pending patch breaks xgene-ahci

Bug Description

The following patch queued in trusty master-next introduces a regression in the xgene-ahci driver.

commit 65e4c0de0b260fbd756d14f4df3bed694dcc52c0
Author: Dan Williams <email address hidden>
Date: Thu Apr 17 11:48:21 2014 -0700

libata/ahci: accommodate tag ordered controllers

BugLink: http://bugs.launchpad.net/bugs/1333837

commit 8a4aeec8d2d6a3edeffbdfae451cdf05cbf0fefd upstream.

This issue is documented here:
http://marc.info/?l=linux-kernel&m=140195842716315&w=2

There are patches in flight that resolve this problem - these are what I've been tested with.
http://kernel.ubuntu.com/git?p=dannf/ubuntu-utopic-hyperscale.git;a=commit;h=bf8081785ddecfab928ced266cfb1092440da9c9
http://kernel.ubuntu.com/git?p=dannf/ubuntu-utopic-hyperscale.git;a=commit;h=9d182209b4c6be7cde703e235e99177215202366

These patches also resolve the issue - but they are not yet upstream, so I'm assuming that a revert for now is the more maintainable solution.

This bug is awaiting verification that the kernel in -proposed solves the problem. Please test the kernel and update this bug with the results. If the problem is solved, change the tag 'verification-needed-trusty' to 'verification-done-trusty'.

If verification is not done by 5 working days from today, this fix will be dropped from the source code, and this bug will be closed.

See https://wiki.ubuntu.com/Testing/EnableProposed for documentation how to enable and use -proposed. Thank you!

I can boot from disk, so yeah, it's good :)

This bug was fixed in the package linux - 3.13.0-32.57

---------------
linux (3.13.0-32.57) trusty; urgency=low

[ Upstream Kernel Changes ]

* l2tp: Privilege escalation in ppp over l2tp sockets
- LP: #1341472
- CVE-2014-4943

linux (3.13.0-32.56) trusty; urgency=low

[ Luis Henriques ]

* Merged back Ubuntu-3.13.0-30.55 security release
* Revert "x86_64,ptrace: Enforce RIP <= TASK_SIZE_MAX (CVE-2014-4699)"
- LP: #1337339
* Release Tracking Bug
- LP: #1338524

[ Upstream Kernel Changes ]

* ptrace,x86: force IRET path after a ptrace_stop()
- LP: #1337339
- CVE-2014-4699
* hpsa: add new Smart Array PCI IDs (May 2014)
- LP: #1337516

linux (3.13.0-31.55) trusty; urgency=low

[ Luis Henriques ]

* Release Tracking Bug
- LP: #1336278

[ Andy Whitcroft ]

* [Config] switch hyper-keyboard to virtual
- LP: #1325306
* [Packaging] linux-udeb-flavour -- standardise on linux prefix

[ dann frazier ]

* [Config] CONFIG_GPIO_DWAPB=m
- LP: #1334823

[ Feng Kan ]

* SAUCE: (no-up) arm64: dts: Add Designware GPIO dts binding to APM
X-Gene platform
- LP: #1334823

[ John Johansen ]

* SAUCE: (no-up) apparmor: fix apparmor spams log with warning message
- LP: #1308761

[ Kamal Mostafa ]

* [Config] updateconfigs ACPI_PROCFS_POWER=y after v3.13.11.4 rebase

[ Loc Ho ]

* SAUCE: (no-up) phy-xgene: Use correct tuning for Mustang
- LP: #1335636

[ Michael Ellerman ]

* SAUCE: (no-up) powerpc/perf: Ensure all EBB register state is cleared
on fork()
- LP: #1328914

[ Ming Lei ]

* Revert "SAUCE: (no-up) rtc: Add X-Gene SoC Real Time Clock Driver"
- LP: #1274305

[ Suman Tripathi ]

* SAUCE: (no-up) libahci: Implement the function ahci_restart_engine to
restart the port dma engine.
- LP: #1335645
* SAUCE: (no-up) ata: Fix the dma state machine lockup for the IDENTIFY
DEVICE PIO mode command.
- LP: #1335645

[ Tim Gardner ]

* [Config] CONFIG_POWERNV_CPUFREQ=y for powerpc, ppc64el
- LP: #1324571
* [Debian] Add UTS_UBUNTU_RELEASE_ABI to utsrelease.h
- LP: #1327619
* [Config] CONFIG_HAVE_MEMORYLESS_NODES=y
- LP: #1332063
* [Config] CONFIG_HID_RMI=m
- LP: #1305522

[ Upstream Kernel Changes ]

