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The change in commit 1e2f82d1e9d1 ("statx: Kill fd-with-NULL-path
support in favour of AT_EMPTY_PATH") to error on a NULL pathname to
statx() is inconsistent.
It results in the error EINVAL for a NULL pathname. Other system calls
with similar APIs (fchownat(), fstatat(), linkat()), return EFAULT.
The solution is simply to remove the EINVAL check. As I already pointed
out in [1], user_path_at*() and filename_lookup() will handle the NULL
pathname as per the other APIs, to correctly produce the error EFAULT.
[1] https://lkml.org/lkml/2017/4/26/561
Signed-off-by: Michael Kerrisk <mtk.manpages@gmail.com>
Cc: David Howells <dhowells@redhat.com>
Cc: Al Viro <viro@zeniv.linux.org.uk>
Cc: Eric Sandeen <sandeen@sandeen.net>
Signed-off-by: Linus Torvalds <torvalds@linux-foundation.org>
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for-4.12/post-merge
Christoph writes:
"A couple more updates for 4.12. The biggest pile is fc and lpfc
updates from James, but there are various small fixes and cleanups as
well."
Fixes up a few merge issues, and also a warning in
lpfc_nvmet_rcv_unsol_abort() if CONFIG_NVME_TARGET_FC isn't enabled.
Signed-off-by: Jens Axboe <axboe@fb.com>
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Add option to xdp1 and xdp_tx_iptunnel to insert xdp program in
SKB_MODE:
- update set_link_xdp_fd to take a flags argument that is added to the
RTM_SETLINK message
- Add -S option to xdp1 and xdp_tx_iptunnel user code. When passed in
XDP_FLAGS_SKB_MODE is set in the flags arg passed to set_link_xdp_fd
Signed-off-by: David Ahern <dsa@cumulusnetworks.com>
Acked-by: Alexei Starovoitov <ast@kernel.org>
Signed-off-by: David S. Miller <davem@davemloft.net>
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Signed-off-by: Christoph Hellwig <hch@lst.de>
Signed-off-by: Bjorn Helgaas <bhelgaas@google.com>
Acked-by: Jeff Kirsher <jeffrey.t.kirsher@intel.com>
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The log2 of sectors_per_block was already calculated, so we don't have
to use the ilog2 function.
Signed-off-by: Mikulas Patocka <mpatocka@redhat.com>
Signed-off-by: Mike Snitzer <snitzer@redhat.com>
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Signed-off-by: Mikulas Patocka <mpatocka@redhat.com>
Signed-off-by: Mike Snitzer <snitzer@redhat.com>
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There is no need to have a duplication of the generic library, i.e. hex2bin().
Replace the open coded variant.
Signed-off-by: Andy Shevchenko <andy.shevchenko@gmail.com>
Tested-by: Milan Broz <gmazyland@gmail.com>
Signed-off-by: Mike Snitzer <snitzer@redhat.com>
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When max_size is not set or if it set to a sufficiently large
value, the nelems counter can overflow. This would cause havoc
with the automatic shrinking as it would then attempt to fit a
huge number of entries into a tiny hash table.
This patch fixes this by adding max_elems to struct rhashtable
to cap the number of elements. This is set to 2^31 as nelems is
not a precise count. This is sufficiently smaller than UINT_MAX
that it should be safe.
When max_size is set max_elems will be lowered to at most twice
max_size as is the status quo.
Signed-off-by: Herbert Xu <herbert@gondor.apana.org.au>
Signed-off-by: David S. Miller <davem@davemloft.net>
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I wrongly assumed tp->tcp_mstamp was up to date at the time
tcp_rack_reo_timeout() was called.
It is not true, since we only update tcp->tcp_mstamp when receiving
a packet (as initially done in commit 69e996c58a35 ("tcp: add
tp->tcp_mstamp field")
tcp_rack_reo_timeout() being called by a timer and not an incoming
packet, we need to refresh tp->tcp_mstamp
Fixes: 7c1c7308592f ("tcp: do not pass timestamp to tcp_rack_detect_loss()")
Signed-off-by: Eric Dumazet <edumazet@google.com>
Cc: Soheil Hassas Yeganeh <soheil@google.com>
Cc: Neal Cardwell <ncardwell@google.com>
Cc: Yuchung Cheng <ycheng@google.com>
Acked-by: Soheil Hassas Yeganeh <soheil@google.com>
Acked-by: Neal Cardwell <ncardwell@google.com>
Signed-off-by: David S. Miller <davem@davemloft.net>
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git://git.kernel.org/pub/scm/linux/kernel/git/kvmarm/kvmarm into HEAD
KVM/ARM Changes for v4.12.
