kernel.git/drivers/acpi/property.c, branch linux-5.12.y

ACPI: property: Satisfy kernel doc validator (part 2)

2021-02-12T14:34:14Z

CHECK drivers/acpi/property.c warning: Function parameter or member '__fwnode' not described in 'acpi_graph_get_remote_endpoint' warning: Excess function parameter 'fwnode' description in 'acpi_graph_get_remote_endpoint' warning: Excess function parameter 'endpoint' description in 'acpi_graph_get_remote_endpoint' Fixes: 0ef7478639c5 ("ACPI: property: Make the ACPI graph API private") Signed-off-by: Andy Shevchenko Signed-off-by: Rafael J. Wysocki

ACPI: property: Satisfy kernel doc validator (part 1)

2021-02-12T14:34:14Z

CHECK drivers/acpi/property.c warning: Function parameter or member 'data' not described in 'acpi_data_get_property_array' warning: Excess function parameter 'adev' description in 'acpi_data_get_property_array' Fixes: 3a7a2ab839ad ("ACPI / property: Extend fwnode_property_* to data-only subnodes") Signed-off-by: Andy Shevchenko Signed-off-by: Rafael J. Wysocki

ACPI: property: Make acpi_node_prop_read() static

2021-02-12T14:34:14Z

There is no users outside of property.c. No need to export acpi_node_prop_read(), hence make it static. Fixes: 3708184afc77 ("device property: Move FW type specific functionality to FW specific files") Signed-off-by: Andy Shevchenko Signed-off-by: Rafael J. Wysocki

ACPI: property: Remove dead code

2021-02-12T14:34:14Z

After the commit 3a7a2ab839ad couple of functions became a dead code. Moreover, for all these years nobody used them. Remove. Fixes: 3a7a2ab839ad ("ACPI / property: Extend fwnode_property_* to data-only subnodes") Signed-off-by: Andy Shevchenko Signed-off-by: Rafael J. Wysocki

ACPI: property: Fix fwnode string properties matching

2021-02-12T13:30:19Z

Property matching does not work for ACPI fwnodes if the value of the given property is not represented as a package in the _DSD package containing it. For example, the "compatible" property in the _DSD below Name (_DSD, Package () { ToUUID("daffd814-6eba-4d8c-8a91-bc9bbf4aa301"), Package () { Package () {"compatible", "ethernet-phy-ieee802.3-c45"} } }) will not be found by fwnode_property_match_string(), because the ACPI code handling device properties does not regard the single value as a "list" in that case. Namely, fwnode_property_match_string() invoked to match a given string property value first calls fwnode_property_read_string_array() with the last two arguments equal to NULL and 0, respectively, in order to count the items in the value of the given property, with the assumption that this value may be an array. For ACPI fwnodes, that operation is carried out by acpi_node_prop_read() which calls acpi_data_prop_read() for this purpose. However, when the return (val) pointer is NULL, that function only looks for a property whose value is a package without checking the single-value case at all. To fix that, make acpi_data_prop_read() check the single-value case if its return pointer argument is NULL and modify acpi_data_prop_read_single() handling that case to attempt to read the value of the property if the return pointer is NULL and return 1 if that succeeds. Fixes: 3708184afc77 ("device property: Move FW type specific functionality to FW specific files") Reported-by: Calvin Johnson Cc: 4.13+ # 4.13+ Signed-off-by: Rafael J. Wysocki Reviewed-by: Sakari Ailus Reviewed-by: Mika Westerberg Reviewed-by: Andy Shevchenko

driver core: Add fwnode_init()

2020-12-09T18:10:20Z

There are multiple locations in the kernel where a struct fwnode_handle is initialized. Add fwnode_init() so that we have one way of initializing a fwnode_handle. Acked-by: Rob Herring Signed-off-by: Saravana Kannan Link: https://lore.kernel.org/r/20201121020232.908850-8-saravanak@google.com Signed-off-by: Greg Kroah-Hartman

