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alistair23-linux/drivers/platform/x86
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Vadim Pasternak 160da20b25 platform/x86: mlx-platform: Fix parent device in i2c-mux-reg device registration 
Fix the issue found while running kernel with the option
CONFIG_DEBUG_TEST_DRIVER_REMOVE.
Driver 'mlx-platform' registers 'i2c_mlxcpld' device and then registers
few underlying 'i2c-mux-reg' devices:
	priv->pdev_i2c = platform_device_register_simple("i2c_mlxcpld", nr,
							 NULL, 0);
	...
	for (i = 0; i < ARRAY_SIZE(mlxplat_mux_data); i++) {
		priv->pdev_mux[i] = platform_device_register_resndata(
						&mlxplat_dev->dev,
						"i2c-mux-reg", i, NULL,
						0, &mlxplat_mux_data[i],
						sizeof(mlxplat_mux_data[i]));

But actual parent of "i2c-mux-reg" device is priv->pdev_i2c->dev and
not mlxplat_dev->dev.
Patch fixes parent device parameter in a call to
platform_device_register_resndata() for "i2c-mux-reg".

It solves the race during initialization flow while 'i2c_mlxcpld.1' is
removing after probe, while 'i2c-mux-reg.0' is still in probing flow:
'i2c_mlxcpld.1'	flow:	probe -> remove -> probe.
'i2c-mux-reg.0'	flow:		  probe -> ...

[   12:621096] Registering platform device 'i2c_mlxcpld.1'. Parent at platform
[   12:621117] device: 'i2c_mlxcpld.1': device_add
[   12:621155] bus: 'platform': add device i2c_mlxcpld.1
[   12:621384] Registering platform device 'i2c-mux-reg.0'. Parent at mlxplat
[   12:621395] device: 'i2c-mux-reg.0': device_add
[   12:621425] bus: 'platform': add device i2c-mux-reg.0
[   12:621806] Registering platform device 'i2c-mux-reg.1'. Parent at mlxplat
[   12:621828] device: 'i2c-mux-reg.1': device_add
[   12:621892] bus: 'platform': add device i2c-mux-reg.1
[   12:621906] bus: 'platform': add driver i2c_mlxcpld
[   12:621996] bus: 'platform': driver_probe_device: matched device i2c_mlxcpld.1 with driver i2c_mlxcpld
[   12:622003] bus: 'platform': really_probe: probing driver i2c_mlxcpld with device i2c_mlxcpld.1
[   12:622100] i2c_mlxcpld i2c_mlxcpld.1: no default pinctrl state
[   12:622293] device: 'i2c-1': device_add
[   12:627280] bus: 'i2c': add device i2c-1
[   12:627692] device: 'i2c-1': device_add
[   12.629639] bus: 'platform': add driver i2c-mux-reg
[   12.629718] bus: 'platform': driver_probe_device: matched device i2c-mux-reg.0 with driver i2c-mux-reg
[   12.629723] bus: 'platform': really_probe: probing driver i2c-mux-reg with device i2c-mux-reg.0
[   12.629818] i2c-mux-reg i2c-mux-reg.0: no default pinctrl state
[   12.629981] platform i2c-mux-reg.0: Driver i2c-mux-reg requests probe deferral
[   12.629986] platform i2c-mux-reg.0: Added to deferred list
[   12.629992] bus: 'platform': driver_probe_device: matched device i2c-mux-reg.1 with driver i2c-mux-reg
[   12.629997] bus: 'platform': really_probe: probing driver i2c-mux-reg with device i2c-mux-reg.1
[   12.630091] i2c-mux-reg i2c-mux-reg.1: no default pinctrl state
[   12.630247] platform i2c-mux-reg.1: Driver i2c-mux-reg requests probe deferral
[   12.630252] platform i2c-mux-reg.1: Added to deferred list
[   12.640892] devices_kset: Moving i2c-mux-reg.0 to end of list
[   12.640900] platform i2c-mux-reg.0: Retrying from deferred list
[   12.640911] bus: 'platform': driver_probe_device: matched device i2c-mux-reg.0 with driver i2c-mux-reg
[   12.640919] bus: 'platform': really_probe: probing driver i2c-mux-reg with device i2c-mux-reg.0
[   12.640999] i2c-mux-reg i2c-mux-reg.0: no default pinctrl state