Changes include:
- Using the common sysreg definitions between KVM and arm64
- Improved hyp-stub implementation with support for kexec and kdump on the 32-bit side
- Proper PMU exception handling
- Performance improvements of our GIC handling
- Support for irqchip in userspace with in-kernel arch-timers and PMU support
- A fix for a race condition in our PSCI code
Conflicts:
Documentation/virtual/kvm/api.txt
include/uapi/linux/kvm.h
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According to the Intel SDM, "Certain exceptions have priority over VM
exits. These include invalid-opcode exceptions, faults based on
privilege level*, and general-protection exceptions that are based on
checking I/O permission bits in the task-state segment (TSS)."
There is no need to check for faulting conditions that the hardware
has already checked.
* These include faults generated by attempts to execute, in
virtual-8086 mode, privileged instructions that are not recognized
in that mode.
Signed-off-by: Jim Mattson <jmattson@google.com>
Signed-off-by: Paolo Bonzini <pbonzini@redhat.com>
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On AMD, the effect of set_nmi_mask called by emulate_iret_real and em_rsm
on hflags is reverted later on in x86_emulate_instruction where hflags are
overwritten with ctxt->emul_flags (the kvm_set_hflags call). This manifests
as a hang when rebooting Windows VMs with QEMU, OVMF, and >1 vcpu.
Instead of trying to merge ctxt->emul_flags into vcpu->arch.hflags after
an instruction is emulated, this commit deletes emul_flags altogether and
makes the emulator access vcpu->arch.hflags using two new accessors. This
way all changes, on the emulator side as well as in functions called from
the emulator and accessing vcpu state with emul_to_vcpu, are preserved.
More details on the bug and its manifestation with Windows and OVMF:
It's a KVM bug in the interaction between SMI/SMM and NMI, specific to AMD.
I believe that the SMM part explains why we started seeing this only with
OVMF.
KVM masks and unmasks NMI when entering and leaving SMM. When KVM emulates
the RSM instruction in em_rsm, the set_nmi_mask call doesn't stick because
later on in x86_emulate_instruction we overwrite arch.hflags with
ctxt->emul_flags, effectively reverting the effect of the set_nmi_mask call.
The AMD-specific hflag of interest here is HF_NMI_MASK.
When rebooting the system, Windows sends an NMI IPI to all but the current
cpu to shut them down. Only after all of them are parked in HLT will the
initiating cpu finish the restart. If NMI is masked, other cpus never get
the memo and the initiating cpu spins forever, waiting for
hal!HalpInterruptProcessorsStarted to drop. That's the symptom we observe.
Fixes: a584539b24b8 ("KVM: x86: pass the whole hflags field to emulator and back")
Signed-off-by: Ladi Prosek <lprosek@redhat.com>
Signed-off-by: Paolo Bonzini <pbonzini@redhat.com>
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For the better test coverage of cpufreq driver code these extra
configurations are needed. Enable cpufreq governors and stats.
Signed-off-by: Naresh Kamboju <naresh.kamboju@linaro.org>
Acked-by: Viresh Kumar <viresh.kumar@linaro.org>
Signed-off-by: Shuah Khan <shuahkh@osg.samsung.com>
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Add override with EXTRA_CLEAN for lib.mk clean to fix the following
warnings from clean target run.
Makefile:44: warning: overriding recipe for target 'clean'
../lib.mk:55: warning: ignoring old recipe for target 'clean'
Signed-off-by: Shuah Khan <shuahkh@osg.samsung.com>
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Add override with EXTRA_CLEAN for lib.mk clean to fix the following
warnings from clean target run.
Makefile:24: warning: overriding recipe for target 'clean'
../lib.mk:55: warning: ignoring old recipe for target 'clean'
Signed-off-by: Shuah Khan <shuahkh@osg.samsung.com>
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Add override with EXTRA_CLEAN for lib.mk clean to fix the following
warnings from clean target run.
