kernel_optimize_test/drivers/base
Bard Liao bf672140d6 regmap: sdw: use _no_pm functions in regmap_read/write
[ Upstream commit d288a5712ef961e16d588bbdb2d846e00b5ef154 ]

sdw_update_slave_status will be invoked when a codec is attached,
and the codec driver will initialize the codec with regmap functions
while the codec device is pm_runtime suspended.

regmap routines currently rely on regular SoundWire IO functions,
which will call pm_runtime_get_sync()/put_autosuspend.

This causes a deadlock where the resume routine waits for an
initialization complete signal that while the initialization complete
can only be reached when the resume completes.

The only solution if we allow regmap functions to be used in resume
operations as well as during codec initialization is to use _no_pm
routines. The duty of making sure the bus is operational needs to be
handled above the regmap level.

Fixes: 7c22ce6e21 ('regmap: Add SoundWire bus support')
Signed-off-by: Bard Liao <yung-chuan.liao@linux.intel.com>
Acked-by: Mark Brown <broonie@kernel.org>
Link: https://lore.kernel.org/r/20210122070634.12825-6-yung-chuan.liao@linux.intel.com
Signed-off-by: Vinod Koul <vkoul@kernel.org>
Signed-off-by: Sasha Levin <sashal@kernel.org>
2021-03-04 11:38:15 +01:00
..
firmware_loader Char/Misc driver patches for 5.10-rc1 2020-10-15 10:01:51 -07:00
power PM: runtime: Drop pm_runtime_clean_up_links() 2020-11-02 18:14:07 +01:00
regmap regmap: sdw: use _no_pm functions in regmap_read/write 2021-03-04 11:38:15 +01:00
test drivers: base: default KUNIT_* fragments to KUNIT_ALL_TESTS 2020-06-01 14:24:25 -06:00
arch_topology.c Driver Core patches for 5.10-rc1 2020-10-14 16:09:32 -07:00
attribute_container.c
base.h driver core: add deferring probe reason to devices_deferred property 2020-07-30 09:03:43 +02:00
bus.c drivers core: Miscellaneous changes for sysfs_emit 2020-10-02 13:12:07 +02:00
cacheinfo.c drivers core: Use sysfs_emit for shared_cpu_map_show and shared_cpu_list_show 2020-10-02 13:24:40 +02:00
class.c drivers core: Miscellaneous changes for sysfs_emit 2020-10-02 13:12:07 +02:00
component.c
container.c
core.c driver core: Extend device_is_dependent() 2021-01-27 11:55:18 +01:00
cpu.c drivers core: Miscellaneous changes for sysfs_emit 2020-10-02 13:12:07 +02:00
dd.c drivers core: Free dma_range_map when driver probe failed 2021-01-27 11:55:18 +01:00
devcoredump.c drivers core: Miscellaneous changes for sysfs_emit 2020-10-02 13:12:07 +02:00
devres.c devres: provide devm_krealloc() 2020-09-08 13:32:06 +02:00
devtmpfs.c init: add an init_chroot helper 2020-07-31 08:17:52 +02:00
driver.c drivers: base: Convert to printk alias functions 2020-07-10 14:16:44 +02:00
firmware.c
hypervisor.c
init.c
isa.c
Kconfig drivers: base: default KUNIT_* fragments to KUNIT_ALL_TESTS 2020-06-01 14:24:25 -06:00
Makefile device property: Move fwnode_connection_find_match() under drivers/base/property.c 2020-09-08 13:32:06 +02:00
map.c
memory.c mm/memory_hotplug: prepare passing flags to add_memory() and friends 2020-10-16 11:11:18 -07:00
module.c
node.c mm: don't panic when links can't be created in sysfs 2020-10-16 11:11:18 -07:00
pinctrl.c
platform-msi.c
platform.c drivers core: Miscellaneous changes for sysfs_emit 2020-10-02 13:12:07 +02:00
property.c device property: Move fwnode_connection_find_match() under drivers/base/property.c 2020-09-08 13:32:06 +02:00
soc.c drivers core: Miscellaneous changes for sysfs_emit 2020-10-02 13:12:07 +02:00
swnode.c media: software_node: Fix refcounts in software_node_get_next_child() 2021-03-04 11:37:42 +01:00
syscore.c syscore: Use pm_pr_dbg() for syscore_{suspend,resume}() 2020-09-08 13:32:06 +02:00
topology.c drivers core: Miscellaneous changes for sysfs_emit 2020-10-02 13:12:07 +02:00
transport_class.c