linux-stable.git/arch/arm, branch v4.1.2

ARM: mvebu: fix suspend to RAM on big-endian configurations

2015-07-10T16:49:35+00:00

commit 2f5bc307be2480ba89e4c5d118f406f04a4a7299 upstream.

The current Armada XP suspend to RAM implementation, as added in
commit 27432825ae19f ("ARM: mvebu: Armada XP GP specific
suspend/resume code") does not handle big-endian configurations
properly: the small bit of assembly code putting the DRAM in
self-refresh and toggling the GPIOs to turn off power forgets to
convert the values to little-endian.

This commit fixes that by making sure the two values we will write to
the DRAM controller register and GPIO register are already in
little-endian before entering the critical assembly code.

Signed-off-by: Thomas Petazzoni 
Fixes: 27432825ae19f ("ARM: mvebu: Armada XP GP specific suspend/resume code")
Signed-off-by: Greg Kroah-Hartman

ARM: tegra20: Store CPU "resettable" status in IRAM

2015-07-10T16:49:34+00:00

commit 4d48edb3c3e1234d6b3fcdfb9ac24d7c6de449cb upstream.

Commit 7232398abc6a ("ARM: tegra: Convert PMC to a driver") changed tegra_resume()
location storing from late to early and, as a result, broke suspend on Tegra20.
PMC scratch register 41 is used by tegra LP1 resume code for retrieving stored
physical memory address of common resume function and in the same time used by
tegra20_cpu_shutdown() (shared by Tegra20 cpuidle driver and platform SMP code),
which is storing CPU1 "resettable" status. It implies strict order of scratch
register usage, otherwise resume function address is lost on Tegra20 after
disabling non-boot CPU's on suspend. Fix it by storing "resettable" status in
IRAM instead of PMC scratch register.

Signed-off-by: Dmitry Osipenko 
Fixes: 7232398abc6a (ARM: tegra: Convert PMC to a driver)
Signed-off-by: Thierry Reding 
Signed-off-by: Greg Kroah-Hartman

ARM: kvm: psci: fix handling of unimplemented functions

2015-07-10T16:49:34+00:00

commit e2d997366dc5b6c9d14035867f73957f93e7578c upstream.

According to the PSCI specification and the SMC/HVC calling
convention, PSCI function_ids that are not implemented must
return NOT_SUPPORTED as return value.

Current KVM implementation takes an unhandled PSCI function_id
as an error and injects an undefined instruction into the guest
if PSCI implementation is called with a function_id that is not
handled by the resident PSCI version (ie it is not implemented),
which is not the behaviour expected by a guest when calling a
PSCI function_id that is not implemented.

This patch fixes this issue by returning NOT_SUPPORTED whenever
the kvm PSCI call is executed for a function_id that is not
implemented by the PSCI kvm layer.

Cc: Christoffer Dall 
Acked-by: Sudeep Holla 
Signed-off-by: Lorenzo Pieralisi 
Signed-off-by: Marc Zyngier 
Signed-off-by: Greg Kroah-Hartman

arm: KVM: force execution of HCPTR access on VM exit

2015-07-10T16:49:34+00:00

commit 85e84ba31039595995dae80b277378213602891b upstream.

On VM entry, we disable access to the VFP registers in order to
perform a lazy save/restore of these registers.

On VM exit, we restore access, test if we did enable them before,
and save/restore the guest/host registers if necessary. In this
sequence, the FPEXC register is always accessed, irrespective
of the trapping configuration.

If the guest didn't touch the VFP registers, then the HCPTR access
has now enabled such access, but we're missing a barrier to ensure
architectural execution of the new HCPTR configuration. If the HCPTR
access has been delayed/reordered, the subsequent access to FPEXC
will cause a trap, which we aren't prepared to handle at all.

The same condition exists when trapping to enable VFP for the guest.

The fix is to introduce a barrier after enabling VFP access. In the
vmexit case, it can be relaxed to only takes place if the guest hasn't
accessed its view of the VFP registers, making the access to FPEXC safe.

The set_hcptr macro is modified to deal with both vmenter/vmexit and
vmtrap operations, and now takes an optional label that is branched to
when the guest hasn't touched the VFP registers.

Reported-by: Vikram Sethi 
Signed-off-by: Marc Zyngier 
Signed-off-by: Greg Kroah-Hartman

ARM: mvebu: update Ethernet compatible string for Armada XP

2015-07-10T16:49:32+00:00

[ Upstream commit ea3b55fe83b5fcede82d183164b9d6831b26e33b ]

This patch updates the Ethernet DT nodes for Armada XP SoCs with the
compatible string "marvell,armada-xp-neta".

