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691,473 commits

Author SHA1 Message Date
Krzysztof Kozlowski
e465007a7a ARM: EXYNOS: Move pm_domains driver to drivers/soc/samsung
Exynos PM domains driver does not have mach-specific dependencies so it
can be safely moved out of arm/mach-exynos to drivers/soc. This in
future will allow re-using it on ARM64 boards.

Signed-off-by: Krzysztof Kozlowski <k.kozlowski@samsung.com>
Reviewed-by: Javier Martinez Canillas <javier@osg.samsung.com>
2016-05-30 09:12:49 +02:00
Shmulik Ladkani
0e6b525982 net: l2tp: Make l2tp_ip6 namespace aware
l2tp_ip6 tunnel and session lookups were still using init_net, although
the l2tp core infrastructure already supports lookups keyed by 'net'.

As a result, l2tp_ip6_recv discarded packets for tunnels/sessions
created in namespaces other than the init_net.

Fix, by using dev_net(skb->dev) or sock_net(sk) where appropriate.

Signed-off-by: Shmulik Ladkani <shmulik.ladkani@gmail.com>
Signed-off-by: David S. Miller <davem@davemloft.net>
2016-05-30 00:03:53 -07:00
Krzysztof Kozlowski
3b3428e384 arm64: exynos: Select SOC specific drivers
Recently some Exynos drivers were moved from arm/mach-exynos to
drivers/soc. Building the directory depends on SOC_SAMSUNG Kconfig
option so we want it also on ARMv8 platforms, even though none of the
drivers support ARMv8 SoCs yet.

Signed-off-by: Krzysztof Kozlowski <k.kozlowski@samsung.com>
2016-05-30 08:44:33 +02:00
Javier Martinez Canillas
932994da13 ARM: multi_v7_defconfig: Enable Exynos MFC driver as module
Exynos SoCs have a Multi Format Video Hardware Codec (MFC) IP block that
can be used to {en,de}code video streams by hardware. Enable support for
its driver as a module so the MFC can be tested.

Signed-off-by: Javier Martinez Canillas <javier@osg.samsung.com>
Signed-off-by: Krzysztof Kozlowski <k.kozlowski@samsung.com>
2016-05-30 08:34:36 +02:00
Javier Martinez Canillas
2d3004b78f ARM: exynos_defconfig: Enable MFC driver as module
Exynos SoCs have a Multi Format Video Hardware Codec (MFC) IP block that
can be used to {en,de}code video streams by hardware. Enable support for
its driver as a module so the MFC can be tested.

Signed-off-by: Javier Martinez Canillas <javier@osg.samsung.com>
Signed-off-by: Krzysztof Kozlowski <k.kozlowski@samsung.com>
2016-05-30 08:34:36 +02:00
Javier Martinez Canillas
731798c5bc ARM: multi_v7_defconfig: Enable Samsung media platform drivers as modules
There are a bunch of media platform drivers under drivers/media/platform/
for Samsung SoCs that are enabled in exynos_defconfig but no in multi_v7.

This patch enables them as a module to improve build coverage for these
drivers and also to allow people use them with proper hardware if modules
are installed.

Suggested-by: Krzysztof Kozlowski <k.kozlowski@samsung.com>
Signed-off-by: Javier Martinez Canillas <javier@osg.samsung.com>
Signed-off-by: Krzysztof Kozlowski <k.kozlowski@samsung.com>
2016-05-30 08:34:35 +02:00
Javier Martinez Canillas
3dfb4e634b ARM: exynos_defconfig: Enable Samsung media platform drivers as modules
There are a bunch of media platform drivers under drivers/media/platform/
that are for Samsung SoCs but are not being built with exynos_defconfig.

This patch enables them as a module to improve build coverage for these
drivers and also to allow people use them with proper hardware if modules
are installed. The S5P MFC driver wasn't enabled since it fails to probe.

Only the boolean Kconfig symbols are enabled as built-in, since drivers
are not critical and also to keep the kernel binary image size as small
as possible.

Signed-off-by: Javier Martinez Canillas <javier@osg.samsung.com>
Reviewed-by: Krzysztof Kozlowski <k.kozlowski@samsung.com>
Signed-off-by: Krzysztof Kozlowski <k.kozlowski@samsung.com>
2016-05-30 08:34:34 +02:00
Andrzej Hajda
0869f40905 ARM: multi_v7_defconfig: Enable Exynos DRM Mixer driver
Mixer driver is selected by CONFIG_DRM_EXYNOS_HDMI option. Since Exynos5433
HDMI does not require Mixer and there are separate options to select Mixer
and HDMI.