[   12.641177] platform i2c-mux-reg.0: Driver i2c-mux-reg requests probe deferral
[   12.641187] platform i2c-mux-reg.0: Added to deferred list
[   12.641198] devices_kset: Moving i2c-mux-reg.1 to end of list
[   12.641219] platform i2c-mux-reg.1: Retrying from deferred list
[   12.641237] bus: 'platform': driver_probe_device: matched device i2c-mux-reg.1 with driver i2c-mux-reg
[   12.641247] bus: 'platform': really_probe: probing driver i2c-mux-reg with device i2c-mux-reg.1
[   12.641331] i2c-mux-reg i2c-mux-reg.1: no default pinctrl state
[   12.641465] platform i2c-mux-reg.1: Driver i2c-mux-reg requests probe deferral
[   12.641469] platform i2c-mux-reg.1: Added to deferred list
[   12.646427] device: 'i2c-1': device_add
[   12.646647] bus: 'i2c': add device i2c-1
[   12.647104] device: 'i2c-1': device_add
[   12.669231] devices_kset: Moving i2c-mux-reg.0 to end of list
[   12.669240] platform i2c-mux-reg.0: Retrying from deferred list
[   12.669258] bus: 'platform': driver_probe_device: matched device i2c-mux-reg.0 with driver i2c-mux-reg
[   12.669263] bus: 'platform': really_probe: probing driver i2c-mux-reg with device i2c-mux-reg.0
[   12.669343] i2c-mux-reg i2c-mux-reg.0: no default pinctrl state
[   12.669585] device: 'i2c-2': device_add
[   12.669795] bus: 'i2c': add device i2c-2
[   12.670201] device: 'i2c-2': device_add
[   12.671427] i2c i2c-1: Added multiplexed i2c bus 2
[   12.671514] device: 'i2c-3': device_add
[   12.671724] bus: 'i2c': add device i2c-3
[   12.672136] device: 'i2c-3': device_add
[   12.673378] i2c i2c-1: Added multiplexed i2c bus 3
[   12.673472] device: 'i2c-4': device_add
[   12.673676] bus: 'i2c': add device i2c-4
[   12.674060] device: 'i2c-4': device_add
[   12.675861] i2c i2c-1: Added multiplexed i2c bus 4
[   12.675941] device: 'i2c-5': device_add
[   12.676150] bus: 'i2c': add device i2c-5
[   12.676550] device: 'i2c-5': device_add
[   12.678103] i2c i2c-1: Added multiplexed i2c bus 5
[   12.678193] device: 'i2c-6': device_add
[   12.678395] bus: 'i2c': add device i2c-6
[   12.678774] device: 'i2c-6': device_add
[   12.679969] i2c i2c-1: Added multiplexed i2c bus 6
[   12.680065] device: 'i2c-7': device_add
[   12.680275] bus: 'i2c': add device i2c-7
[   12.680913] device: 'i2c-7': device_add
[   12.682506] i2c i2c-1: Added multiplexed i2c bus 7
[   12.682600] device: 'i2c-8': device_add
[   12.682808] bus: 'i2c': add device i2c-8
[   12.683189] device: 'i2c-8': device_add
[   12.683907] device: 'i2c-1': device_unregister
[   12.683945] device: 'i2c-1': device_unregister
[   12.684387] device: 'i2c-1': device_create_release
[   12.684536] bus: 'i2c': remove device i2c-1
[   12.686019] i2c i2c-8: Failed to create compatibility class link
[   12.686086] ------------[ cut here ]------------
[   12.686087] can't create symlink to mux device
[   12.686224] Workqueue: events deferred_probe_work_func
[   12.686135] WARNING: CPU: 7 PID: 436 at drivers/i2c/i2c-mux.c:416 i2c_mux_add_adapter+0x729/0x7d0 [i2c_mux]
[   12.686232] RIP: 0010:i2c_mux_add_adapter+0x729/0x7d0 [i2c_mux]
[   0x190/0x190 [i2c_mux]
[   12.686300]  ? i2c_mux_alloc+0xac/0x110 [i2c_mux]
[   12.686306]  ? i2c_mux_reg_set+0x200/0x200 [i2c_mux_reg]
[   12.686313]  i2c_mux_reg_probe+0x22c/0x731 [i2c_mux_reg]
[   12.686322]  ? i2c_mux_reg_deselect+0x60/0x60 [i2c_mux_reg]
[   12.686346]  platform_drv_probe+0xa8/0x110
[   12.686351]  really_probe+0x185/0x720
[   12.686358]  driver_probe_device+0xdf/0x1f0
...
