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2017-07-04Merge tag 'pm-4.13-rc1' of ↵Linus Torvalds
git://git.kernel.org/pub/scm/linux/kernel/git/rafael/linux-pm Pull power management updates from Rafael Wysocki: "The big ticket items here are the rework of suspend-to-idle in order to add proper support for power button wakeup from it on recent Dell laptops and the rework of interfaces exporting the current CPU frequency on x86. In addition to that, support for a few new pieces of hardware is added, the PCI/ACPI device wakeup infrastructure is simplified significantly and the wakeup IRQ framework is fixed to unbreak the IRQ bus locking infrastructure. Also, there are some functional improvements for intel_pstate, tools updates and small fixes and cleanups all over. Specifics: - Rework suspend-to-idle to allow it to take wakeup events signaled by the EC into account on ACPI-based platforms in order to properly support power button wakeup from suspend-to-idle on recent Dell laptops (Rafael Wysocki). That includes the core suspend-to-idle code rework, support for the Low Power S0 _DSM interface, and support for the ACPI INT0002 Virtual GPIO device from Hans de Goede (required for USB keyboard wakeup from suspend-to-idle to work on some machines). - Stop trying to export the current CPU frequency via /proc/cpuinfo on x86 as that is inaccurate and confusing (Len Brown). - Rework the way in which the current CPU frequency is exported by the kernel (over the cpufreq sysfs interface) on x86 systems with the APERF and MPERF registers by always using values read from these registers, when available, to compute the current frequency regardless of which cpufreq driver is in use (Len Brown). - Rework the PCI/ACPI device wakeup infrastructure to remove the questionable and artificial distinction between "devices that can wake up the system from sleep states" and "devices that can generate wakeup signals in the working state" from it, which allows the code to be simplified quite a bit (Rafael Wysocki). - Fix the wakeup IRQ framework by making it use SRCU instead of RCU which doesn't allow sleeping in the read-side critical sections, but which in turn is expected to be allowed by the IRQ bus locking infrastructure (Thomas Gleixner). - Modify some computations in the intel_pstate driver to avoid rounding errors resulting from them (Srinivas Pandruvada). - Reduce the overhead of the intel_pstate driver in the HWP (hardware-managed P-states) mode and when the "performance" P-state selection algorithm is in use by making it avoid registering scheduler callbacks in those cases (Len Brown). - Rework the energy_performance_preference sysfs knob in intel_pstate by changing the values that correspond to different symbolic hint names used by it (Len Brown). - Make it possible to use more than one cpuidle driver at the same time on ARM (Daniel Lezcano). - Make it possible to prevent the cpuidle menu governor from using the 0 state by disabling it via sysfs (Nicholas Piggin). - Add support for FFH (Fixed Functional Hardware) MWAIT in ACPI C1 on AMD systems (Yazen Ghannam). - Make the CPPC cpufreq driver take the lowest nonlinear performance information into account (Prashanth Prakash). - Add support for hi3660 to the cpufreq-dt driver, fix the imx6q driver and clean up the sfi, exynos5440 and intel_pstate drivers (Colin Ian King, Krzysztof Kozlowski, Octavian Purdila, Rafael Wysocki, Tao Wang). - Fix a few minor issues in the generic power domains (genpd) framework and clean it up somewhat (Krzysztof Kozlowski, Mikko Perttunen, Viresh Kumar). - Fix a couple of minor issues in the operating performance points (OPP) framework and clean it up somewhat (Viresh Kumar). - Fix a CONFIG dependency in the hibernation core and clean it up slightly (Balbir Singh, Arvind Yadav, BaoJun Luo). - Add rk3228 support to the rockchip-io adaptive voltage scaling (AVS) driver (David Wu). - Fix an incorrect bit shift operation in the RAPL power capping driver (Adam Lessnau). - Add support for the EPP field in the HWP (hardware managed P-states) control register, HWP.EPP, to the x86_energy_perf_policy tool and update msr-index.h with HWP.EPP values (Len Brown). - Fix some minor issues in the turbostat tool (Len Brown). - Add support for AMD family 0x17 CPUs to the cpupower tool and fix a minor issue in it (Sherry Hurwitz). - Assorted cleanups, mostly related to the constification of some data structures (Arvind Yadav, Joe Perches, Kees Cook, Krzysztof Kozlowski)" * tag 'pm-4.13-rc1' of git://git.kernel.org/pub/scm/linux/kernel/git/rafael/linux-pm: (69 commits) cpufreq: Update scaling_cur_freq documentation cpufreq: intel_pstate: Clean up after performance governor changes PM: hibernate: constify attribute_group structures. cpuidle: menu: allow state 0 to be disabled intel_idle: Use more common logging style PM / Domains: Fix missing default_power_down_ok comment PM / Domains: Fix unsafe iteration over modified list of domains PM / Domains: Fix unsafe iteration over modified list of domain providers PM / Domains: Fix unsafe iteration over modified list of device links PM / Domains: Handle safely genpd_syscore_switch() call on non-genpd device PM / Domains: Call driver's noirq callbacks PM / core: Drop run_wake flag from struct dev_pm_info PCI / PM: Simplify device wakeup settings code PCI / PM: Drop pme_interrupt flag from struct pci_dev ACPI / PM: Consolidate device wakeup settings code ACPI / PM: Drop run_wake from struct acpi_device_wakeup_flags PM / QoS: constify *_attribute_group. PM / AVS: rockchip-io: add io selectors and supplies for rk3228 powercap/RAPL: prevent overridding bits outside of the mask PM / sysfs: Constify attribute groups ...