Signed-off-by: Andrzej Hajda <a.hajda@samsung.com>
Reviewed-by: Krzysztof Kozlowski <k.kozlowski@samsung.com>
Signed-off-by: Krzysztof Kozlowski <k.kozlowski@samsung.com>
2016-05-30 08:34:22 +02:00
Maxime Ripard
684d2d7ca3 ARM: sunxi: Enable sun4i DRM driver
Enable the new DRM driver in the sunxi default configuration

Acked-by: Chen-Yu Tsai <wens@csie.org>
Signed-off-by: Maxime Ripard <maxime.ripard@free-electrons.com>
2016-05-30 08:29:36 +02:00
Maxime Ripard
d85322bf2e ARM: multi_v7: Enable sun4i DRM driver
Enable the new DRM driver in the multi_v7 defconfig

Acked-by: Chen-Yu Tsai <wens@csie.org>
Signed-off-by: Maxime Ripard <maxime.ripard@free-electrons.com>
2016-05-30 08:29:36 +02:00
Chen-Yu Tsai
13fef095bd drm: sun4i: do cleanup if RGB output init fails
sun4i_rgb_init() can fail, which results in TCON failing to bind.
In this case we need to do cleanup, specificly unregistering the
dotclock, which is regmap based, and the regmap is registered as
part of the sun4i_tcon_bind().

Failing to do so results in a NULL pointer reference when the CCF
tries to turn off unused clocks.

Fixes: 29e57fab97 ("drm: sun4i: Add RGB output")
Signed-off-by: Chen-Yu Tsai <wens@csie.org>
Signed-off-by: Maxime Ripard <maxime.ripard@free-electrons.com>
2016-05-30 08:28:33 +02:00
Maxime Ripard
7aa2e2b731 drm/sun4i: Convert to connector register helpers
Now that connector register helpers have been created, switch to them.

Signed-off-by: Maxime Ripard <maxime.ripard@free-electrons.com>
2016-05-30 08:28:33 +02:00
Maxime Ripard
3d6bd9065b drm/sun4i: remove simplefb at probe
If simplefb was setup by our bootloader and enabled in the DT, we will have
a first framebuffer loaded in our system.

However, as soon as our DRM driver will load, it will reset the controller,
initialise it and, if the framebuffer emulation is enabled, register a
second framebuffer device.

This is obviously pretty bad, since the first framebuffer will be some kind
of a black hole, with memory still reserved that we can write to safely,
but not displayed anywhere.

Make sure we remove that framebuffer when we probe so we don't end up in
that situation.

Fixes: 9026e0d122 ("drm: Add Allwinner A10 Display Engine support")
Signed-off-by: Maxime Ripard <maxime.ripard@free-electrons.com>
2016-05-30 08:28:33 +02:00
Maxime Ripard
0de6e914a0 drm/sun4i: rgb: panel is an error pointer
In case of an error, our pointer to the drm_panel structure attached to our
encoder will hold an error pointer, not a NULL pointer.

Make sure we check the right thing.

Fixes: 29e57fab97 ("drm: sun4i: Add RGB output")
Signed-off-by: Maxime Ripard <maxime.ripard@free-electrons.com>
2016-05-30 08:28:33 +02:00
Maxime Ripard
0bbbb00bda drm/sun4i: defer only if we didn't find our panel
Our code currently defers our probe on any error, even if we were not
expecting to have one at all.

Make sure we return -EPROBE_DEFER only when we were supposed to have a
panel, but it's not probed yet.

Also fix a typo while we're at it.

Fixes: 29e57fab97 ("drm: sun4i: Add RGB output")
Signed-off-by: Maxime Ripard <maxime.ripard@free-electrons.com>
2016-05-30 08:28:33 +02:00
Maxime Ripard
bb43d40d7c drm/sun4i: rgb: Validate the clock rate
Our pixel clock cannot reach a high enough rate for some rather high while
common resolutions (like 1080p60).

Make sure we filter the resolutions we cannot reach in our mode_valid
function.

Fixes: 29e57fab97 ("drm: sun4i: Add RGB output")
Signed-off-by: Maxime Ripard <maxime.ripard@free-electrons.com>
2016-05-30 08:28:33 +02:00
Maxime Ripard
4731a72df2 drm/sun4i: request exact rates to our parents
Our pixel clock currently only tries to deal with the current parent rate.

While that works when the resolution is the same than the one already
program, or when we can compute directly the rate from the current parent
rate, it cannot work in most situation when we want to change the
frequency, and we end up with an improper pixel clock rate, which obviously
doesn't work as expected.

Ask our parent for all the possible dividers if it can reach that
frequency, and return the best parent rate to the clock framework so that
we can use it.

Fixes: 9026e0d122 ("drm: Add Allwinner A10 Display Engine support")
Signed-off-by: Maxime Ripard <maxime.ripard@free-electrons.com>
2016-05-30 08:28:33 +02:00
Arnd Bergmann
9fa2568d9f drm: sun4i: fix probe error handling
gcc points out a possible uninitialized variable use in
sun4i_dclk_create():

drivers/gpu/drm/sun4i/sun4i_dotclock.c: In function 'sun4i_dclk_create':
drivers/gpu/drm/sun4i/sun4i_dotclock.c:139:12: error: 'clk_name' may be used uninitialized in this function [-Werror=maybe-uninitialized]
  init.name = clk_name;

The warning only shows up when CONFIG_OF is disabled, and the
property is never filled, but the same bug can show up even
when CONFIG_OF is enabled but of_property_read_string_index
returns another error.

