Commit graph

677822 commits

Author SHA1 Message Date
Johan Hovold
26cede3436 USB: serial: mct_u232: fix big-endian baud-rate handling
Drop erroneous cpu_to_le32 when setting the baud rate, something which
corrupted the divisor on big-endian hosts.

Found using sparse:

	warning: incorrect type in argument 1 (different base types)
	    expected unsigned int [unsigned] [usertype] val
	    got restricted __le32 [usertype] <noident>

Fixes: af2ac1a091 ("USB: serial mct_usb232: move DMA buffers to heap")
Cc: stable <stable@vger.kernel.org>     # 2.6.34
Reviewed-by: Greg Kroah-Hartman <gregkh@linuxfoundation.org>
Acked-By: Pete Zaitcev <zaitcev@yahoo.com>
Signed-off-by: Johan Hovold <johan@kernel.org>
2017-05-15 11:51:15 +02:00
Johan Hovold
ad0ccac76d USB: serial: ir-usb: fix big-endian baud-rate debug printk
Add missing endianness conversion when printing the supported baud
rates.

Found using sparse:

	warning: restricted __le16 degrades to integer

Fixes: e0d795e4f3 ("usb: irda: cleanup on ir-usb module")
Reviewed-by: Greg Kroah-Hartman <gregkh@linuxfoundation.org>
Signed-off-by: Johan Hovold <johan@kernel.org>
2017-05-15 11:50:34 +02:00
Malcolm Priestley
95d93e271d staging: rtl8192e: GetTs Fix invalid TID 7 warning.
TID 7 is a valid value for QoS IEEE 802.11e.

The switch statement that follows states 7 is valid.

Remove function IsACValid and use the default case to filter
invalid TIDs.

Signed-off-by: Malcolm Priestley <tvboxspy@gmail.com>
Cc: <stable@vger.kernel.org>
Signed-off-by: Greg Kroah-Hartman <gregkh@linuxfoundation.org>
2017-05-15 11:48:45 +02:00
Malcolm Priestley
90be652c9f staging: rtl8192e: rtl92e_get_eeprom_size Fix read size of EPROM_CMD.
EPROM_CMD is 2 byte aligned on PCI map so calling with rtl92e_readl
will return invalid data so use rtl92e_readw.

The device is unable to select the right eeprom type.

Signed-off-by: Malcolm Priestley <tvboxspy@gmail.com>
Cc: <stable@vger.kernel.org>
Signed-off-by: Greg Kroah-Hartman <gregkh@linuxfoundation.org>
2017-05-15 11:48:45 +02:00
Malcolm Priestley
867510bde1 staging: rtl8192e: fix 2 byte alignment of register BSSIDR.
BSSIDR has two byte alignment on PCI ioremap correct the write
by swapping to 16 bits first.

This fixes a problem that the device associates fail because
the filter is not set correctly.

Signed-off-by: Malcolm Priestley <tvboxspy@gmail.com>
Cc: <stable@vger.kernel.org>
Signed-off-by: Greg Kroah-Hartman <gregkh@linuxfoundation.org>
2017-05-15 11:48:44 +02:00
Malcolm Priestley
baabd567f8 staging: rtl8192e: rtl92e_fill_tx_desc fix write to mapped out memory.
The driver attempts to alter memory that is mapped to PCI device.

This is because tx_fwinfo_8190pci points to skb->data

Move the pci_map_single to when completed buffer is ready to be mapped with
psdec is empty to drop on mapping error.

Signed-off-by: Malcolm Priestley <tvboxspy@gmail.com>
Cc: <stable@vger.kernel.org>
Signed-off-by: Greg Kroah-Hartman <gregkh@linuxfoundation.org>
2017-05-15 11:48:44 +02:00
Phil Elwell
ff92b9e3c9 staging: vc04_services: Fix bulk cache maintenance
vchiq_arm supports transfers less than one page and at arbitrary
alignment, using the dma-mapping API to perform its cache maintenance
(even though the VPU drives the DMA hardware). Read (DMA_FROM_DEVICE)
operations use cache invalidation for speed, falling back to
clean+invalidate on partial cache lines, with writes (DMA_TO_DEVICE)
using flushes.

If a read transfer has ends which aren't page-aligned, performing cache
maintenance as if they were whole pages can lead to memory corruption
since the partial cache lines at the ends (and any cache lines before or
after the transfer area) will be invalidated. This bug was masked until
the disabling of the cache flush in flush_dcache_page().

Honouring the requested transfer start- and end-points prevents the
corruption.

Fixes: cf9caf1929 ("staging: vc04_services: Replace dmac_map_area with dmac_map_sg")
Signed-off-by: Phil Elwell <phil@raspberrypi.org>
Cc: stable <stable@vger.kernel.org> # 4.10
Reported-by: Stefan Wahren <stefan.wahren@i2se.com>
Tested-by: Stefan Wahren <stefan.wahren@i2se.com>
Signed-off-by: Greg Kroah-Hartman <gregkh@linuxfoundation.org>
2017-05-15 11:48:44 +02:00
Ian Chard
c21376631d staging: ccree: remove extraneous spin_unlock_bh() in error handler
An early error handler in send_request() tries to release a spinlock,
but the lock isn't acquired until the loop below it is entered.