[   12.686522] i2c i2c-1: Added multiplexed i2c bus 8
[   12.686621] device: 'i2c-9': device_add
[   12.686626] kobject_add_internal failed for i2c-9 (error: -2 parent: i2c-1)
[   12.694729] i2c-core: adapter 'i2c-1-mux (chan_id 8)': can't register device (-2)
[   12.705726] i2c i2c-1: failed to add mux-adapter 8 as bus 9 (error=-2)
[   12.714494] device: 'i2c-8': device_unregister
[   12.714537] device: 'i2c-8': device_unregister

Fixes: 6613d18e90 ("platform/x86: mlx-platform: Move module from arch/x86")
Signed-off-by: Vadim Pasternak <vadimp@mellanox.com>
Signed-off-by: Andy Shevchenko <andriy.shevchenko@linux.intel.com>
 		2019-06-12 11:49:20 +03:00
..
Kconfig treewide: Add SPDX license identifier - Makefile/Kconfig 2019-05-21 10:50:46 +02:00
Makefile platform/x86: Add support for Basin Cove power button 2019-05-09 00:33:03 +03:00
acer-wireless.c platform/x86: Add Acer Wireless Radio Control driver 2017-11-27 13:39:11 +02:00
acer-wmi.c treewide: Replace GPLv2 boilerplate/reference with SPDX - rule 156 2019-05-30 11:26:35 -07:00
acerhdf.c treewide: Replace GPLv2 boilerplate/reference with SPDX - rule 156 2019-05-30 11:26:35 -07:00
alienware-wmi.c treewide: Replace GPLv2 boilerplate/reference with SPDX - rule 157 2019-05-30 11:26:37 -07:00
amilo-rfkill.c treewide: Replace GPLv2 boilerplate/reference with SPDX - rule 152 2019-05-30 11:26:32 -07:00
apple-gmux.c platform/x86: apple-gmux: fix gmux_get_client_id()'s return type 2018-04-24 19:55:33 +03:00
asus-laptop.c treewide: Replace GPLv2 boilerplate/reference with SPDX - rule 156 2019-05-30 11:26:35 -07:00
asus-nb-wmi.c platform/x86: asus-wmi: Only Tell EC the OS will handle display hotkeys from asus_nb_wmi 2019-06-12 11:49:20 +03:00
asus-wireless.c platform/x86: asus-wireless: Fix uninitialized symbol usage 2018-07-02 16:48:22 +03:00
asus-wmi.c platform/x86: asus-wmi: Only Tell EC the OS will handle display hotkeys from asus_nb_wmi 2019-06-12 11:49:20 +03:00
asus-wmi.h platform/x86: asus-wmi: Only Tell EC the OS will handle display hotkeys from asus_nb_wmi 2019-06-12 11:49:20 +03:00
classmate-laptop.c treewide: Replace GPLv2 boilerplate/reference with SPDX - rule 1 2019-05-21 11:28:39 +02:00
compal-laptop.c treewide: Replace GPLv2 boilerplate/reference with SPDX - rule 1 2019-05-21 11:28:39 +02:00
dcdbas.c treewide: Replace GPLv2 boilerplate/reference with SPDX - rule 287 2019-06-05 17:36:37 +02:00
dcdbas.h treewide: Replace GPLv2 boilerplate/reference with SPDX - rule 287 2019-06-05 17:36:37 +02:00
dell-laptop.c platform/x86: dell-laptop: fix rfkill functionality 2019-04-16 13:18:23 -07:00
dell-rbtn.c treewide: Replace GPLv2 boilerplate/reference with SPDX - rule 157 2019-05-30 11:26:37 -07:00
dell-rbtn.h treewide: Replace GPLv2 boilerplate/reference with SPDX - rule 157 2019-05-30 11:26:37 -07:00
dell-smbios-base.c platform/x86: dell-smbios-base: Support systems without tokens 2018-06-26 15:01:52 -07:00
dell-smbios-smm.c firmware: dcdbas: Move dcdbas to drivers/platform/x86 2018-09-27 12:18:15 +03:00