2017-07-04ACPI / DPTF: constify attribute_group structuresArvind Yadav
attribute_groups are not supposed to change at runtime. All functions working with attribute_groups provided by <linux/sysfs.h> work with const attribute_group. So mark the non-const structs as const. File size before: text data bss dec hex filename 904 496 0 1400 578 drivers/acpi/dptf/dptf_power.o File size After adding 'const': text data bss dec hex filename 944 432 0 1376 560 drivers/acpi/dptf/dptf_power.o Signed-off-by: Arvind Yadav <arvind.yadav.cs@gmail.com> Signed-off-by: Rafael J. Wysocki <rafael.j.wysocki@intel.com>
2017-07-04ACPI / LPSS: constify attribute_group structuresArvind Yadav
attribute_groups are not supposed to change at runtime. All functions working with attribute_groups provided by <linux/sysfs.h> work with const attribute_group. So mark the non-const structs as const. Signed-off-by: Arvind Yadav <arvind.yadav.cs@gmail.com> Signed-off-by: Rafael J. Wysocki <rafael.j.wysocki@intel.com>
2017-07-04ACPI: BGRT: constify attribute_group structuresArvind Yadav
attribute_groups are not supposed to change at runtime. All functions working with attribute_groups provided by <linux/sysfs.h> work with const attribute_group. So mark the non-const structs as const. Signed-off-by: Arvind Yadav <arvind.yadav.cs@gmail.com> Signed-off-by: Rafael J. Wysocki <rafael.j.wysocki@intel.com>
2017-07-04ACPI / power: constify attribute_group structuresArvind Yadav
attribute_groups are not supposed to change at runtime. All functions working with attribute_groups provided by <linux/sysfs.h> work with const attribute_group. So mark the non-const structs as const. File size before: text data bss dec hex filename 4622 304 8 4934 1346 drivers/acpi/power.o File size After adding 'const': text data bss dec hex filename 4846 80 8 4934 1346 drivers/acpi/power.o Signed-off-by: Arvind Yadav <arvind.yadav.cs@gmail.com> Signed-off-by: Rafael J. Wysocki <rafael.j.wysocki@intel.com>
2017-07-04PCI: Add DT binding for Sigma Designs Tango PCIe controllerMarc Gonzalez
Binding for the Sigma Designs SMP8759 SoC. Signed-off-by: Marc Gonzalez <marc_gonzalez@sigmadesigns.com> Signed-off-by: Bjorn Helgaas <bhelgaas@google.com> Acked-by: Rob Herring <robh@kernel.org>
2017-07-04ovl: mark parent impure and restore timestamp on ovl_link_up()Amir Goldstein
Signed-off-by: Amir Goldstein <amir73il@gmail.com>
2017-07-04ovl: document copying layers restrictions with inodes indexAmir Goldstein
The inodes index feature introduces a behavior change - on mount, upper root origin file handle is verified to match the lower root dir. This implies that copied layers cannot be mounted with the inodes index feature enabled, without explicitly removing the upper dir origin xattr and the index dir. The inodes index feature is required to support: - Prevent breaking hardlinks on copy up - NFS export support (upcoming) - Overlayfs snapshots (POC) Signed-off-by: Amir Goldstein <amir73il@gmail.com> Signed-off-by: Miklos Szeredi <mszeredi@redhat.com>
2017-07-04ovl: cleanup orphan index entriesAmir Goldstein
index entry should live only as long as there are upper or lower hardlinks. Cleanup orphan index entries on mount and when dropping the last overlay inode nlink. When about to cleanup or link up to orphan index and the index inode nlink > 1, admit that something went wrong and adjust overlay nlink to index inode nlink - 1 to prevent it from dropping below zero. This could happen when adding lower hardlinks underneath a mounted overlay and then trying to unlink them. Signed-off-by: Amir Goldstein <amir73il@gmail.com> Signed-off-by: Miklos Szeredi <mszeredi@redhat.com>
2017-07-04ovl: persistent overlay inode nlink for indexed inodesAmir Goldstein