Signed-off-by: Ian Chard <ian@chard.org>
Acked-by: Gilad Ben-Yossef <gilad@benyossef.com>
Signed-off-by: Greg Kroah-Hartman <gregkh@linuxfoundation.org>
2017-05-15 11:48:44 +02:00
Guru Das Srinagesh
f03d95f590 staging: typec: Fix sparse warnings about incorrect types
Fix the following sparse warnings about incorrect type usage:

fusb302.c:1028:32: warning: incorrect type in argument 1 (different base types)
fusb302.c:1028:32:    expected unsigned short [unsigned] [usertype] header
fusb302.c:1028:32:    got restricted __le16 const [usertype] header
fusb302.c:1484:32: warning: incorrect type in argument 1 (different base types)
fusb302.c:1484:32:    expected unsigned short [unsigned] [usertype] header
fusb302.c:1484:32:    got restricted __le16 [usertype] header

Signed-off-by: Guru Das Srinagesh <gurooodas@gmail.com>
Reviewed-by: Guenter Roeck <linux@roeck-us.net>
Signed-off-by: Greg Kroah-Hartman <gregkh@linuxfoundation.org>
2017-05-15 11:37:26 +02:00
Rui Miguel Silva
2c8e3f44f7 staging: typec: fusb302: do not free gpio from managed resource
When allocating a gpio using the managed resource devm_, we can avoid freeing it
manually. But even if we did it we should use devm_gpio_free.

So, just remove the free of the gpio in the error path.

Signed-off-by: Rui Miguel Silva <rmfrfs@gmail.com>
Acked-by: Yueyao Zhu <yueyao.zhu@gmail.com>
Reviewed-by: Guenter Roeck <linux@roeck-us.net>
Signed-off-by: Greg Kroah-Hartman <gregkh@linuxfoundation.org>
2017-05-15 11:37:26 +02:00
Marc Zyngier
15d2bffdde KVM: arm/arm64: vgic-v3: Use PREbits to infer the number of ICH_APxRn_EL2 registers
The GICv3 documentation is extremely confusing, as it talks about
the number of priorities represented by the ICH_APxRn_EL2 registers,
while it should really talk about the number of preemption levels.

This leads to a bug where we may access undefined ICH_APxRn_EL2
registers, since PREbits is allowed to be smaller than PRIbits.
Thankfully, nobody seem to have taken this path so far...

The fix is to use ICH_VTR_EL2.PREbits instead.

Signed-off-by: Marc Zyngier <marc.zyngier@arm.com>
Reviewed-by: Christoffer Dall <cdall@linaro.org>
Signed-off-by: Christoffer Dall <cdall@linaro.org>
2017-05-15 11:32:04 +02:00
Marc Zyngier
3d6e77ad14 KVM: arm/arm64: vgic-v3: Do not use Active+Pending state for a HW interrupt
When an interrupt is injected with the HW bit set (indicating that
deactivation should be propagated to the physical distributor),
special care must be taken so that we never mark the corresponding
LR with the Active+Pending state (as the pending state is kept in
the physycal distributor).

Cc: stable@vger.kernel.org
Fixes: 59529f69f5 ("KVM: arm/arm64: vgic-new: Add GICv3 world switch backend")
Signed-off-by: Marc Zyngier <marc.zyngier@arm.com>
Reviewed-by: Christoffer Dall <cdall@linaro.org>
Signed-off-by: Christoffer Dall <cdall@linaro.org>
2017-05-15 11:31:51 +02:00
Marc Zyngier
ddf42d068f KVM: arm/arm64: vgic-v2: Do not use Active+Pending state for a HW interrupt
When an interrupt is injected with the HW bit set (indicating that
deactivation should be propagated to the physical distributor),
special care must be taken so that we never mark the corresponding
LR with the Active+Pending state (as the pending state is kept in
the physycal distributor).

Cc: stable@vger.kernel.org
Fixes: 140b086dd1 ("KVM: arm/arm64: vgic-new: Add GICv2 world switch backend")
Signed-off-by: Marc Zyngier <marc.zyngier@arm.com>
Reviewed-by: Christoffer Dall <cdall@linaro.org>
Signed-off-by: Christoffer Dall <cdall@linaro.org>
2017-05-15 11:31:43 +02:00
Michael Neuling
f48e91e87e powerpc/tm: Fix FP and VMX register corruption
In commit dc3106690b ("powerpc: tm: Always use fp_state and vr_state
to store live registers"), a section of code was removed that copied
the current state to checkpointed state. That code should not have been
removed.

