bpo.1 from jessie-backports does not > have this problem. > > The cause appears to be a botched backport of > e210c422b6fdd2dc123bedc588f399aefd8bf9de (from Linus' repo) because I can > also confirm that a locally built kernel from the 3.16.7-ckt20-1 source > with only that patch reverted also does not have this problem.
Are you seeing any error messages in the kernel log? Do they look anything like those in <https://bugs.debian.org/809430>? If not, please send them. > If it's really important that we have that patch for some reason, then > it looks like (at least) 40a3b775f49c2784c96b19170fd2478e5e5511a1 would > also need to be backported too, and maybe some other changes that effect > this as well. [...] Have you tried applying that on top of the current stable kernel source? It doesn't look like a dependency to me. Ben. -- Ben Hutchings All the simple programs have been written, and all the good names taken.
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