With inodes index enabled, an overlay inode nlink counts the union of upper and non-covered lower hardlinks. During the lifetime of a non-pure upper inode, the following nlink modifying operations can happen: 1. Lower hardlink copy up 2. Upper hardlink created, unlinked or renamed over 3. Lower hardlink whiteout or renamed over For the first, copy up case, the union nlink does not change, whether the operation succeeds or fails, but the upper inode nlink may change. Therefore, before copy up, we store the union nlink value relative to the lower inode nlink in the index inode xattr trusted.overlay.nlink. For the second, upper hardlink case, the union nlink should be incremented or decremented IFF the operation succeeds, aligned with nlink change of the upper inode. Therefore, before link/unlink/rename, we store the union nlink value relative to the upper inode nlink in the index inode. For the last, lower cover up case, we simplify things by preceding the whiteout or cover up with copy up. This makes sure that there is an index upper inode where the nlink xattr can be stored before the copied up upper entry is unlink. Return the overlay inode nlinks for indexed upper inodes on stat(2). Signed-off-by: Amir Goldstein <amir73il@gmail.com> Signed-off-by: Miklos Szeredi <mszeredi@redhat.com>
2017-07-04ovl: implement index dir copy upAmir Goldstein
Implement a copy up method for non-dir objects using index dir to prevent breaking lower hardlinks on copy up. This method requires that the inodes index dir feature was enabled and that all underlying fs support file handle encoding/decoding. On the first lower hardlink copy up, upper file is created in index dir, named after the hex representation of the lower origin inode file handle. On the second lower hardlink copy up, upper file is found in index dir, by the same lower handle key. On either case, the upper indexed inode is then linked to the copy up upper path. The index entry remains linked for future lower hardlink copy up and for lower to upper inode map, that is needed for exporting overlayfs to NFS. Signed-off-by: Amir Goldstein <amir73il@gmail.com> Signed-off-by: Miklos Szeredi <mszeredi@redhat.com>
2017-07-04ovl: move copy up lock outMiklos Szeredi
Move ovl_copy_up_start()/ovl_copy_up_end() out so that it's used for both tempfile and workdir copy ups. Signed-off-by: Miklos Szeredi <mszeredi@redhat.com>
2017-07-04ovl: rearrange copy upMiklos Szeredi
Split up and rearrange copy up functions to make them better readable. Signed-off-by: Miklos Szeredi <mszeredi@redhat.com>
2017-07-04ovl: add flag for upper in ovl_entryMiklos Szeredi
For rename, we need to ensure that an upper alias exists for hard links before attempting the operation. Introduce a flag in ovl_entry to track the state of the upper alias. Signed-off-by: Miklos Szeredi <mszeredi@redhat.com>
2017-07-04ovl: use struct copy_up_ctx as function argumentMiklos Szeredi
This cleans up functions with too many arguments. Signed-off-by: Miklos Szeredi <mszeredi@redhat.com>
2017-07-04ovl: base tmpfile in workdir tooMiklos Szeredi
Signed-off-by: Miklos Szeredi <mszeredi@redhat.com>
2017-07-04ovl: factor out ovl_copy_up_inode() helperAmir Goldstein
Factor out helper for copying lower inode data and metadata to temp upper inode, that is common to copy up using O_TMPFILE and workdir. Signed-off-by: Amir Goldstein <amir73il@gmail.com> Signed-off-by: Miklos Szeredi <mszeredi@redhat.com>
2017-07-04ovl: extract helper to get temp file in copy upMiklos Szeredi
Signed-off-by: Miklos Szeredi <mszeredi@redhat.com>
2017-07-04ovl: defer upper dir lock to tempfile linkAmir Goldstein
On copy up of regular file using an O_TMPFILE, lock upper dir only before linking the tempfile in place. Signed-off-by: Amir Goldstein <amir73il@gmail.com> Signed-off-by: Miklos Szeredi <mszeredi@redhat.com>
2017-07-04ovl: hash overlay non-dir inodes by copy up originMiklos Szeredi
Signed-off-by: Miklos Szeredi <mszeredi@redhat.com>
2017-07-04ovl: cleanup bad and stale index entries on mountAmir Goldstein