When an FP (Floating Point) unavailable is taken inside a transaction,
we need to abort the transaction. This is because at the time of the
tbegin, the FP state is bogus so the state stored in the checkpointed
registers is incorrect. To fix this, we treclaim (to get the
checkpointed GPRs) and then copy the thread_struct FP live state into
the checkpointed state. We then trecheckpoint so that the FP state is
correctly restored into the CPU.

The copying of the FP registers from live to checkpointed is what was
missing.

This simplifies the logic slightly from the original patch.
tm_reclaim_thread() will now always write the checkpointed FP
state. Either the checkpointed FP state will be written as part of
the actual treclaim (in tm.S), or it'll be a copy of the live
state. Which one we use is based on MSR[FP] from userspace.

Similarly for VMX.

Fixes: dc3106690b ("powerpc: tm: Always use fp_state and vr_state to store live registers")
Cc: stable@vger.kernel.org # 4.9+
Signed-off-by: Michael Neuling <mikey@neuling.org>
Reviewed-by: cyrilbur@gmail.com
Signed-off-by: Michael Ellerman <mpe@ellerman.id.au>
2017-05-15 19:31:38 +10:00
Marc Zyngier
501ad27c67 arm: KVM: Do not use stack-protector to compile HYP code
We like living dangerously. Nothing explicitely forbids stack-protector
to be used in the HYP code, while distributions routinely compile their
kernel with it. We're just lucky that no code actually triggers the
instrumentation.

Let's not try our luck for much longer, and disable stack-protector
for code living at HYP.

Cc: stable@vger.kernel.org
Signed-off-by: Marc Zyngier <marc.zyngier@arm.com>
Acked-by: Christoffer Dall <cdall@linaro.org>
Signed-off-by: Christoffer Dall <cdall@linaro.org>
2017-05-15 11:31:38 +02:00
Michael Ellerman
43e24e82f3 powerpc/modules: If mprofile-kernel is enabled add it to vermagic
On powerpc we can build the kernel with two different ABIs for mcount(), which
is used by ftrace. Kernels built with one ABI do not know how to load modules
built with the other ABI. The new style ABI is called "mprofile-kernel", for
want of a better name.

Currently if we build a module using the old style ABI, and the kernel with
mprofile-kernel, when we load the module we'll oops something like:

  # insmod autofs4-no-mprofile-kernel.ko
  ftrace-powerpc: Unexpected instruction f8810028 around bl _mcount
  ------------[ cut here ]------------
  WARNING: CPU: 6 PID: 3759 at ../kernel/trace/ftrace.c:2024 ftrace_bug+0x2b8/0x3c0
  CPU: 6 PID: 3759 Comm: insmod Not tainted 4.11.0-rc3-gcc-5.4.1-00017-g5a61ef74f269 #11
  ...
  NIP [c0000000001eaa48] ftrace_bug+0x2b8/0x3c0
  LR [c0000000001eaff8] ftrace_process_locs+0x4a8/0x590
  Call Trace:
    alloc_pages_current+0xc4/0x1d0 (unreliable)
    ftrace_process_locs+0x4a8/0x590
    load_module+0x1c8c/0x28f0
    SyS_finit_module+0x110/0x140
    system_call+0x38/0xfc
  ...
  ftrace failed to modify
  [<d000000002a31024>] 0xd000000002a31024
   actual:   35:65:00:48

We can avoid this by including in the vermagic whether the kernel/module was
built with mprofile-kernel. Which results in:

  # insmod autofs4-pg.ko
  autofs4: version magic
  '4.11.0-rc3-gcc-5.4.1-00017-g5a61ef74f269 SMP mod_unload modversions '
  should be
  '4.11.0-rc3-gcc-5.4.1-00017-g5a61ef74f269-dirty SMP mod_unload modversions mprofile-kernel'
  insmod: ERROR: could not insert module autofs4-pg.ko: Invalid module format

Fixes: 8c50b72a3b ("powerpc/ftrace: Add Kconfig & Make glue for mprofile-kernel")
Signed-off-by: Michael Ellerman <mpe@ellerman.id.au>
Acked-by: Balbir Singh <bsingharora@gmail.com>
Acked-by: Jessica Yu <jeyu@redhat.com>
Signed-off-by: Michael Ellerman <mpe@ellerman.id.au>
2017-05-15 19:31:38 +10:00
Marc Zyngier
cde13b5dad arm64: KVM: Do not use stack-protector to compile EL2 code
We like living dangerously. Nothing explicitely forbids stack-protector
to be used in the EL2 code, while distributions routinely compile their
kernel with it. We're just lucky that no code actually triggers the
instrumentation.

Let's not try our luck for much longer, and disable stack-protector
for code living at EL2.