To fix it, this ensures that sun4i_dclk_create propagates
any error from of_property_read_string_index.

Signed-off-by: Arnd Bergmann <arnd@arndb.de>
Fixes: 9026e0d122 ("drm: Add Allwinner A10 Display Engine support")
Signed-off-by: Maxime Ripard <maxime.ripard@free-electrons.com>
2016-05-30 08:28:33 +02:00
Arnd Bergmann
f1b78f0e75 drm: sun4i: print DMA address correctly
The newly added sun4i drm driver prints a dma address using the %x
format string, which cannot work when dma_addr_t is 64 bit,
and gcc warns about this configuration:

drm/sun4i/sun4i_backend.c: In function 'sun4i_backend_update_layer_buffer':
drm/sun4i/sun4i_backend.c:193:84: error: format '%x' expects argument of type 'unsigned int', but argument 3 has type 'dma_addr_t {aka long long unsigned int}' [-Werror=format=]
  DRM_DEBUG_DRIVER("Using GEM @ 0x%x\n", gem->paddr);
drm/sun4i/sun4i_backend.c:201:84: error: format '%x' expects argument of type 'unsigned int', but argument 3 has type 'dma_addr_t {aka long long unsigned int}' [-Werror=format=]
  DRM_DEBUG_DRIVER("Setting buffer address to 0x%x\n", paddr);

This changes the code to use the explicit %pad format string, which
always prints the right length.

Signed-off-by: Arnd Bergmann <arnd@arndb.de>
Signed-off-by: Maxime Ripard <maxime.ripard@free-electrons.com>
2016-05-30 08:28:33 +02:00
Arnd Bergmann
bebef39842 drm/sun4i: add COMMON_CLK dependency
The sun4i drm driver uses the clk-provider interfaces, which are not available
when CONFIG_COMMON_CLK is disabled:

drivers/gpu/drm/sun4i/sun4i_dotclock.c:19:16: error: field 'hw' has incomplete type
  struct clk_hw hw;
In file included from ../include/asm-generic/bug.h:13:0,
                 from ../arch/arm/include/asm/bug.h:59,
                 from ../include/linux/bug.h:4,
                 from ../include/linux/io.h:23,
                 from ../include/linux/clk-provider.h:14,
                 from ../drivers/gpu/drm/sun4i/sun4i_dotclock.c:13:
drivers/gpu/drm/sun4i/sun4i_dotclock.c: In function 'hw_to_dclk':
include/linux/kernel.h:831:48: error: initialization from incompatible pointer type [-Werror=incompatible-pointer-types]
...

This adds a Kconfig dependency to prevent the driver from being enabled
in this case.

Signed-off-by: Arnd Bergmann <arnd@arndb.de>
Fixes: 9026e0d122 ("drm: Add Allwinner A10 Display Engine support")
Signed-off-by: Maxime Ripard <maxime.ripard@free-electrons.com>
2016-05-30 08:28:33 +02:00
Bartlomiej Zolnierkiewicz
3809e4d39c ARM: exynos_defconfig: Disable big.LITTLE switcher
Disable big.LITTLE switcher in order to allow automatic usage of
cpufreq-dt driver on Exynos542x/Exynos5800 SoCs based boards.

This change should not cause any problems as arm_big_little[_dt]
driver (which is using big.LITTLE switcher support to do the "real"
big.LITTLE switching work) is not used on any Exynos SoC based
board currently.

Signed-off-by: Bartlomiej Zolnierkiewicz <b.zolnierkie@samsung.com>
Tested-by: Markus Reichl <m.reichl@fivetechno.de>
Reviewed-by: Javier Martinez Canillas <javier@osg.samsung.com>
Tested-by: Javier Martinez Canillas <javier@osg.samsung.com>
Reviewed-by: Anand Moon <linux.amoon@gmail.com>
Tested-by: Anand Moon <linux.amoon@gmail.com>
Reviewed-by: Krzysztof Kozlowski <k.kozlowski@samsung.com>
Signed-off-by: Krzysztof Kozlowski <k.kozlowski@samsung.com>
2016-05-30 08:22:22 +02:00
Eric Garver
176b346b37 Documentation: ip-sysctl.txt: clarify secure_redirects
Clarify how secure_redirects works. Mention that RFC1122 always applies.

Signed-off-by: Eric Garver <e@erig.me>
Signed-off-by: David S. Miller <davem@davemloft.net>
2016-05-29 22:40:53 -07:00
Edward Cree
68bb399e65 sfc: use flow dissector helpers for aRFS
Signed-off-by: Edward Cree <ecree@solarflare.com>
Signed-off-by: David S. Miller <davem@davemloft.net>
2016-05-29 22:38:55 -07:00
Baozeng Ding
421eeea10d ieee802154: fix logic error in ieee802154_llsec_parse_dev_addr
Fix a logic error to avoid potential null pointer dereference.