Bad index entries are entries whose name does not match the origin file handle stored in trusted.overlay.origin xattr. Bad index entries could be a result of a system power off in the middle of copy up. Stale index entries are entries whose origin file handle is stale. Stale index entries could be a result of copying layers or removing lower entries while the overlay is not mounted. The case of copying layers should be detected earlier by the verification of upper root dir origin and index dir origin. Both bad and stale index entries are detected and removed on mount. Signed-off-by: Amir Goldstein <amir73il@gmail.com> Signed-off-by: Miklos Szeredi <mszeredi@redhat.com>
2017-07-04ovl: lookup index entry for copy up originAmir Goldstein
When inodes index feature is enabled, lookup in indexdir for the index entry of lower real inode or copy up origin inode. The index entry name is the hex representation of the lower inode file handle. If the index dentry in negative, then either no lower aliases have been copied up yet, or aliases have been copied up in older kernels and are not indexed. If the index dentry for a copy up origin inode is positive, but points to an inode different than the upper inode, then either the upper inode has been copied up and not indexed or it was indexed, but since then index dir was cleared. Either way, that index cannot be used to indentify the overlay inode. If a positive dentry that matches the upper inode was found, then it is safe to use the copy up origin st_ino for upper hardlinks, because all indexed upper hardlinks are represented by the same overlay inode as the copy up origin. Set the INDEX type flag on an indexed upper dentry. A non-upper dentry may also have a positive index from copy up of another lower hardlink. This situation will be handled by following patches. Index lookup is going to be used to prevent breaking hardlinks on copy up. Signed-off-by: Amir Goldstein <amir73il@gmail.com> Signed-off-by: Miklos Szeredi <mszeredi@redhat.com>
2017-07-04ovl: verify index dir matches upper dirAmir Goldstein
An index dir contains persistent hardlinks to files in upper dir. Therefore, we must never mount an existing index dir with a differnt upper dir. Store the upper root dir file handle in index dir inode when index dir is created and verify the file handle before using an existing index dir on mount. Add an 'is_upper' flag to the overlay file handle encoding and set it when encoding the upper root file handle. This is not critical for index dir verification, but it is good practice towards a standard overlayfs file handle format for NFS export. Signed-off-by: Amir Goldstein <amir73il@gmail.com> Signed-off-by: Miklos Szeredi <mszeredi@redhat.com>
2017-07-04ovl: verify upper root dir matches lower root dirAmir Goldstein
When inodes index feature is enabled, verify that the file handle stored in upper root dir matches the lower root dir or fail to mount. If upper root dir has no stored file handle, encode and store the lower root dir file handle in overlay.origin xattr. Signed-off-by: Amir Goldstein <amir73il@gmail.com> Signed-off-by: Miklos Szeredi <mszeredi@redhat.com>
2017-07-04ovl: introduce the inodes index dir featureAmir Goldstein
Create the index dir on mount. The index dir will contain hardlinks to upper inodes, named after the hex representation of their origin lower inodes. The index dir is going to be used to prevent breaking lower hardlinks on copy up and to implement overlayfs NFS export. Because the feature is not fully backward compat, enabling the feature is opt-in by config/module/mount option. Signed-off-by: Amir Goldstein <amir73il@gmail.com> Signed-off-by: Miklos Szeredi <mszeredi@redhat.com>
2017-07-04ovl: generalize ovl_create_workdir()Amir Goldstein
Pass in the subdir name to create and specify if subdir is persistent or if it should be cleaned up on every mount. Move fallback to readonly mount on failure to create dir and print of error message into the helper. This function is going to be used for creating the persistent 'index' dir under workbasedir. Signed-off-by: Amir Goldstein <amir73il@gmail.com> Signed-off-by: Miklos Szeredi <mszeredi@redhat.com>