Cc: stable@vger.kernel.org
Signed-off-by: Marc Zyngier <marc.zyngier@arm.com>
Acked-by: Christoffer Dall <cdall@linaro.org>
Signed-off-by: Christoffer Dall <cdall@linaro.org>
2017-05-15 11:31:16 +02:00
Guenter Roeck
050161ea32 staging: typec: tcpm: Fix Port Power Role field in PS_RDY messages
PS_RDY messages sent during power swap sequences are expected to reflect
the new power role.

Signed-off-by: Guenter Roeck <linux@roeck-us.net>
Signed-off-by: Greg Kroah-Hartman <gregkh@linuxfoundation.org>
2017-05-15 11:23:56 +02:00
Guenter Roeck
193a68011f staging: typec: tcpm: Respond to Discover Identity commands
If the lower level driver provided a list of VDOs in its configuration
data, send it to the partner as response to a Discover Identity command
if in device mode (UFP).

Cc: Yueyao Zhu <yueyao.zhu@gmail.com>
Originally-from: Puma Hsu <puma_hsu@htc.com>
Signed-off-by: Guenter Roeck <linux@roeck-us.net>
Signed-off-by: Greg Kroah-Hartman <gregkh@linuxfoundation.org>
2017-05-15 11:23:56 +02:00
Guenter Roeck
931693f973 staging: typec: tcpm: Set correct flags in PD request messages
We do support USB PD communication, and devices supported by this driver
typically use USB power for purposes other than USB communication.

Originally-from: Puma Hsu <puma_hsu@htc.com>
Cc: Yueyao Zhu <yueyao.zhu@gmail.com>
Signed-off-by: Guenter Roeck <linux@roeck-us.net>
Signed-off-by: Greg Kroah-Hartman <gregkh@linuxfoundation.org>
2017-05-15 11:23:56 +02:00
Guenter Roeck
5fec4b54d0 staging: typec: tcpm: Drop duplicate PD messages
Per USB PD standard, we have to drop duplicate PD messages.
We can not expect lower protocol layers to drop such messages,
since lower layers don't know if a message was dropped somewhere
else in the stack.

Originally-from: Puma Hsu <puma_hsu@htc.com>
Cc: Yueyao Zhu <yueyao.zhu@gmail.com>
Signed-off-by: Guenter Roeck <linux@roeck-us.net>
Signed-off-by: Greg Kroah-Hartman <gregkh@linuxfoundation.org>
2017-05-15 11:23:55 +02:00
Yueyao Zhu
aac53ee455 staging: typec: fusb302: Fix chip->vbus_present init value
FUSB_REG_STATUS0 & FUSB_REG_STATUS0_VBUSOK = 0x40 & 0x80 is always
zero. Fix the code to what it is intended to be: check the VBUSOK
bit of the value read from address FUSB_REG_STATUS0.

Reported-by: Dan Carpenter <dan.carpenter@oracle.com>
Cc: Guenter Roeck <linux@roeck-us.net>
Signed-off-by: Yueyao Zhu <yueyao.zhu@gmail.com>
Signed-off-by: Guenter Roeck <linux@roeck-us.net>
Signed-off-by: Greg Kroah-Hartman <gregkh@linuxfoundation.org>
2017-05-15 11:23:55 +02:00
Javier Martinez Canillas
227383f8c2 staging: typec: fusb302: Fix module autoload
If the driver is built as a module, autoload won't work because the module
alias information is not filled. So user-space can't match the registered
device with the corresponding module.

Export the OF and I2C device ID table entries as module aliases, using the
MODULE_DEVICE_TABLE() macro.

Before this patch:

$ modinfo drivers/staging/typec/fusb302/fusb302.ko | grep alias
$

After this patch:

$ modinfo drivers/staging/typec/fusb302/fusb302.ko | grep alias
alias:          of:N*T*Cfcs,fusb302C*
alias:          of:N*T*Cfcs,fusb302
alias:          i2c:typec_fusb302

Signed-off-by: Javier Martinez Canillas <javier@dowhile0.org>
Signed-off-by: Guenter Roeck <linux@roeck-us.net>
Signed-off-by: Greg Kroah-Hartman <gregkh@linuxfoundation.org>
2017-05-15 11:23:55 +02:00
Olivier Leveque
c6a9d3eaee staging: typec: tcpci: declare private structure as static
This fixes a sparse warning regarding an undeclared symbol. Since the
structure tcpci_tcpc_config is private to tcpci.c, it should be declared as
static.

Signed-off-by: Olivier Leveque <o_leveque@orange.fr>
Signed-off-by: Guenter Roeck <linux@roeck-us.net>
Signed-off-by: Greg Kroah-Hartman <gregkh@linuxfoundation.org>
2017-05-15 11:23:55 +02:00
Gilad Ben-Yossef
84817ef091 staging: MAINTAINERS: add GBY as ccree maintainer
I work for Arm on maintaining the TrustZone CryptoCell driver.