Signed-off-by: Baozeng Ding <sploving1@gmail.com>
Reviewed-by: Stefan Schmidt<stefan@osg.samsung.com>
Signed-off-by: David S. Miller <davem@davemloft.net>
2016-05-29 22:36:25 -07:00
Elad Kanfi
86651650d1 net: nps_enet: Disable interrupts before napi reschedule
Since NAPI works by shutting down event interrupts when theres
work and turning them on when theres none, the net driver must
make sure that interrupts are disabled when it reschedules polling.
By calling napi_reschedule, the driver switches to polling mode,
therefor there should be no interrupt interference.
Any received packets will be handled in nps_enet_poll by polling the HW
indication of received packet until all packets are handled.

Signed-off-by: Elad Kanfi <eladkan@mellanox.com>
Acked-by: Noam Camus <noamca@mellanox.com>
Tested-by: Alexey Brodkin <abrodkin@synopsys.com>
Signed-off-by: David S. Miller <davem@davemloft.net>
2016-05-29 22:35:21 -07:00
Andy Shevchenko
0d08df6c49 net/lapb: tuse %*ph to dump buffers
Use %*ph specifier to dump small buffers in hex format instead doing this
byte-by-byte.

Signed-off-by: Andy Shevchenko <andriy.shevchenko@linux.intel.com>
Signed-off-by: David S. Miller <davem@davemloft.net>
2016-05-29 22:33:25 -07:00
Dan Carpenter
6756325a9a ptp: oops in ptp_ioctl()
If we pass ERR_PTR(-EFAULT) to kfree() then it's going to oops.

Fixes: 2ece068e1b ('ptp: use memdup_user().')
Signed-off-by: Dan Carpenter <dan.carpenter@oracle.com>
Acked-by: Richard Cochran <richardcochran@gmail.com>
Signed-off-by: David S. Miller <davem@davemloft.net>
2016-05-29 22:32:27 -07:00
Arnd Bergmann
fabb13db44 fou: add Kconfig options for IPv6 support
A previous patch added the fou6.ko module, but that failed to link
in a couple of configurations:

net/built-in.o: In function `ip6_tnl_encap_add_fou_ops':
net/ipv6/fou6.c:88: undefined reference to `ip6_tnl_encap_add_ops'
net/ipv6/fou6.c:94: undefined reference to `ip6_tnl_encap_add_ops'
net/ipv6/fou6.c:97: undefined reference to `ip6_tnl_encap_del_ops'
net/built-in.o: In function `ip6_tnl_encap_del_fou_ops':
net/ipv6/fou6.c:106: undefined reference to `ip6_tnl_encap_del_ops'
net/ipv6/fou6.c:107: undefined reference to `ip6_tnl_encap_del_ops'

If CONFIG_IPV6=m, ip6_tnl_encap_add_ops/ip6_tnl_encap_del_ops
are in a module, but fou6.c can still be built-in, and that
obviously fails to link.

Also, if CONFIG_IPV6=y, but CONFIG_IPV6_TUNNEL=m or
CONFIG_IPV6_TUNNEL=n, the same problem happens for a different
reason.

This adds two new silent Kconfig symbols to work around both
problems:

- CONFIG_IPV6_FOU is now always set to 'm' if either CONFIG_NET_FOU=m
  or CONFIG_IPV6=m
- CONFIG_IPV6_FOU_TUNNEL is set implicitly when IPV6_FOU is enabled
  and NET_FOU_IP_TUNNELS is also turned out, and it will ensure
  that CONFIG_IPV6_TUNNEL is also available.

The options could be made user-visible as well, to give additional
room for configuration, but it seems easier not to bother users
with more choice here.

Signed-off-by: Arnd Bergmann <arnd@arndb.de>
Fixes: aa3463d65e ("fou: Add encap ops for IPv6 tunnels")
Signed-off-by: David S. Miller <davem@davemloft.net>
2016-05-29 22:24:21 -07:00
Arnd Bergmann
9791d8e762 ipv6: hide ip6_encap_hlen/ip6_tnl_encap definitions
A recent cleanup moved MAX_IPTUN_ENCAP_OPS along with some other
definitions, but it is now invisible when CONFIG_INET is
not defined, but still referenced from ip6_tunnel.h:

In file included from net/xfrm/xfrm_input.c:17:0:
include/net/ip6_tunnel.h:67:17: error: 'MAX_IPTUN_ENCAP_OPS' undeclared here (not in a function)
   ip6tun_encaps[MAX_IPTUN_ENCAP_OPS];
                 ^~~~~~~~~~~~~~~~~~~

This hides the ip6_encap_hlen and ip6_tnl_encap functions inside
of CONFIG_INET so we don't run into the the problem.