2017-07-04ovl: relax same fs constrain for ovl_check_origin()Amir Goldstein
For the case of all layers not on the same fs, try to decode the copy up origin file handle on any of the lower layers. Signed-off-by: Amir Goldstein <amir73il@gmail.com> Signed-off-by: Miklos Szeredi <mszeredi@redhat.com>
2017-07-04ovl: get exclusive ownership on upper/work dirsAmir Goldstein
Bad things can happen if several concurrent overlay mounts try to use the same upperdir/workdir path. Try to get the 'inuse' advisory lock on upperdir and workdir. Fail mount if another overlay mount instance or another user holds the 'inuse' lock on these directories. Note that this provides no protection for concurrent overlay mount that use overlapping (i.e. descendant) upper/work dirs. Signed-off-by: Amir Goldstein <amir73il@gmail.com> Signed-off-by: Miklos Szeredi <mszeredi@redhat.com>
2017-07-04vfs: introduce inode 'inuse' lockAmir Goldstein
Added an i_state flag I_INUSE and helpers to set/clear/test the bit. The 'inuse' lock is an 'advisory' inode lock, that can be used to extend exclusive create protection beyond parent->i_mutex lock among cooperating users. This is going to be used by overlayfs to get exclusive ownership on upper and work dirs among overlayfs mounts. Signed-off-by: Amir Goldstein <amir73il@gmail.com> Signed-off-by: Miklos Szeredi <mszeredi@redhat.com>
2017-07-04ovl: move cache and version to ovl_inodeMiklos Szeredi
Signed-off-by: Miklos Szeredi <mszeredi@redhat.com>
2017-07-04ovl: use ovl_inode mutex to synchronize concurrent copy upAmir Goldstein
Use the new ovl_inode mutex to synchonize concurrent copy up instead of the super block copy up workqueue. Moving the synchronization object from the overlay dentry to the overlay inode is needed for synchonizing concurrent copy up of lower hardlinks to the same upper inode. Signed-off-by: Amir Goldstein <amir73il@gmail.com> Signed-off-by: Miklos Szeredi <mszeredi@redhat.com>
2017-07-04ovl: move impure to ovl_inodeMiklos Szeredi
Signed-off-by: Miklos Szeredi <mszeredi@redhat.com>
2017-07-04ovl: move redirect to ovl_inodeMiklos Szeredi
Signed-off-by: Miklos Szeredi <mszeredi@redhat.com>
2017-07-04ovl: move __upperdentry to ovl_inodeMiklos Szeredi
Signed-off-by: Miklos Szeredi <mszeredi@redhat.com>
2017-07-04ovl: compare inodesMiklos Szeredi
When checking for consistency in directory operations (unlink, rename, etc.) match inodes not dentries. Signed-off-by: Miklos Szeredi <mszeredi@redhat.com>
2017-07-04ovl: use i_private only as a keyMiklos Szeredi
Signed-off-by: Miklos Szeredi <mszeredi@redhat.com>
2017-07-04ovl: simplify getting inodeMiklos Szeredi
Signed-off-by: Miklos Szeredi <mszeredi@redhat.com>
2017-07-04ovl: allocate an ovl_inode structAmir Goldstein
We need some more space to store overlay inode data in memory, so allocate overlay inodes from a slab of struct ovl_inode. Signed-off-by: Amir Goldstein <amir73il@gmail.com> Signed-off-by: Miklos Szeredi <mszeredi@redhat.com>
2017-07-04ovl: fix nlink leak in ovl_rename()Amir Goldstein
This patch fixes an overlay inode nlink leak in the case where ovl_rename() renames over a non-dir. This is not so critical, because overlay inode doesn't rely on nlink dropping to zero for inode deletion. Signed-off-by: Amir Goldstein <amir73il@gmail.com> Signed-off-by: Miklos Szeredi <mszeredi@redhat.com>
2017-07-04cpufreq: intel_pstate: constify attribute_group structuresArvind Yadav
attribute_groups are not supposed to change at runtime. All functions working with attribute_groups provided by <linux/sysfs.h> work with const attribute_group. So mark the non-const structs as const. File size before: text data bss dec hex filename 15197 2552 40 17789 457d drivers/cpufreq/intel_pstate.o File size After adding 'const': text data bss dec hex filename 15261 2488 40 17789 457d drivers/cpufreq/intel_pstate.o Signed-off-by: Arvind Yadav <arvind.yadav.cs@gmail.com> Acked-by: Viresh Kumar <viresh.kumar@linaro.org> Signed-off-by: Rafael J. Wysocki <rafael.j.wysocki@intel.com>