Makefile:8: warning: overriding recipe for target 'clean'
../lib.mk:55: warning: ignoring old recipe for target 'clean'
Signed-off-by: Shuah Khan <shuahkh@osg.samsung.com>
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At least one driver, mtip32xx, has a hard coded dependency on
the value of the reserved tag used for internal commands. While
that should really be fixed up, for now let's ensure that we just
bypass the scheduler tags an allocation marked as reserved. They
are used for house keeping or error handling, so we can safely
ignore them in the scheduler.
Tested-by: Ming Lei <ming.lei@redhat.com>
Signed-off-by: Jens Axboe <axboe@fb.com>
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mtip32xx supposes that 'request_idx' passed to .init_request()
is tag of the request, and use that as request's tag to initialize
command header.
After MQ IO scheduler is in, request tag assigned isn't same with
the request index anymore, so cause strange hardware failure on
mtip32xx, even whole system panic is triggered.
This patch fixes the issue by initializing command header via
request's real tag.
Signed-off-by: Ming Lei <ming.lei@redhat.com>
Signed-off-by: Jens Axboe <axboe@fb.com>
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kvm_make_all_requests() provides a synchronization that waits until all
kicked VCPUs have acknowledged the kick. This is important for
KVM_REQ_MMU_RELOAD as it prevents freeing while lockless paging is
underway.
This patch adds the synchronization property into all requests that are
currently being used with kvm_make_all_requests() in order to preserve
the current behavior and only introduce a new framework. Removing it
from requests where it is not necessary is left for future patches.
Signed-off-by: Radim Krčmář <rkrcmar@redhat.com>
Signed-off-by: Paolo Bonzini <pbonzini@redhat.com>
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Split ftrace_64.S further retaining the core ftrace 64-bit aspects
in ftrace_64.S and moving ftrace_caller() and ftrace_graph_caller() into
separate files based on -mprofile-kernel. The livepatch routines are all
now contained within the mprofile file.
Signed-off-by: Naveen N. Rao <naveen.n.rao@linux.vnet.ibm.com>
Signed-off-by: Michael Ellerman <mpe@ellerman.id.au>
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entry_*.S now includes a lot more than just kernel entry/exit code. As a
first step at cleaning this up, let's split out the ftrace bits into
separate files. Also move all related tracing code into a new trace/
subdirectory.
No functional changes.
Suggested-by: Michael Ellerman <mpe@ellerman.id.au>
Signed-off-by: Naveen N. Rao <naveen.n.rao@linux.vnet.ibm.com>
Signed-off-by: Michael Ellerman <mpe@ellerman.id.au>
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Page table dump debugfs file is named 'kernel_page_tables' on
all other architectures implementing it, while is is named
'kernel_pagetables' on powerpc. This patch renames it.
Signed-off-by: Christophe Leroy <christophe.leroy@c-s.fr>
Signed-off-by: Michael Ellerman <mpe@ellerman.id.au>
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Signed-off-by: Christophe Leroy <christophe.leroy@c-s.fr>
Signed-off-by: Michael Ellerman <mpe@ellerman.id.au>
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On some targets, _PAGE_RW is 0 and this is _PAGE_RO which is used.
There is also _PAGE_SHARED that is missing.
Signed-off-by: Christophe Leroy <christophe.leroy@c-s.fr>
Signed-off-by: Michael Ellerman <mpe@ellerman.id.au>
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On PPC32 (eg. mpc885_ads_defconfig), page table dump compilation fails as
follows. This is because the memory layout is slightly different on PPC32. This
patch adapts it.
arch/powerpc/mm/dump_linuxpagetables.c: In function 'walk_pagetables':
arch/powerpc/mm/dump_linuxpagetables.c:369:10: error: 'KERN_VIRT_START' undeclared (first use in this function)
...
Fixes: 8eb07b187000d ("powerpc/mm: Dump linux pagetables")
Signed-off-by: Christophe Leroy <christophe.leroy@c-s.fr>
Signed-off-by: Michael Ellerman <mpe@ellerman.id.au>
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_tlbiel_pid() is called with a ric (Radix Invalidation Control) argument of
either RIC_FLUSH_TLB or RIC_FLUSH_ALL.