Alternatively we could move the macro out of the #ifdef again to
restore the previous behavior

Signed-off-by: Arnd Bergmann <arnd@arndb.de>
Fixes: 55c2bc1432 ("net: Cleanup encap items in ip_tunnels.h")
Signed-off-by: David S. Miller <davem@davemloft.net>
2016-05-29 22:24:21 -07:00
Ludovic Desroches
9295c41d77 dmaengine: at_xdmac: double FIFO flush needed to compute residue
Due to the way CUBC register is updated, a double flush is needed to
compute an accurate residue. First flush aim is to get data from the DMA
FIFO and second one ensures that we won't report data which are not in
memory.

Signed-off-by: Ludovic Desroches <ludovic.desroches@atmel.com>
Fixes: e1f7c9eee7 ("dmaengine: at_xdmac: creation of the atmel
eXtended DMA Controller driver")
Cc: stable@vger.kernel.org #v4.1 and later
Reviewed-by: Nicolas Ferre <nicolas.ferre@atmel.com>
Signed-off-by: Vinod Koul <vinod.koul@intel.com>
2016-05-30 10:47:52 +05:30
Ludovic Desroches
53398f4888 dmaengine: at_xdmac: fix residue corruption
An unexpected value of CUBC can lead to a corrupted residue. A more
complex sequence is needed to detect an inaccurate value for NCA or CUBC.

Signed-off-by: Ludovic Desroches <ludovic.desroches@atmel.com>
Fixes: e1f7c9eee7 ("dmaengine: at_xdmac: creation of the atmel
eXtended DMA Controller driver")
Cc: stable@vger.kernel.org #v4.1 and later
Reviewed-by: Nicolas Ferre <nicolas.ferre@atmel.com>
Signed-off-by: Vinod Koul <vinod.koul@intel.com>
2016-05-30 10:47:52 +05:30
Ludovic Desroches
4a9723e8df dmaengine: at_xdmac: align descriptors on 64 bits
Having descriptors aligned on 64 bits allows update CNDA and CUBC in an
atomic way.

Signed-off-by: Ludovic Desroches <ludovic.desroches@atmel.com>
Fixes: e1f7c9eee7 ("dmaengine: at_xdmac: creation of the atmel
eXtended DMA Controller driver")
Cc: stable@vger.kernel.org #v4.1 and later
Reviewed-by: Nicolas Ferre <nicolas.ferre@atmel.com>
Signed-off-by: Vinod Koul <vinod.koul@intel.com>
2016-05-30 10:47:52 +05:30
Geert Uytterhoeven
c56d329e28 MAINTAINERS: Add file patterns for dma device tree bindings
Submitters of device tree binding documentation may forget to CC
the subsystem maintainer if this is missing.

Signed-off-by: Geert Uytterhoeven <geert@linux-m68k.org>
Cc: Vinod Koul <vinod.koul@intel.com>
Cc: dmaengine@vger.kernel.org
Signed-off-by: Vinod Koul <vinod.koul@intel.com>
2016-05-30 10:37:31 +05:30
Alexey Brodkin
49acadff2a arc: Get rid of root core-frequency property
Now when we switched to usage of real clk devices for CPU core
frequency those root properties make no sense any longer.
Se we're just getting rid of them here to not confuse readers of
our .dts files.

Signed-off-by: Alexey Brodkin <abrodkin@synopsys.com>
Cc: Christian Ruppert <christian.ruppert@alitech.com>
Cc: Noam Camus <noamca@mellanox.com>
Signed-off-by: Vineet Gupta <vgupta@synopsys.com>
2016-05-30 10:07:32 +05:30
Andrea Gelmini
2547476a5e Fix typos
Signed-off-by: Andrea Gelmini <andrea.gelmini@gelma.net>
Signed-off-by: Vineet Gupta <vgupta@synopsys.com>
2016-05-30 10:07:32 +05:30
Russell Currey
bd000b82e8 powerpc/pseries/eeh: Refactor the configure_bridge RTAS tokens
The RTAS calls "ibm,configure-pe" and "ibm,configure-bridge" perform the
same actions, however the former can skip configuration if unnecessary.
The existing code treats them as different tokens even though only one
will ever be called.  Refactor this by making a single token that is
assigned during init.

Signed-off-by: Russell Currey <ruscur@russell.cc>
Acked-by: Gavin Shan <gwshan@linux.vnet.ibm.com>
Signed-off-by: Michael Ellerman <mpe@ellerman.id.au>
2016-05-30 13:50:12 +10:00
Russell Currey
871e178e0f powerpc/pseries/eeh: Handle RTAS delay requests in configure_bridge
In the "ibm,configure-pe" and "ibm,configure-bridge" RTAS calls, the
spec states that values of 9900-9905 can be returned, indicating that
software should delay for 10^x (where x is the last digit, i.e. 990x)
milliseconds and attempt the call again. Currently, the kernel doesn't
know about this, and respecting it fixes some PCI failures when the
hypervisor is busy.

The delay is capped at 0.2 seconds.