Merge tag 'for-5.9/drivers-20200803' of git://git.kernel.dk/linux-block

2020-08-05T17:51:40Z

Pull block driver updates from Jens Axboe: - NVMe: - ZNS support (Aravind, Keith, Matias, Niklas) - Misc cleanups, optimizations, fixes (Baolin, Chaitanya, David, Dongli, Max, Sagi) - null_blk zone capacity support (Aravind) - MD: - raid5/6 fixes (ChangSyun) - Warning fixes (Damien) - raid5 stripe fixes (Guoqing, Song, Yufen) - sysfs deadlock fix (Junxiao) - raid10 deadlock fix (Vitaly) - struct_size conversions (Gustavo) - Set of bcache updates/fixes (Coly) * tag 'for-5.9/drivers-20200803' of git://git.kernel.dk/linux-block: (117 commits) md/raid5: Allow degraded raid6 to do rmw md/raid5: Fix Force reconstruct-write io stuck in degraded raid5 raid5: don't duplicate code for different paths in handle_stripe raid5-cache: hold spinlock instead of mutex in r5c_journal_mode_show md: print errno in super_written md/raid5: remove the redundant setting of STRIPE_HANDLE md: register new md sysfs file 'uuid' read-only md: fix max sectors calculation for super 1.0 nvme-loop: remove extra variable in create ctrl nvme-loop: set ctrl state connecting after init nvme-multipath: do not fall back to __nvme_find_path() for non-optimized paths nvme-multipath: fix logic for non-optimized paths nvme-rdma: fix controller reset hang during traffic nvme-tcp: fix controller reset hang during traffic nvmet: introduce the passthru Kconfig option nvmet: introduce the passthru configfs interface nvmet: Add passthru enable/disable helpers nvmet: add passthru code to process commands nvme: export nvme_find_get_ns() and nvme_put_ns() nvme: introduce nvme_ctrl_get_by_path() ...

nvme-pci: add support for ACPI StorageD3Enable property

2020-07-29T05:45:19Z

This patch implements a solution for a BIOS hack used on some currently shipping Intel systems to change driver power management policy for PCIe NVMe drives. Some newer Intel platforms, like some Comet Lake systems, require that PCIe devices use D3 when doing suspend-to-idle in order to allow the platform to realize maximum power savings. This is particularly needed to support ATX power supply shutdown on desktop systems. In order to ensure this happens for root ports with storage devices, Microsoft apparently created this ACPI _DSD property as a way to influence their driver policy. To my knowledge this property has not been discussed with the NVME specification body. Though the solution is not ideal, it addresses a problem that also affects Linux since the NVMe driver's default policy of using NVMe APST during suspend-to-idle prevents the PCI root port from going to D3 and leads to higher power consumption for these platforms. The power consumption difference may be negligible on laptop systems, but many watts on desktop systems when the ATX power supply is blocked from powering down. The patch creates a new nvme_acpi_storage_d3 function to check for the StorageD3Enable property during probe and enables D3 as a quirk if set. It also provides a 'noacpi' module parameter to allow skipping the quirk if needed. Tested with: - PM961 NVMe SED Samsung 512GB - INTEL SSDPEKKF512G8 Link: https://docs.microsoft.com/en-us/windows-hardware/design/component-guidelines/power-management-for-storage-hardware-devices-intro Signed-off-by: David E. Box Reviewed-by: Rafael J. Wysocki Signed-off-by: Christoph Hellwig

ACPI: property: use cached name in acpi_fwnode_get_named_child_node()

2020-06-22T15:08:58Z

There is no need to re-evaluate the object name. Signed-off-by: Heikki Krogerus Signed-off-by: Rafael J. Wysocki

device property: Add a function to obtain a node's prefix

2019-10-11T09:26:55Z

The prefix is used for printing purpose before a node, and it also works as a separator between two nodes. Signed-off-by: Sakari Ailus Acked-by: Rob Herring (for OF) Reviewed-by: Andy Shevchenko Signed-off-by: Rafael J. Wysocki