2017-07-04cpufreq: cpufreq_stats: constify attribute_group structuresArvind Yadav
attribute_groups are not supposed to change at runtime. All functions working with attribute_groups provided by <linux/sysfs.h> work with const attribute_group. So mark the non-const structs as const. File size before: text data bss dec hex filename 1655 256 4 1915 77b drivers/cpufreq/cpufreq_stats.o File size After adding 'const': text data bss dec hex filename 1695 192 4 1891 763 drivers/cpufreq/cpufreq_stats.o Signed-off-by: Arvind Yadav <arvind.yadav.cs@gmail.com> Acked-by: Viresh Kumar <viresh.kumar@linaro.org> Signed-off-by: Rafael J. Wysocki <rafael.j.wysocki@intel.com>
2017-07-04PM / sleep: constify attribute_group structuresArvind Yadav
attribute_groups are not supposed to change at runtime. All functions working with attribute_groups provided by <linux/sysfs.h> work with const attribute_group. So mark the non-const structs as const. File size before: text data bss dec hex filename 3802 624 32 4458 116a kernel/power/main.o File size After adding 'const': text data bss dec hex filename 3866 560 32 4458 116a kernel/power/main.o Signed-off-by: Arvind Yadav <arvind.yadav.cs@gmail.com> Acked-by: Pavel Machek <pavel@ucw.cz> Signed-off-by: Rafael J. Wysocki <rafael.j.wysocki@intel.com>
2017-07-04PM / Domains: provide pm_genpd_poweroff_noirq() stubArnd Bergmann
When CONFIG_PM_SLEEP is disabled, we don't have a pm_genpd_poweroff_noirq function definition: drivers/base/power/domain.c: In function 'pm_genpd_init': drivers/base/power/domain.c:1549:37: error: 'pm_genpd_poweroff_noirq' undeclared (first use in this function); did you mean 'genpd_power_off_unused'? This adds another NULL definition for it, just like we already have for the other _noirq handlers. Fixes: 10da65423fdb (PM / Domains: Call driver's noirq callbacks) Signed-off-by: Arnd Bergmann <arnd@arndb.de> Signed-off-by: Rafael J. Wysocki <rafael.j.wysocki@intel.com>
2017-07-04Revert "PM / Domains: Handle safely genpd_syscore_switch() call on non-genpd ↵Rafael J. Wysocki
device" Revert commit 8b55e55ee443 (PM / Domains: Handle safely genpd_syscore_switch() call on non-genpd device) which was misguided (the change made by it was not necessary) and it introduced a call to a function that may sleep into an atomic context code path. Reported-by: Geert Uytterhoeven <geert@linux-m68k.org> Signed-off-by: Rafael J. Wysocki <rafael.j.wysocki@intel.com>
2017-07-04ACPI / scan: Indicate to platform when hot remove returns busyLee, Chun-Yi
In hotplug logic, it always indicates non-specific failure to platform through _OST when handing ACPI hot-remove event failed. Then platform terminates the hot-remove process but it can not identify the reason. Base on current hot-remove code, there have two situations that it returns busy: - OSPM try to offline an individual device, but the device offline function returns "busy". - When the ejection event is applied to an "not offlined yet" container. OSPM sends a kobject change event to userspace and returns "busy". Both of them will returns -EBUSY to ACPI device hotplug function. Then, the hotplug function indicates non-specific failure to platform just like for any other error, e.g. -ENODEV or -EIO. The benefit to the platform for identifying the OS "busy" state is that it can use a different approach to handle the "busy" instead of simply terminating the hot-remove operation for an unknown reason. For example, the platform can wait for a while and then re-trigger hot-remove. Signed-off-by: "Lee, Chun-Yi" <jlee@suse.com> Reviewed-by: Andy Shevchenko <andy.shevchenko@gmail.com> [ rjw: Changelog massage ] Signed-off-by: Rafael J. Wysocki <rafael.j.wysocki@intel.com>