Cc: <stable@vger.kernel.org> # 3.10+
Signed-off-by: Russell Currey <ruscur@russell.cc>
Acked-by: Gavin Shan <gwshan@linux.vnet.ibm.com>
Signed-off-by: Michael Ellerman <mpe@ellerman.id.au>
2016-05-30 13:50:04 +10:00
Kuninori Morimoto
3565fe5333 dmaengine: rcar-dmac: use list_add() on rcar_dmac_desc_put()
For each descriptor, in addition to the memory used by the descriptors
structure itself, the driver allocates a list of chunks as well as a
buffer for hardware descriptors. Descriptors themselves are preallocated,
and allocation of the chunks and buffer is performed the first time the
descriptor is used. The memory isn't freed when the transfer is completed,
as the chunks and buffer will be needed again when the descriptor is
reused internally, so the driver keeps the memory around.

If only a few descriptors are used concurrently, the current
list_add_tail() implementation will result in all preallocated descriptors
being used before going back to the first one, and will thus allocate
chunks and a buffer for all preallocated descriptors. Using list_add()
will put the complete descriptor at the head of the list of available
descriptors, so the next transfer will be more likely to reuse a
descriptor that already has associated memory instead of one that has
never been used before.

Signed-off-by: Kuninori Morimoto <kuninori.morimoto.gx@renesas.com>
Signed-off-by: Vinod Koul <vinod.koul@intel.com>
2016-05-30 09:12:00 +05:30
David S. Miller
7cafc0b8bf sparc64: Fix return from trap window fill crashes.
We must handle data access exception as well as memory address unaligned
exceptions from return from trap window fill faults, not just normal
TLB misses.

Otherwise we can get an OOPS that looks like this:

ld-linux.so.2(36808): Kernel bad sw trap 5 [#1]
CPU: 1 PID: 36808 Comm: ld-linux.so.2 Not tainted 4.6.0 #34
task: fff8000303be5c60 ti: fff8000301344000 task.ti: fff8000301344000
TSTATE: 0000004410001601 TPC: 0000000000a1a784 TNPC: 0000000000a1a788 Y: 00000002    Not tainted
TPC: <do_sparc64_fault+0x5c4/0x700>
g0: fff8000024fc8248 g1: 0000000000db04dc g2: 0000000000000000 g3: 0000000000000001
g4: fff8000303be5c60 g5: fff800030e672000 g6: fff8000301344000 g7: 0000000000000001
o0: 0000000000b95ee8 o1: 000000000000012b o2: 0000000000000000 o3: 0000000200b9b358
o4: 0000000000000000 o5: fff8000301344040 sp: fff80003013475c1 ret_pc: 0000000000a1a77c
RPC: <do_sparc64_fault+0x5bc/0x700>
l0: 00000000000007ff l1: 0000000000000000 l2: 000000000000005f l3: 0000000000000000
l4: fff8000301347e98 l5: fff8000024ff3060 l6: 0000000000000000 l7: 0000000000000000
i0: fff8000301347f60 i1: 0000000000102400 i2: 0000000000000000 i3: 0000000000000000
i4: 0000000000000000 i5: 0000000000000000 i6: fff80003013476a1 i7: 0000000000404d4c
I7: <user_rtt_fill_fixup+0x6c/0x7c>
Call Trace:
 [0000000000404d4c] user_rtt_fill_fixup+0x6c/0x7c

The window trap handlers are slightly clever, the trap table entries for them are
composed of two pieces of code.  First comes the code that actually performs
the window fill or spill trap handling, and then there are three instructions at
the end which are for exception processing.

The userland register window fill handler is:

	add	%sp, STACK_BIAS + 0x00, %g1;		\
	ldxa	[%g1 + %g0] ASI, %l0;			\
	mov	0x08, %g2;				\
	mov	0x10, %g3;				\
	ldxa	[%g1 + %g2] ASI, %l1;			\
	mov	0x18, %g5;				\
	ldxa	[%g1 + %g3] ASI, %l2;			\
	ldxa	[%g1 + %g5] ASI, %l3;			\
	add	%g1, 0x20, %g1;				\
	ldxa	[%g1 + %g0] ASI, %l4;			\
	ldxa	[%g1 + %g2] ASI, %l5;			\
	ldxa	[%g1 + %g3] ASI, %l6;			\
	ldxa	[%g1 + %g5] ASI, %l7;			\
	add	%g1, 0x20, %g1;				\
	ldxa	[%g1 + %g0] ASI, %i0;			\
	ldxa	[%g1 + %g2] ASI, %i1;			\
	ldxa	[%g1 + %g3] ASI, %i2;			\
	ldxa	[%g1 + %g5] ASI, %i3;			\
	add	%g1, 0x20, %g1;				\
	ldxa	[%g1 + %g0] ASI, %i4;			\
	ldxa	[%g1 + %g2] ASI, %i5;			\
	ldxa	[%g1 + %g3] ASI, %i6;			\
	ldxa	[%g1 + %g5] ASI, %i7;			\
	restored;					\
	retry; nop; nop; nop; nop;			\
	b,a,pt	%xcc, fill_fixup_dax;			\
	b,a,pt	%xcc, fill_fixup_mna;			\
	b,a,pt	%xcc, fill_fixup;

And the way this works is that if any of those memory accesses
generate an exception, the exception handler can revector to one of
those final three branch instructions depending upon which kind of
exception the memory access took.  In this way, the fault handler
doesn't have to know if it was a spill or a fill that it's handling
the fault for.  It just always branches to the last instruction in
the parent trap's handler.