Signed-off-by: Gilad Ben-Yossef <gilad@benyossef.com>
Signed-off-by: Greg Kroah-Hartman <gregkh@linuxfoundation.org>
2017-05-15 11:17:31 +02:00
Yisheng Xie
849ff8190e staging/android/ion: remove useless document file
After commit 9828282e33 ("staging: android: ion: Remove old platform
support"), the document about devicetree of ion is no need anymore, so
just remove it.

Signed-off-by: Yisheng Xie <xieyisheng1@huawei.com>
Acked-by: Laura Abbott <labbott@redhat.com>
Signed-off-by: Greg Kroah-Hartman <gregkh@linuxfoundation.org>
2017-05-15 11:17:31 +02:00
Anthony Mallet
bb246681b3 USB: serial: ftdi_sio: fix setting latency for unprivileged users
Commit 557aaa7ffa ("ft232: support the ASYNC_LOW_LATENCY
flag") enables unprivileged users to set the FTDI latency timer,
but there was a logic flaw that skipped sending the corresponding
USB control message to the device.

Specifically, the device latency timer would not be updated until next
open, something which was later also inadvertently broken by commit
c19db4c9e4 ("USB: ftdi_sio: set device latency timeout at port
probe").

A recent commit c6dce26266 ("USB: serial: ftdi_sio: fix extreme
low-latency setting") disabled the low-latency mode by default so we now
need this fix to allow unprivileged users to again enable it.

Signed-off-by: Anthony Mallet <anthony.mallet@laas.fr>
[johan: amend commit message]
Fixes: 557aaa7ffa ("ft232: support the ASYNC_LOW_LATENCY flag")
Fixes: c19db4c9e4 ("USB: ftdi_sio: set device latency timeout at port probe").
Cc: stable <stable@vger.kernel.org>     # 2.6.31
Signed-off-by: Johan Hovold <johan@kernel.org>
2017-05-15 10:20:25 +02:00
Steven Rostedt (VMware)
8663effb24 sched/core: Call __schedule() from do_idle() without enabling preemption
I finally got around to creating trampolines for dynamically allocated
ftrace_ops with using synchronize_rcu_tasks(). For users of the ftrace
function hook callbacks, like perf, that allocate the ftrace_ops
descriptor via kmalloc() and friends, ftrace was not able to optimize
the functions being traced to use a trampoline because they would also
need to be allocated dynamically. The problem is that they cannot be
freed when CONFIG_PREEMPT is set, as there's no way to tell if a task
was preempted on the trampoline. That was before Paul McKenney
implemented synchronize_rcu_tasks() that would make sure all tasks
(except idle) have scheduled out or have entered user space.

While testing this, I triggered this bug:

 BUG: unable to handle kernel paging request at ffffffffa0230077
 ...
 RIP: 0010:0xffffffffa0230077
 ...
 Call Trace:
  schedule+0x5/0xe0
  schedule_preempt_disabled+0x18/0x30
  do_idle+0x172/0x220

What happened was that the idle task was preempted on the trampoline.
As synchronize_rcu_tasks() ignores the idle thread, there's nothing
that lets ftrace know that the idle task was preempted on a trampoline.

The idle task shouldn't need to ever enable preemption. The idle task
is simply a loop that calls schedule or places the cpu into idle mode.
In fact, having preemption enabled is inefficient, because it can
happen when idle is just about to call schedule anyway, which would
cause schedule to be called twice. Once for when the interrupt came in
and was returning back to normal context, and then again in the normal
path that the idle loop is running in, which would be pointless, as it
had already scheduled.

The only reason schedule_preempt_disable() enables preemption is to be
able to call sched_submit_work(), which requires preemption enabled. As
this is a nop when the task is in the RUNNING state, and idle is always
in the running state, there's no reason that idle needs to enable
preemption. But that means it cannot use schedule_preempt_disable() as
other callers of that function require calling sched_submit_work().

Adding a new function local to kernel/sched/ that allows idle to call
the scheduler without enabling preemption, fixes the
synchronize_rcu_tasks() issue, as well as removes the pointless spurious
schedule calls caused by interrupts happening in the brief window where
preemption is enabled just before it calls schedule.

Reviewed: Thomas Gleixner <tglx@linutronix.de>
Signed-off-by: Steven Rostedt (VMware) <rostedt@goodmis.org>
Signed-off-by: Peter Zijlstra (Intel) <peterz@infradead.org>
Acked-by: Paul E. McKenney <paulmck@linux.vnet.ibm.com>
Cc: Andrew Morton <akpm@linux-foundation.org>
Cc: Linus Torvalds <torvalds@linux-foundation.org>
Cc: Peter Zijlstra <peterz@infradead.org>
Cc: Thomas Gleixner <tglx@linutronix.de>
Link: http://lkml.kernel.org/r/20170414084809.3dacde2a@gandalf.local.home
Signed-off-by: Ingo Molnar <mingo@kernel.org>
2017-05-15 10:09:12 +02:00
Daniele Palmas
40dd46048c usb: serial: option: add Telit ME910 support
This patch adds support for Telit ME910 PID 0x1100.