2017-07-04ACPI / bus: handle ACPI hotplug schedule errors completelyLee, Chun-Yi
Kernel should decrements the reference count of ACPI device when the scheduling of ACPI hotplug work failed, and evaluates _OST to notify BIOS the failure. Reviewed-by: Andy Shevchenko <andy.shevchenko@gmail.com> Signed-off-by: "Lee, Chun-Yi" <jlee@suse.com> Signed-off-by: Rafael J. Wysocki <rafael.j.wysocki@intel.com>
2017-07-04ACPI / osi: Make local function acpi_osi_dmi_linux() staticColin Ian King
The function acpi_osi_dmi_linux() is local and does not need to be in global scope, so make it static. Cleans up sparse warning: "symbol 'acpi_osi_dmi_linux' was not declared. Should it be static?" Signed-off-by: Colin Ian King <colin.king@canonical.com> Signed-off-by: Rafael J. Wysocki <rafael.j.wysocki@intel.com>
2017-07-04ACPI: SPCR: Workaround for APM X-Gene 8250 UART 32-alignment errataLoc Ho
APM X-Gene verion 1 and 2 have an 8250 UART with its register aligned to 32-bit. In addition, the latest released BIOS encodes the access field as 8-bit access instead 32-bit access. This causes no console with ACPI boot as the console will not match X-Gene UART port due to the lack of mmio32 option. Signed-off-by: Loc Ho <lho@apm.com> Acked-by: Greg Kroah-Hartman <gregkh@linuxfoundation.org> Signed-off-by: Rafael J. Wysocki <rafael.j.wysocki@intel.com>
2017-07-04ACPI: SPCR: Use access width to determine mmio usageLoc Ho
The current SPCR code does not check the access width of the MMIO, and uses a default of 8bit register accesses. This prevents devices that only do 16 or 32bit register accesses from working. By simply checking this field and setting the MMIO string appropriately, this issue can be corrected. To prevent any legacy issues, the code will default to 8bit accesses if the value is anything but 16 or 32. Signed-off-by: Jon Mason <jon.mason@broadcom.com> Signed-off-by: Loc Ho <lho@apm.com> Acked-by: Greg Kroah-Hartman <gregkh@linuxfoundation.org> Signed-off-by: Rafael J. Wysocki <rafael.j.wysocki@intel.com>
2017-07-04Merge tag 'spi-v4.13' of ↵Linus Torvalds
git://git.kernel.org/pub/scm/linux/kernel/git/broonie/spi Pull spi updates from Mark Brown: "There's only one big change in this release but it's a very big change: Geert Uytterhoeven has implemented support for SPI slave mode. This feature has been on the cards since the subsystem was originally merged back in the mists of time so it's great that Geert stepped up and finally implemented it. - SPI slave support, together with wholesale renaming of SPI controllers from master to controller which went surprisingly smoothly. This is already used with Renesas SoCs and support is in the works for i.MX too. - New drivers for Meson SPICC and ST STM32" * tag 'spi-v4.13' of git://git.kernel.org/pub/scm/linux/kernel/git/broonie/spi: (57 commits) spi: loopback-test: Fix kfree() NULL pointer error. spi: loopback-test: fix spelling mistake: "reruning" -> "rerunning" spi: sirf: fix spelling mistake: "registerred" -> "registered" spi: stm32: fix potential dereference null return value spi: stm32: enhance DMA error management spi: stm32: add runtime PM support spi: stm32: use normal conditional statements instead of ternary operator spi: stm32: replace st, spi-midi with st, spi-midi-ns to fit bindings spi: stm32: fix example with st, spi-midi-ns property spi: stm32: fix compatible to fit with new bindings spi: stm32: use SoC specific compatible spi: rockchip: Disable Runtime PM when chip select is asserted spi: rockchip: Set GPIO_SS flag to enable Slave Select with GPIO CS spi: atmel: fix corrupted data issue on SAM9 family SoCs spi: stm32: fix error check on mbr being -ve spi: add driver for STM32 SPI controller spi: Document the STM32 SPI bindings spi/bcm63xx: Fix checkpatch warnings spi: imx: Check for allocation failure earlier spi: mediatek: add spi support for mt2712 IC ...
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