** Also affects: linux (Ubuntu Vivid)
Importance: Undecided
Status: New
** Also affects: linux (Ubuntu Wily)
Importance: Undecided
Status: New
** Also affects: linux (Ubuntu Trusty)
Importance: Undecided
Status: New
** Changed in: linux (Ubuntu Trusty)
Status: New => Fix Committed
** Changed in: linux (Ubuntu Vivid)
Status: New => Fix Committed
** Changed in: linux (Ubuntu Wily)
Status: New => Fix Committed
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https://bugs.launchpad.net/bugs/1518816
Title:
xhci: Workaround to get Intel xHCI reset working more reliably
Status in linux package in Ubuntu:
Triaged
Status in linux source package in Trusty:
Fix Committed
Status in linux source package in Vivid:
Fix Committed
Status in linux source package in Wily:
Fix Committed
Bug description:
SRU Justification:
On all of Intel's shipping xHCI platforms, including both servers and
clients, the controller can cause the shutdown process to hang.
This is because existing Intel xHCI controllers require a delay of 1
mS,after setting the CMD_RESET bit in command register, before accessing any HC
registers. This allows the HC to complete the reset operation and be ready for
HC register access.
Fix:
Patch in 4.4-rc2
commit a5964396190d0c40dd549c23848c282fffa5d1f2
Author: Rajmohan Mani <[email protected]>
Date: Wed Nov 18 10:48:20 2015 +0200
xhci: Workaround to get Intel xHCI reset working more reliably
Regression Potential: Just add a 1ms delay for xhci_reset, so
regressions are very unlikely.
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