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linux/drivers/base
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Andy Shevchenko 99aed92270 device property: Don't clear secondary pointer for shared primary firmware node 
It appears that firmware nodes can be shared between devices. In such case
when a (child) device is about to be deleted, its firmware node may be shared
and ACPI_COMPANION_SET(..., NULL) call for it breaks the secondary link
of the shared primary firmware node.

In order to prevent that, check, if the device has a parent and parent's
firmware node is shared with its child, and avoid crashing the link.

Fixes: c15e1bdda4 ("device property: Fix the secondary firmware node handling in set_primary_fwnode()")
Reported-by: Ferry Toth <fntoth@gmail.com>
Signed-off-by: Andy Shevchenko <andriy.shevchenko@linux.intel.com>
Reviewed-by: Heikki Krogerus <heikki.krogerus@linux.intel.com>
Tested-by: Ferry Toth <fntoth@gmail.com>
Cc: 5.9+ <stable@vger.kernel.org> # 5.9+
Signed-off-by: Rafael J. Wysocki <rafael.j.wysocki@intel.com>
2020-10-27 19:20:03 +01:00
..
firmware_loader Char/Misc driver patches for 5.10-rc1 2020-10-15 10:01:51 -07:00
power More power management updates for 5.10-rc1 2020-10-23 16:27:03 -07:00
regmap Merge remote-tracking branch 'regmap/for-5.10' into regmap-next 2020-10-05 18:53:24 +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 scsi: drivers: base: Support atomic version of attribute_container_device_trigger 2020-01-15 22:55:36 -05:00
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 component: Silence bind error on -EPROBE_DEFER 2020-04-28 17:54:15 +02:00
container.c
core.c device property: Don't clear secondary pointer for shared primary firmware node 2020-10-27 19:20:03 +01:00
cpu.c drivers core: Miscellaneous changes for sysfs_emit 2020-10-02 13:12:07 +02:00
dd.c dma-mapping updates for 5.10 2020-10-15 14:43:29 -07:00
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 base: fix order of OF initialization 2018-07-07 17:54:29 +02:00
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-msi: Fix typos in comment 2020-05-18 10:28:30 +01:00
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 software node: Use software_node_unregister() when unregistering group of nodes 2020-07-10 14:35:37 +02:00
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 scsi: drivers: base: Propagate errors through the transport component 2020-01-15 22:55:37 -05:00