RIC_FLUSH_ALL says to invalidate the entire TLB and the Page Walk Cache (PWC).
To flush the whole TLB, we have to iterate over each set (congruence class) of
the TLB. Currently we do that and pass RIC_FLUSH_ALL each time. That is not
incorrect but it means we flush the PWC 128 times, when once would suffice.
Fix it by doing the first flush with the ric value we're passed, and then if it
was RIC_FLUSH_ALL, we downgrade it to RIC_FLUSH_TLB, because we know we have
just flushed the PWC and don't need to do it again.
Signed-off-by: Aneesh Kumar K.V <aneesh.kumar@linux.vnet.ibm.com>
[mpe: Split out of combined patch, tweak logic, rewrite change log]
Signed-off-by: Michael Ellerman <mpe@ellerman.id.au>
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Currently we implement flushing of the page walk cache (PWC) by calling
_tlbiel_pid() with a RIC (Radix Invalidation Control) value of 1 which says to
only flush the PWC.
But _tlbiel_pid() loops over each set (congruence class) of the TLB, which is
not necessary when we're just flushing the PWC.
In fact the set argument is ignored for a PWC flush, so essentially we're just
flushing the PWC 127 extra times for no benefit.
Fix it by adding tlbiel_pwc() which just does a single flush of the PWC.
Signed-off-by: Aneesh Kumar K.V <aneesh.kumar@linux.vnet.ibm.com>
[mpe: Split out of combined patch, drop _ in name, rewrite change log]
Signed-off-by: Michael Ellerman <mpe@ellerman.id.au>
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No need to kick a VCPU that we have just woken up.
Signed-off-by: Radim Krčmář <rkrcmar@redhat.com>
Reviewed-by: Andrew Jones <drjones@redhat.com>
Signed-off-by: Paolo Bonzini <pbonzini@redhat.com>
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kvm_vcpu_kick() must issue a general memory barrier prior to reading
vcpu->mode in order to ensure correctness of the mutual-exclusion
memory barrier pattern used with vcpu->requests. While the cmpxchg
called from kvm_vcpu_kick():
kvm_vcpu_kick
kvm_arch_vcpu_should_kick
kvm_vcpu_exiting_guest_mode
cmpxchg
implies general memory barriers before and after the operation, that
implication is only valid when cmpxchg succeeds. We need an explicit
barrier for when it fails, otherwise a VCPU thread on its entry path
that reads zero for vcpu->requests does not exclude the possibility
the requesting thread sees !IN_GUEST_MODE when it reads vcpu->mode.
kvm_make_all_cpus_request already had a barrier, so we remove it, as
now it would be redundant.
Signed-off-by: Andrew Jones <drjones@redhat.com>
Signed-off-by: Paolo Bonzini <pbonzini@redhat.com>
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Leave it to the user to decide whether to enable this or not. Otherwise,
platform-specific drivers won't initialize (currently, EDAC supports
only a single platform driver loaded).
Signed-off-by: Borislav Petkov <bp@suse.de>
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We want to have kvm_make_all_cpus_request() to be an optmized version of
kvm_for_each_vcpu(i, vcpu, kvm) {
kvm_make_request(vcpu, request);
kvm_vcpu_kick(vcpu);
}
and kvm_vcpu_kick() wakes up the target vcpu. We know which requests do
not need the wake up and use it to optimize the loop.
Thanks to that, this patch doesn't change the behavior of current users
(the all don't need the wake up) and only prepares for future where the
wake up is going to be needed.
I think that most requests do not need the wake up, so we would flip the
bit then.
Later on, kvm_make_request() will take care of kicking too, using this
bit to make the decision whether to kick or not.
Signed-off-by: Radim Krčmář <rkrcmar@redhat.com>
Reviewed-by: Andrew Jones <drjones@redhat.com>
Signed-off-by: Paolo Bonzini <pbonzini@redhat.com>
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Some operations must ensure that the guest is not running with stale
data, but if the guest is halted, then the update can wait until another
event happens. kvm_make_all_requests() currently doesn't wake up, so we
can mark all requests used with it.
First 8 bits were arbitrarily reserved for request numbers.
Most uses of requests have the request type as a constant, so a compiler
will optimize the '&'.