* Revert "offb: Add palette hack for little endian"
- LP: #1333430
* Revert "net: mvneta: fix usage as a module on RGMII configurations"
- LP: #1333837
* Revert "USB: serial: add usbid for dell wwan card to sierra.c"
- LP: #1333837
* Revert "macvlan : fix checksums error when we are in bridge mode"
- LP: #1333838
* serial: uart: add hw flow control support configuration
- LP: #1328295
* mm/numa: Remove BUG_ON() in __handle_mm_fault()
- LP: #1323165
* Tools: hv: Handle the case when the target file exists correctly
- LP: #1306215
* Documentation/devicetree/bindings: add documentation for the APM X-Gene
SoC RTC DTS binding
- LP: #1274305
* drivers/rtc: add APM X-Gene SoC RTC driver
- LP: #1274305
* arm64: add APM X-Gene SoC RTC DTS entry
- LP: #1274305
* powerpc/perf: Add Power8 cache & TLB events
- LP: #1328914
* powerpc/perf: Configure BH...

This bug was fixed in the package linux - 3.13.0-35.62

---------------
linux (3.13.0-35.62) trusty; urgency=low

[ Joseph Salisbury ]

* Release Tracking Bug
- LP: #1357148

[ Brad Figg ]

* Start new release

[ dann frazier ]

* SAUCE: (no-up) Fix build failure on arm64
- LP: #1353657
* [debian] Allow for package revisions condusive for branching

[ David Henningsson ]

* SAUCE: Call broadwell specific functions from the hda driver
- LP: #1317865

[ Edward Lin ]

* SAUCE: (no-up) Add use native backlight quirk for Dell Inspiron
5547/5447
- LP: #1332437

[ Imre Deak ]

* SAUCE: drm/i915: move power domain init earlier during system resume
- LP: #1353405

[ Jani Nikula ]

* SAUCE: drm/i915: use lane count and link rate from VBT as minimums for
eDP
- LP: #1338582
* SAUCE: drm/i915/dp: force eDP lane count to max available lanes on BDW
- LP: #1338582
* SAUCE: drm/i915: provide interface for audio driver to query cdclk
- LP: #1188091
* SAUCE: drm/i915: demote opregion excessive timeout WARN_ONCE to
DRM_INFO_ONCE
- LP: #1351014

[ Joseph Salisbury ]

* [Config] updateconfigs after Linux 3.13.11.6 updates

[ Luis Henriques ]

* Revert "[Packaging] linux-udeb-flavour -- standardise on linux prefix"

[ Ming Lei ]

* Revert "SAUCE: (no-up) ata: Fix the dma state machine lockup for the
IDENTIFY DEVICE PIO mode command."
- LP: #1335645

[ Paulo Zanoni ]

* SAUCE: drm/i915: consider the source max DP lane count too
- LP: #1338582

[ Tim Gardner ]

* [Config] CONFIG_GPIO_SYSFS=y
- LP: #1342153
* [Config] CONFIG_KEYS_DEBUG_PROC_KEYS=y
- LP: #1344405
* [Config] updateconfigs
* [Config] CONFIG_SCSI_IPR_TRACE=y, CONFIG_SCSI_IPR_DUMP=y
- LP: #1343109
* [Config] CONFIG_CONTEXT_TRACKING_FORCE=n
- LP: #1349028

[ Timo Aaltonen ]

* SAUCE: Fix a typo in hda i915_bdw support.
- LP: #1343140

[ Upstream Kernel Changes ]

* Revert "net/mlx4_en: Fix bad use of dev_id"
- LP: #1347012
* Revert "ACPI / AC: Remove AC's proc directory."
- LP: #1356913
* Revert "mac80211: move "bufferable MMPDU" check to fix AP mode scan"
- LP: #1356913
* mm, pcp: allow restoring percpu_pagelist_fraction default
- LP: #1347088
* net: Fix permission check in netlink_connect()
- LP: #1312989
* netlink: Rename netlink_capable netlink_allowed
- LP: #1312989
* net: Move the permission check in sock_diag_put_filterinfo to
packet_diag_dump
- LP: #1312989
* net: Add variants of capable for use on on sockets
- LP: #1312989
* net: Add variants of capable for use on netlink messages
- LP: #1312989
* net: Use netlink_ns_capable to verify the permisions of netlink
messages
- LP: #1312989
* netlink: Only check file credentials for implicit destinations
- LP: #1312989
* igb: fix stats for i210 rx_fifo_errors
- LP: #1338893
* HID: use multi input quirk for 22b9:2968
- LP: #1339567
* crypto/nx: disable NX on little endian builds
- LP: #1338666
* ACPI / video: Add Dell Inspiron 5737 to the blacklist
- LP: #1250401
* Input: elantech - deal with clickpads reportin...