Signed-off-by: Daniele Palmas <dnlplm@gmail.com>
Cc: stable <stable@vger.kernel.org>
Signed-off-by: Johan Hovold <johan@kernel.org>
2017-05-15 10:02:26 +02:00
Marc Zyngier
01630ab854 ARM: KVM: Fix tracepoint generation after move to virt/kvm/arm/
Moving most of the shared code to virt/kvm/arm had for consequence
that KVM/ARM doesn't build anymore, because the code that used to
define the tracepoints is now somewhere else.

Fix this by defining CREATE_TRACE_POINTS in coproc.c, and clean-up
trace.h as well.

Fixes: 35d2d5d490 ("KVM: arm/arm64: Move shared files to virt/kvm/arm")
Reported-by: Arnd Bergmann <arnd@arndb.de>
Signed-off-by: Marc Zyngier <marc.zyngier@arm.com>
Signed-off-by: Christoffer Dall <cdall@linaro.org>
2017-05-15 08:58:50 +02:00
Joe Thornber
2e63309507 dm cache policy smq: don't do any writebacks unless IDLE
If there are no clean blocks to be demoted the writeback will be
triggered at that point.  Preemptively writing back can hurt high IO
load scenarios.

Signed-off-by: Joe Thornber <ejt@redhat.com>
Signed-off-by: Mike Snitzer <snitzer@redhat.com>
2017-05-14 21:54:33 -04:00
Joe Thornber
49b7f76890 dm cache: simplify the IDLE vs BUSY state calculation
Drop the MODERATE state since it wasn't buying us much.

Also, in check_migrations(), prepare for the next commit ("dm cache
policy smq: don't do any writebacks unless IDLE") by deferring to the
policy to make the final decision on whether writebacks can be
serviced.

Signed-off-by: Joe Thornber <ejt@redhat.com>
Signed-off-by: Mike Snitzer <snitzer@redhat.com>
2017-05-14 21:54:33 -04:00
Joe Thornber
701e03e4e1 dm cache: track all IO to the cache rather than just the origin device's IO
IO tracking used to throttle writebacks when the origin device is busy.

Even if all the IO is going to the fast device, writebacks can
significantly degrade performance.  So track all IO to gauge whether the
cache is busy or not.

Otherwise, synthetic IO tests (e.g. fio) that might send all IO to the
fast device wouldn't cause writebacks to get throttled.

Signed-off-by: Joe Thornber <ejt@redhat.com>
Signed-off-by: Mike Snitzer <snitzer@redhat.com>
2017-05-14 21:54:33 -04:00
Joe Thornber
6cf4cc8f8b dm cache policy smq: stop preemptively demoting blocks
It causes a lot of churn if the working set's size is close to the fast
device's size.

Signed-off-by: Joe Thornber <ejt@redhat.com>
Signed-off-by: Mike Snitzer <snitzer@redhat.com>
2017-05-14 21:54:33 -04:00
Joe Thornber
4d44ec5ab7 dm cache policy smq: put newly promoted entries at the top of the multiqueue
This stops entries bouncing in and out of the cache quickly.

Signed-off-by: Joe Thornber <ejt@redhat.com>
Signed-off-by: Mike Snitzer <snitzer@redhat.com>
2017-05-14 21:54:33 -04:00
Joe Thornber
78c45607b9 dm cache policy smq: be more aggressive about triggering a writeback
If there are no clean entries to demote we really want to writeback
immediately.

Signed-off-by: Joe Thornber <ejt@redhat.com>
Signed-off-by: Mike Snitzer <snitzer@redhat.com>
2017-05-14 21:54:32 -04:00
Joe Thornber
a8cd1eba61 dm cache policy smq: only demote entries in bottom half of the clean multiqueue
Heavy IO load may mean there are very few clean blocks in the cache, and
we risk demoting entries that get hit a lot.

Signed-off-by: Joe Thornber <ejt@redhat.com>
Signed-off-by: Mike Snitzer <snitzer@redhat.com>
2017-05-14 21:54:32 -04:00
Joe Thornber
072792dcdf dm cache: fix incorrect 'idle_time' reset in IO tracker
Some bios have no payload (eg, a FLUSH), don't reset the idle_time when
these come in.

Signed-off-by: Joe Thornber <ejt@redhat.com>
Signed-off-by: Mike Snitzer <snitzer@redhat.com>
2017-05-14 21:53:11 -04:00
Arnd Bergmann
e23c7f7d57 soc: imx: add PM dependency for IMX7_PM_DOMAINS
The new pm domain driver causes a build failure when CONFIG_PM
is not set:

warning: (IMX7_PM_DOMAINS) selects PM_GENERIC_DOMAINS which has unmet direct dependencies (PM)
drivers/base/power/domain_governor.c: In function 'default_suspend_ok':
drivers/base/power/domain_governor.c:75:17: error: 'struct dev_pm_info' has no member named 'ignore_children'

This adds a dependency to ensure that we don't attempt to build the
driver without CONFIG_PM.

