Re: Bug 196559: xhci_hcd: kernel panic using thunderbolt dell dock TB16 on 4.12.4

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The bug is still present in kernel 4.13. The panic logs look pretty much the same as with 4.12.4. I have attached the pstore and journald messages to the bugzilla bug report just in case.

I reverted commit 5cc9b698a494827 on top of v4.13 and I can confirm that it fixes the problem.

Jose

On 09/06/2017 01:16 AM, Greg KH wrote:
On Tue, Sep 05, 2017 at 03:11:40PM -0600, Jose Marino wrote:
Hi,
I found a way to reliably trigger this bug:
- Boot laptop
- Plug in dock (with external display connected to dock)
- Send output to external display
- Suspend

I did a bisect between 4.12.3 and 4.12.4 and here is the result:
5cc9b698a494827b15f74ef70a31d7911d00e52a is the first bad commit
commit 5cc9b698a494827b15f74ef70a31d7911d00e52a
Author: Jiahau Chang <jiahau@xxxxxxxxx>
Date:   Thu Jul 20 14:48:27 2017 +0300

     xhci: Bad Ethernet performance plugged in ASM1042A host

     commit 9da5a1092b13468839b1a864b126cacfb72ad016 upstream.

     When USB Ethernet is plugged in ASMEDIA ASM1042A xHCI host, bad
     performance was manifesting in Web browser use (like download
     large file such as ISO image). It is known limitation of
     ASM1042A that is not compatible with driver scheduling,
     As a workaround we can modify flow control handling of ASM1042A.
     The register we modify is changes the behavior

     [use quirk bit 28, usleep_range 40-60us, empty non-pci function
-Mathias]
     Signed-off-by: Jiahau Chang <Lars_chang@xxxxxxxxxxxxxx>
     Signed-off-by: Ian Pilcher <arequipeno@xxxxxxxxx>
     Signed-off-by: Mathias Nyman <mathias.nyman@xxxxxxxxxxxxxxx>
     Signed-off-by: Greg Kroah-Hartman <gregkh@xxxxxxxxxxxxxxxxxxx>

:040000 040000 876e102bde34482389d90d3394c369557a6e0d98
a84e4099274ef8c0eb35d70fbe69013f011c7c78 M	drivers



Hm, but 4.13 works properly?  That's odd, maybe it's time to just mark
4.12.y as end-of-life and move on? :)

thanks,

greg k-h

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