Signed-off-by: Simon Guinot 
Fixes: 77916519cba3 ("arm: mvebu: Armada XP MV78230 has only three Ethernet interfaces")
Cc:  # v3.8+
Acked-by: Gregory CLEMENT 
Reviewed-by: Thomas Petazzoni 
Signed-off-by: David S. Miller 
Signed-off-by: Greg Kroah-Hartman

ARM: clk-imx6q: refine sata's parent

2015-07-10T16:49:27+00:00

commit da946aeaeadcd24ff0cda9984c6fb8ed2bfd462a upstream.

According to IMX6D/Q RM, table 18-3, sata clock's parent is ahb, not ipg.

Signed-off-by: Sebastien Szymanski 
Reviewed-by: Fabio Estevam 
Signed-off-by: Shawn Guo 
[dirk.behme: Adjust moved file]
Signed-off-by: Dirk Behme 
Signed-off-by: Greg Kroah-Hartman

ARM: dts: sunxi: Adjust touchscreen compatible for sun5i and later

2015-07-10T16:49:27+00:00

commit 8bf1b9b3d90194a174493febc731f7783f2adf1a upstream.

The touchscreen controller in the A13 and later has a different temperature
curve than the one in the original A10, change the compatible for the A13 and
later so that the kernel will use the correct curve.

Reported-by: Tong Zhang 
Signed-off-by: Hans de Goede 
Signed-off-by: Maxime Ripard 
Signed-off-by: Hans de Goede 
Signed-off-by: Greg Kroah-Hartman

Merge tag 'omap-for-v4.1/fixes-rc6' of git://git.kernel.org/pub/scm/linux/kernel/git/tmlind/linux-omap into fixes

2015-06-08T17:32:55+00:00

Merge omap fixes for v4.1, urgent fix to avoid potential hardware damage From Tony Lindgren:

Omap fixes for the -rc cycle, including a fix for potential hardware
breakage on BeagleBones:

- BeagleBones don't support RTC-only mode, it can cause hardware
  damage if system-power-controller is specified without
  ti,pmic-shutdown-controller

- Fix a recent regression to am3517 SoCs caused by the recent clock
  move that was not noticed until now despite automated boot
  testing

- Fix a regression for n900 touchscreen triggered by recent
  recent input changes

- Fix compatible property for dm816x USB to avoid errors with
  USB Ethernet

- Fix oops for omap3 when built with CONFIG_THUMB2_KERNEL

* tag 'omap-for-v4.1/fixes-rc6' of git://git.kernel.org/pub/scm/linux/kernel/git/tmlind/linux-omap:
  ARM: dts: am335x-boneblack: disable RTC-only sleep to avoid hardware damage
  ARM: dts: AM35xx: fix system control module clocks
  ARM: dts: Fix n900 dts file to work around 4.1 touchscreen regression on n900
  ARM: dts: Fix dm816x to use right compatible flag for MUSB
  ARM: OMAP3: Fix booting with thumb2 kernel

ARM: dts: am335x-boneblack: disable RTC-only sleep to avoid hardware damage

2015-06-01T19:48:23+00:00

Avoid entering "RTC-only mode" at poweroff. It is unsupported by most
versions of BeagleBone, and risks hardware damage.

The damaging configuration is having system-power-controller
without ti,pmic-shutdown-controller.

Reported-by: Matthijs van Duin 
Tested-by: Matthijs van Duin 
Signed-off-by: Robert Nelson 
Cc: Tony Lindgren 
Cc: Felipe Balbi 
Cc: Johan Hovold 
[Matthijs van Duin: added explanatory comments]
Signed-off-by: Matthijs van Duin 
Fixes: http://bugs.elinux.org/issues/143
Cc: stable@vger.kernel.org # v3.12+
[tony@atomide.com: updated comments with the hardware breaking info]
Signed-off-by: Tony Lindgren

ARM: dts: AM35xx: fix system control module clocks

2015-06-01T17:29:35+00:00

New system control module layout for omap3 overlooked parts of the am35xx
configuration. Basically the am35xx clocks were not converted to use the
changed offsets, which caused weird boot warnings. The errors were not
fatal so far, so they were not caught earlier. Fixed by applying the
proper offsets for the AM35xx scm clocks.

Fixes: b8845074cf ("ARM: dts: omap3: add minimal l4 bus layout with...")

Signed-off-by: Tero Kristo 
Reported-by: Jeroen Hofstee 
Cc: Paul Walmsley 
Tested-by: Jeroen Hofstee 
Signed-off-by: Tony Lindgren