For example, for a regular fault, the code goes:

winfix_trampoline:
	rdpr	%tpc, %g3
	or	%g3, 0x7c, %g3
	wrpr	%g3, %tnpc
	done

All window trap handlers are 0x80 aligned, so if we "or" 0x7c into the
trap time program counter, we'll get that final instruction in the
trap handler.

On return from trap, we have to pull the register window in but we do
this by hand instead of just executing a "restore" instruction for
several reasons.  The largest being that from Niagara and onward we
simply don't have enough levels in the trap stack to fully resolve all
possible exception cases of a window fault when we are already at
trap level 1 (which we enter to get ready to return from the original
trap).

This is executed inline via the FILL_*_RTRAP handlers.  rtrap_64.S's
code branches directly to these to do the window fill by hand if
necessary.  Now if you look at them, we'll see at the end:

	    ba,a,pt    %xcc, user_rtt_fill_fixup;
	    ba,a,pt    %xcc, user_rtt_fill_fixup;
	    ba,a,pt    %xcc, user_rtt_fill_fixup;

And oops, all three cases are handled like a fault.

This doesn't work because each of these trap types (data access
exception, memory address unaligned, and faults) store their auxiliary
info in different registers to pass on to the C handler which does the
real work.

So in the case where the stack was unaligned, the unaligned trap
handler sets up the arg registers one way, and then we branched to
the fault handler which expects them setup another way.

So the FAULT_TYPE_* value ends up basically being garbage, and
randomly would generate the backtrace seen above.

Reported-by: Nick Alcock <nix@esperi.org.uk>
Signed-off-by: David S. Miller <davem@davemloft.net>
2016-05-29 18:55:54 -07:00
Simon Horman
21cc405c8a arm64: dts: r8a7795: Drop 0x from unit address of gic
Drop 0x from unit address of gic as this is the desired form for
a unit address.

Signed-off-by: Simon Horman <horms+renesas@verge.net.au>
Acked-by: Geert Uytterhoeven <geert+renesas@glider.be>
2016-05-30 10:18:01 +09:00
Geert Uytterhoeven
3fd0498b84 MAINTAINERS: Drop drivers/sh/ for Renesas ARM
None of the code under drivers/sh/ is used anymore on Renesas ARM.

Signed-off-by: Geert Uytterhoeven <geert+renesas@glider.be>
2016-05-30 09:41:39 +09:00
Geert Uytterhoeven
4c6d7e2289 drivers: sh: Stop using the legacy clock domain on ARM
Since commits 71d076ceb2 ("ARM: shmobile: Enable PM and
PM_GENERIC_DOMAINS for SoCs with PM Domains") and 2ee98234b8
("arm64: renesas: Enable PM and PM_GENERIC_DOMAINS for SoCs with PM
Domains"), CONFIG_PM and CONFIG_PM_GENERIC_DOMAINS are enabled
unconditionally for Renesas ARM-based SoCs. Hence the legacy clock
domain is no longer used on these SoCs.

Remove the related support code, and stop entering drivers/sh/ on ARM.

Signed-off-by: Geert Uytterhoeven <geert+renesas@glider.be>
Signed-off-by: Simon Horman <horms+renesas@verge.net.au>
2016-05-30 09:41:11 +09:00
Geert Uytterhoeven
c94bc815f3 ARM: shmobile: rcar-gen2: Use ICRAM1 for jump stub on all SoCs
Currently the different SoCs in the R-Car Gen2 family use different
types of on-chip RAM for the jump stub:
  - R-Car H2 uses Media RAM,
  - R-Car M2-W uses another type of optional On-chip RAM, as it doesn't
    have Media RAM,
  - R-Car M2-N uses Inter Connect RAM in Magnus Damm's "ARM: shmobile:
    r8a7793 boot address update".

As all R-Car Gen2 SoCs have 4 KiB of Inter Connect RAM, consolidate the
code by always using that.

Signed-off-by: Geert Uytterhoeven <geert+renesas@glider.be>
Signed-off-by: Simon Horman <horms+renesas@verge.net.au>
2016-05-30 09:39:43 +09:00
Geert Uytterhoeven
85d9bf152b ARM: shmobile: pm-rmobile: Postpone call to pm_genpd_init()
All local setup of the generic_pm_domain structure should have been
completed before calling pm_genpd_init().