Fixes: 03aa12629f ("soc: imx: Add GPCv2 power gating driver")
Signed-off-by: Arnd Bergmann <arnd@arndb.de>
Reviewed-by: Fabio Estevam <fabio.estevam@nxp.com>
Signed-off-by: Shawn Guo <shawnguo@kernel.org>
2017-05-15 09:33:22 +08:00
Leonard Crestez
d8581c7c8b ARM: dts: imx6sx-sdb: Remove OPP override
The board file for imx6sx-sdb overrides cpufreq operating points to use
higher voltages. This is done because the board has a shared rail for
VDD_ARM_IN and VDD_SOC_IN and when using LDO bypass the shared voltage
needs to be a value suitable for both ARM and SOC.

This only applies to LDO bypass mode, a feature not present in upstream.
When LDOs are enabled the effect is to use higher voltages than necessary
for no good reason.

Setting these higher voltages can make some boards fail to boot with ugly
semi-random crashes reminiscent of memory corruption. These failures only
happen on board rev. C, rev. B is reported to still work.

Signed-off-by: Leonard Crestez <leonard.crestez@nxp.com>
Fixes: 54183bd7f7 ("ARM: imx6sx-sdb: add revb board and make it default")
Cc: stable@vger.kernel.org
Signed-off-by: Shawn Guo <shawnguo@kernel.org>
2017-05-15 09:33:22 +08:00
Fabio Estevam
2fe4bff351 ARM: dts: imx53-qsrb: Pulldown PMIC IRQ pin
Currently the following errors are seen:

[   14.015056] mc13xxx 0-0008: Failed to read IRQ status: -6
[   27.321093] mc13xxx 0-0008: Failed to read IRQ status: -6
[   27.411681] mc13xxx 0-0008: Failed to read IRQ status: -6
[   27.456281] mc13xxx 0-0008: Failed to read IRQ status: -6
[   30.527106] mc13xxx 0-0008: Failed to read IRQ status: -6
[   36.596900] mc13xxx 0-0008: Failed to read IRQ status: -6

Also when reading the interrupts via 'cat /proc/interrupts' the
PMIC GPIO interrupt counter does not stop increasing.

The reason for the storm of interrupts is that the PUS field of
register IOMUXC_SW_PAD_CTL_PAD_CSI0_DAT5 is currently configured as:
10 : 100k pullup

and the PMIC interrupt is being registered as IRQ_TYPE_LEVEL_HIGH type,
which is the correct type as per the MC34708 datasheet.

Use the default power on value for the IOMUX, which sets PUS field as:
00: 360k pull down

This prevents the spurious PMIC interrupts from happening.

Commit e1ffceb078 ("ARM: imx53: qsrb: fix PMIC interrupt level")
correctly described the irq type as IRQ_TYPE_LEVEL_HIGH, but
missed to update the IOMUX of the PMIC GPIO as pull down.

Fixes: e1ffceb078 ("ARM: imx53: qsrb: fix PMIC interrupt level")
Signed-off-by: Fabio Estevam <fabio.estevam@nxp.com>
Signed-off-by: Shawn Guo <shawnguo@kernel.org>
2017-05-15 09:33:22 +08:00
Thomas Gleixner
90b4f30b6d hwmon: (coretemp) Handle frozen hotplug state correctly
The recent conversion to the hotplug state machine missed that the original
hotplug notifiers did not execute in the frozen state, which is used on
suspend on resume.

This does not matter on single socket machines, but on multi socket systems
this breaks when the device for a non-boot socket is removed when the last
CPU of that socket is brought offline. The device removal locks up the
machine hard w/o any debug output.

Prevent executing the hotplug callbacks when cpuhp_tasks_frozen is true.

Thanks to Tommi for providing debug information patiently while I failed to
spot the obvious.

Fixes: e00ca5df37 ("hwmon: (coretemp) Convert to hotplug state machine")
Reported-by: Tommi Rantala <tt.rantala@gmail.com>
Tested-by: Tommi Rantala <tt.rantala@gmail.com>
Signed-off-by: Thomas Gleixner <tglx@linutronix.de>
Signed-off-by: Guenter Roeck <linux@roeck-us.net>
2017-05-14 07:49:32 -07:00
Yishai Hadas
508541146a net/mlx5: Use underlay QPN from the root name space
Root flow table is dynamically changed by the underlying flow steering
layer, and IPoIB/ULPs have no idea what will be the root flow table in
the future, hence we need a dynamic infrastructure to move Underlay QPs
with the root flow table.