An alternative would be to have an inline function that would return
whether the request needs a wake-up or not, but I like this one better
even though it might produce worse assembly.
Signed-off-by: Radim Krčmář <rkrcmar@redhat.com>
Reviewed-by: Andrew Jones <drjones@redhat.com>
Reviewed-by: Cornelia Huck <cornelia.huck@de.ibm.com>
Signed-off-by: Paolo Bonzini <pbonzini@redhat.com>
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The #ifndef was protecting a missing halt_wakeup stat, but that is no
longer necessary.
Acked-by: Christian Borntraeger <borntraeger@de.ibm.com>
Signed-off-by: Radim Krčmář <rkrcmar@redhat.com>
Reviewed-by: Cornelia Huck <cornelia.huck@de.ibm.com>
Signed-off-by: Paolo Bonzini <pbonzini@redhat.com>
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Reviewed-by: David Hildenbrand <david@redhat.com>
Signed-off-by: Radim Krčmář <rkrcmar@redhat.com>
Reviewed-by: Andrew Jones <drjones@redhat.com>
Signed-off-by: Paolo Bonzini <pbonzini@redhat.com>
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Users were expected to use kvm_check_request() for testing and clearing,
but request have expanded their use since then and some users want to
only test or do a faster clear.
Make sure that requests are not directly accessed with bit operations.
Reviewed-by: Christian Borntraeger <borntraeger@de.ibm.com>
Signed-off-by: Radim Krčmář <rkrcmar@redhat.com>
Reviewed-by: Andrew Jones <drjones@redhat.com>
Reviewed-by: Cornelia Huck <cornelia.huck@de.ibm.com>
Signed-off-by: Paolo Bonzini <pbonzini@redhat.com>
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git://git.kernel.org/pub/scm/linux/kernel/git/kvms390/linux into HEAD
KVM: s390: MSA8 feature for guests
- Detect all function codes for KMA and export the features
for use in the cpu model
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These tests are meaningless as is because "adapt" can't possibly be both
less than 1 and greater than 32.
Fixes: d81ca730e3e4 ("input: touchscreen: mxs-lradc: Add support for touchscreen")
Signed-off-by: Dan Carpenter <dan.carpenter@oracle.com>
Acked-by: Dmitry Torokhov <dmitry.torokhov@gmail.com>
Signed-off-by: Lee Jones <lee.jones@linaro.org>
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AXP803 have the most regulators in currently supported AXP PMICs.
Add info for the regulators in the dt-bindings document.
Signed-off-by: Icenowy Zheng <icenowy@aosc.io>
Acked-by: Rob Herring <robh@kernel.org>
Signed-off-by: Lee Jones <lee.jones@linaro.org>
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AXP803 is a new PMIC chip produced by X-Powers, usually paired with A64
via RSB bus. The PMIC itself is like AXP288, but with RSB support and
dedicated VBUS and ACIN.
Add support for it in the axp20x mfd driver.
Currently only power key function is supported.
Signed-off-by: Icenowy Zheng <icenowy@aosc.io>
Signed-off-by: Lee Jones <lee.jones@linaro.org>
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AXP803 is a PMIC produced by Shenzhen X-Powers, with either I2C or RSB
bus.
Add a compatible for it.
Signed-off-by: Icenowy Zheng <icenowy@aosc.io>
Acked-by: Chen-Yu Tsai <wens@csie.org>
Acked-by: Rob Herring <robh@kernel.org>
Signed-off-by: Lee Jones <lee.jones@linaro.org>
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In the binding documentation of AXP20X mfd, the compatible strings used
to be listed for three per line, which leads to some mess when trying to
add AXP803 compatible string (as we have already AXP806 and AXP809
compatibles, which is after AXP803 in ascending order).
Make the compatible strings one per line, so that inserting a new
compatible string will be directly a new line.
Signed-off-by: Icenowy Zheng <icenowy@aosc.io>
Signed-off-by: Lee Jones <lee.jones@linaro.org>
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unction devm_regmap_init_i2c() returns an ERR_PTR on errors, and its
return value should be checked before it is dereferenced. However, in
function intel_soc_pmic_i2c_probe(), the return value of function
devm_regmap_init_i2c() is used without validation. This patch fixes it.