Signed-off-by: Geert Uytterhoeven <geert+renesas@glider.be>
Reviewed-by: Ulf Hansson <ulf.hansson@linaro.org>
Signed-off-by: Simon Horman <horms+renesas@verge.net.au>
2016-05-30 09:39:42 +09:00
Geert Uytterhoeven
b6960f1967 ARM: dts: silk: Fix W=1 dtc warnings
Warning (unit_address_vs_reg): Node /regulator@0 has a unit name, but no reg property
Warning (unit_address_vs_reg): Node /regulator@3 has a unit name, but no reg property
Warning (unit_address_vs_reg): Node /regulator@4 has a unit name, but no reg property

Signed-off-by: Geert Uytterhoeven <geert+renesas@glider.be>
Signed-off-by: Simon Horman <horms+renesas@verge.net.au>
2016-05-30 09:37:13 +09:00
Geert Uytterhoeven
afed0c94ee ARM: dts: porter: Fix W=1 dtc warnings
Warning (unit_address_vs_reg): Node /regulator@0 has a unit name, but no reg property
Warning (unit_address_vs_reg): Node /regulator@1 has a unit name, but no reg property
Warning (unit_address_vs_reg): Node /regulator@2 has a unit name, but no reg property
Warning (unit_address_vs_reg): Node /regulator@3 has a unit name, but no reg property

Signed-off-by: Geert Uytterhoeven <geert+renesas@glider.be>
Signed-off-by: Simon Horman <horms+renesas@verge.net.au>
2016-05-30 09:37:13 +09:00
Geert Uytterhoeven
983ee3de2c ARM: dts: marzen: Fix W=1 dtc warnings
Warning (unit_address_vs_reg): Node /memory has a reg or ranges property, but no unit name
Warning (unit_address_vs_reg): Node /fixedregulator@0 has a unit name, but no reg property

Signed-off-by: Geert Uytterhoeven <geert+renesas@glider.be>
Signed-off-by: Simon Horman <horms+renesas@verge.net.au>
2016-05-30 09:37:13 +09:00
Geert Uytterhoeven
affe802c39 ARM: dts: lager: Fix W=1 dtc warnings
Warning (unit_address_vs_reg): Node /keyboard/button@1 has a unit name, but no reg property
Warning (unit_address_vs_reg): Node /keyboard/button@2 has a unit name, but no reg property
Warning (unit_address_vs_reg): Node /keyboard/button@3 has a unit name, but no reg property
Warning (unit_address_vs_reg): Node /keyboard/button@4 has a unit name, but no reg property
Warning (unit_address_vs_reg): Node /fixedregulator@0 has a unit name, but no reg property
Warning (unit_address_vs_reg): Node /regulator@1 has a unit name, but no reg property
Warning (unit_address_vs_reg): Node /regulator@2 has a unit name, but no reg property
Warning (unit_address_vs_reg): Node /regulator@3 has a unit name, but no reg property
Warning (unit_address_vs_reg): Node /regulator@4 has a unit name, but no reg property
Warning (unit_address_vs_reg): Node /i2c@8 has a unit name, but no reg property

Signed-off-by: Geert Uytterhoeven <geert+renesas@glider.be>
Signed-off-by: Simon Horman <horms+renesas@verge.net.au>
2016-05-30 09:37:13 +09:00
Geert Uytterhoeven
8788b2c4f4 ARM: dts: kzm9g: Fix W=1 dtc warnings
Warning (unit_address_vs_reg): Node /memory has a reg or ranges property, but no unit name
Warning (unit_address_vs_reg): Node /regulator@0 has a unit name, but no reg property
Warning (unit_address_vs_reg): Node /regulator@1 has a unit name, but no reg property
Warning (unit_address_vs_reg): Node /regulator@2 has a unit name, but no reg property
Warning (unit_address_vs_reg): Node /regulator@3 has a unit name, but no reg property

Signed-off-by: Geert Uytterhoeven <geert+renesas@glider.be>
Signed-off-by: Simon Horman <horms+renesas@verge.net.au>
2016-05-30 09:37:12 +09:00
Geert Uytterhoeven
815be9c2a4 ARM: dts: kzm9d: Fix W=1 dtc warnings
Warning (unit_address_vs_reg): Node /memory has a reg or ranges property, but no unit name
Warning (unit_address_vs_reg): Node /pfc@e0140200/serial@e1030000 has a unit name, but no reg property
Warning (unit_address_vs_reg): Node /gpio_keys/button@1 has a unit name, but no reg property
Warning (unit_address_vs_reg): Node /gpio_keys/button@2 has a unit name, but no reg property
Warning (unit_address_vs_reg): Node /gpio_keys/button@3 has a unit name, but no reg property
Warning (unit_address_vs_reg): Node /gpio_keys/button@4 has a unit name, but no reg property
Warning (unit_address_vs_reg): Node /regulator@0 has a unit name, but no reg property
Warning (unit_address_vs_reg): Node /regulator@1 has a unit name, but no reg property

Signed-off-by: Geert Uytterhoeven <geert+renesas@glider.be>
Signed-off-by: Simon Horman <horms+renesas@verge.net.au>
2016-05-30 09:37:12 +09:00