Fixes: b3ba51498b ("net/mlx5: Refactor create flow table method to accept underlay QP")
Signed-off-by: Erez Shitrit <erezsh@mellanox.com>
Signed-off-by: Maor Gottlieb <maorg@mellanox.com>
Signed-off-by: Yishai Hadas <yishaih@mellanox.com>
Signed-off-by: Saeed Mahameed <saeedm@mellanox.com>
2017-05-14 13:33:45 +03:00
Saeed Mahameed
5360fd473c net/mlx5e: IPoIB, Only support regular RQ for now
IPoIB doesn't support striding RQ at the moment, for this
we need to explicitly choose non striding RQ in IPoIB init,
even if the HW supports it.

Fixes: 8f493ffd88 ("net/mlx5e: IPoIB, RX steering RSS RQTs and TIRs")
Signed-off-by: Saeed Mahameed <saeedm@mellanox.com>
2017-05-14 13:33:45 +03:00
Saeed Mahameed
20b6a1c782 net/mlx5e: Fix setup TC ndo
Fail-safe support patches introduced a trivial bug,
setup tc callback is doing a wrong check of the netdevice state,
the fix is simply to invert the condition.

Fixes: 6f9485af40 ("net/mlx5e: Fail safe tc setup")
Signed-off-by: Saeed Mahameed <saeedm@mellanox.com>
2017-05-14 13:33:45 +03:00
Gal Pressman
e3c1950371 net/mlx5e: Fix ethtool pause support and advertise reporting
Pause bit should set when RX pause is on, not TX pause.
Also, setting Asym_Pause is incorrect, and should be turned off.

Fixes: 665bc53969 ("net/mlx5e: Use new ethtool get/set link ksettings API")
Signed-off-by: Gal Pressman <galp@mellanox.com>
Cc: kernel-team@fb.com
Signed-off-by: Saeed Mahameed <saeedm@mellanox.com>
2017-05-14 13:33:45 +03:00
Gal Pressman
b383b544f2 net/mlx5e: Use the correct pause values for ethtool advertising
Query the operational pause from firmware (PFCC register) instead of
always passing zeros.

Fixes: 665bc53969 ("net/mlx5e: Use new ethtool get/set link ksettings API")
Signed-off-by: Gal Pressman <galp@mellanox.com>
Cc: kernel-team@fb.com
Signed-off-by: Saeed Mahameed <saeedm@mellanox.com>
2017-05-14 13:33:45 +03:00
Florian Fainelli
31d848aa1d soc: bcm: brcmstb: Correctly match 7435 SoC
Remove the duplicate brcm,bcm7425-sun-top-ctrl compatible string and
replace it with brcm,bcm7435-sun-top-ctrl which was intended.

Fixes: bd0faf08dc ("soc: bcm: brcmstb: Match additional compatible strings")
Reported-by: Andreas Oberritter <obi@saftware.de>
Acked-by: Gregory Fong <gregory.0xf0@gmail.com>
Signed-off-by: Florian Fainelli <f.fainelli@gmail.com>
2017-05-13 20:27:33 -07:00
Florian Fainelli
b155f05dc5 This pull request brings back bcm2835 DT fixups from Baruch Siach that
got misplaced after a PR for 4.11 got rejected.
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Merge tag 'bcm2835-dt-next-2017-03-30' into devicetree/fixes

This pull request brings back bcm2835 DT fixups from Baruch Siach that
got misplaced after a PR for 4.11 got rejected.

Signed-off-by: Florian Fainelli <f.fainelli@gmail.com>
2017-05-13 20:26:09 -07:00
Dan Williams
f5705aa8cf dax, xfs, ext4: compile out iomap-dax paths in the FS_DAX=n case
Tetsuo reports:

  fs/built-in.o: In function `xfs_file_iomap_end':
  xfs_iomap.c:(.text+0xe0ef9): undefined reference to `put_dax'
  fs/built-in.o: In function `xfs_file_iomap_begin':
  xfs_iomap.c:(.text+0xe1a7f): undefined reference to `dax_get_by_host'
  make: *** [vmlinux] Error 1
  $ grep DAX .config
  CONFIG_DAX=m
  # CONFIG_DEV_DAX is not set
  # CONFIG_FS_DAX is not set

When FS_DAX=n we can/must throw away the dax code in filesystems.
Implement 'fs_' versions of dax_get_by_host() and put_dax() that are
nops in the FS_DAX=n case.

Cc: <linux-xfs@vger.kernel.org>
Cc: <linux-ext4@vger.kernel.org>
Cc: Jan Kara <jack@suse.com>
Cc: "Theodore Ts'o" <tytso@mit.edu>
Cc: "Darrick J. Wong" <darrick.wong@oracle.com>
Cc: Ross Zwisler <ross.zwisler@linux.intel.com>
Tested-by: Tony Luck <tony.luck@intel.com>
Fixes: ef51042472 ("block, dax: move 'select DAX' from BLOCK to FS_DAX")
Reported-by: Tetsuo Handa <penguin-kernel@i-love.sakura.ne.jp>
Signed-off-by: Dan Williams <dan.j.williams@intel.com>
2017-05-13 17:52:16 -07:00