Signed-off-by: Pan Bian <bianpan2016@163.com>
Signed-off-by: Lee Jones <lee.jones@linaro.org>
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Since
commit e6229bec25be ("rtc: make rtc_update_irq callable with irqs enabled")
rtc_update_irq() is callable with irqs enabled, see the rtc drivers.
So update this accordingly.
Signed-off-by: Martin Kepplinger <martin.kepplinger@ginzinger.com>
Acked-by: Aaro Koskinen <aaro.koskinen@iki.fi>
Signed-off-by: Lee Jones <lee.jones@linaro.org>
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The idle mode needs to be only disabled for UTMIAUTOIDLE while
ULPIAUTOIDLE can be enabled.
This matches the TLL_CHANNEL_CONF_i register configuration for ehci-tll
in the Motorola Linux kernel tree for Wrigley 3G LTE modem on droid 4
and the modem still stays responsive.
Signed-off-by: Tony Lindgren <tony@atomide.com>
Acked-by: Roger Quadros <rogerq@ti.com>
Signed-off-by: Lee Jones <lee.jones@linaro.org>
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Commit 16fa3dc75c22 ("mfd: omap-usb-tll: HOST TLL platform driver")
added support for USB TLL, but uses OMAP_TLL_CHANNEL_CONF_ULPINOBITSTUFF
bit the wrong way. The comments in the code are correct, but the inverted
use of OMAP_TLL_CHANNEL_CONF_ULPINOBITSTUFF causes the register to be
enabled instead of disabled unlike what the comments say.
Without this change the Wrigley 3G LTE modem on droid 4 EHCI bus can
be only pinged few times before it stops responding.
Fixes: 16fa3dc75c22 ("mfd: omap-usb-tll: HOST TLL platform driver")
Signed-off-by: Tony Lindgren <tony@atomide.com>
Acked-by: Roger Quadros <rogerq@ti.com>
Signed-off-by: Lee Jones <lee.jones@linaro.org>
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Fixed a small spelling mistake ("updat" -> "update") in an error message.
Signed-off-by: Willis Monroe <willismonroe@gmail.com>
Signed-off-by: Lee Jones <lee.jones@linaro.org>
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Like Intel Apollo Lake, Gemini Lake exposes the serial SPI flash device BAR
through hidden P2SB PCI device. We use the same mechanism than Apollo Lake
to read the BAR and pass it to the driver.
Signed-off-by: Mika Westerberg <mika.westerberg@linux.intel.com>
Signed-off-by: Lee Jones <lee.jones@linaro.org>
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The hi655x is a PMIC with regulator but also provides a clock for the WiFi
and the bluetooth which is missing in the current implementation.
Add the clock cell so it can be used in the next patch via the dts.
Signed-off-by: Daniel Lezcano <daniel.lezcano@linaro.org>
Signed-off-by: Lee Jones <lee.jones@linaro.org>
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Crystal Cove and Whiskey Cove are two different PMICs which are
installed on Intel Atom SoC based platforms.
Moreover there are two independent drivers that by some reason were
supposed (*) to get into one kernel module.
Fix the mess by clarifying Kconfig option for Crystal Cove and split
Whiskey Cove out of it.
(*) It looks like the configuration was never tested with
INTEL_SOC_PMIC=n. The line in Makefile is actually wrong.
Cc: "Rafael J. Wysocki" <rjw@rjwysocki.net> (supporter:ACPI)
Acked-by: Linus Walleij <linus.walleij@linaro.org>
Acked-by: Zhang Rui <rui.zhang@intel.com>
Signed-off-by: Andy Shevchenko <andriy.shevchenko@linux.intel.com>
Signed-off-by: Lee Jones <lee.jones@linaro.org>
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Convert exisitng lpass-suspend/resume callbacks into runtime PM callbacks.
This way Exynos LPASS driver will be ready for use with power domains
enabled. LPASS will be runtime resumed/suspended as a result of its child
devices runtime PM transitions.
Signed-off-by: Marek Szyprowski <m.szyprowski@samsung.com>
Acked-by: Krzysztof Kozlowski <krzk@kernel.org>
Acked-by: Sylwester Nawrocki <s.nawrocki@samsung.com>
Signed-off-by: Lee Jones <lee.jones@linaro.org>
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