dell-smbios-wmi.c platform/x86: dell-smbios-wmi: use MODULE_DEVICE_TABLE() instead of MODULE_ALIAS() 2019-03-07 08:46:29 -08:00
dell-smbios.h platform/x86: dell-smbios: Link all dell-smbios-* modules together 2018-03-09 09:35:42 -08:00
dell-smo8800.c treewide: Replace GPLv2 boilerplate/reference with SPDX - rule 157 2019-05-30 11:26:37 -07:00
dell-wmi-aio.c treewide: Replace GPLv2 boilerplate/reference with SPDX - rule 156 2019-05-30 11:26:35 -07:00
dell-wmi-descriptor.c treewide: Replace GPLv2 boilerplate/reference with SPDX - rule 174 2019-05-30 11:26:41 -07:00
dell-wmi-descriptor.h platform/x86: dell-smbios-wmi: Disable userspace interface if missing hotfix 2017-11-20 12:38:43 -08:00
dell-wmi-led.c platform/x86: dell-wmi-led: Adjust instance of wmi_evaluate_method calls to 0 2017-06-28 09:01:36 -07:00
dell-wmi.c treewide: Replace GPLv2 boilerplate/reference with SPDX - rule 156 2019-05-30 11:26:35 -07:00
dell_rbu.c treewide: Replace GPLv2 boilerplate/reference with SPDX - rule 287 2019-06-05 17:36:37 +02:00
eeepc-laptop.c treewide: Replace GPLv2 boilerplate/reference with SPDX - rule 157 2019-05-30 11:26:37 -07:00
eeepc-wmi.c treewide: Replace GPLv2 boilerplate/reference with SPDX - rule 156 2019-05-30 11:26:35 -07:00
fujitsu-laptop.c treewide: Replace GPLv2 boilerplate/reference with SPDX - rule 1 2019-05-21 11:28:39 +02:00
fujitsu-tablet.c treewide: Replace GPLv2 boilerplate/reference with SPDX - rule 414 2019-06-05 17:37:14 +02:00
gpd-pocket-fan.c platform/x86: GPD pocket fan: fix spelling mistake: "Mill-celcius" -> "millicelsius" 2018-02-15 12:21:48 +02:00
hdaps.c treewide: Replace GPLv2 boilerplate/reference with SPDX - rule 271 2019-06-05 17:30:30 +02:00
hp-wireless.c treewide: Replace GPLv2 boilerplate/reference with SPDX - rule 1 2019-05-21 11:28:39 +02:00
hp-wmi.c treewide: Replace GPLv2 boilerplate/reference with SPDX - rule 156 2019-05-30 11:26:35 -07:00
hp_accel.c treewide: Replace GPLv2 boilerplate/reference with SPDX - rule 156 2019-05-30 11:26:35 -07:00
huawei-wmi.c platform/x86: huawei-wmi: use MODULE_DEVICE_TABLE() instead of MODULE_ALIAS() 2019-03-07 08:46:29 -08:00
i2c-multi-instantiate.c ACPI / scan: Create platform device for BSG2150 ACPI nodes 2019-02-05 19:38:20 +02:00
ibm_rtl.c treewide: Replace GPLv2 boilerplate/reference with SPDX - rule 156 2019-05-30 11:26:35 -07:00
ideapad-laptop.c treewide: Replace GPLv2 boilerplate/reference with SPDX - rule 1 2019-05-21 11:28:39 +02:00
intel-hid.c platform/x86: intel-hid: Missing power button release on some Dell models 2019-01-26 11:07:34 -08:00
intel-rst.c platform/x86: intel-rst: Convert to use SPDX identifier 2018-09-27 12:18:19 +03:00
intel-smartconnect.c platform/x86: intel-smartconnect: Convert to use SPDX identifier 2018-09-27 12:18:19 +03:00
intel-vbtn.c platform/x86: intel-vbtn: Report switch events when event wakes device 2019-06-12 11:49:20 +03:00
intel-wmi-thunderbolt.c platform/x86: intel-wmi-thunderbolt: use MODULE_DEVICE_TABLE() instead of MODULE_ALIAS() 2019-03-07 08:46:29 -08:00
intel_atomisp2_pm.c platform/x86: Fix config space access for intel_atomisp2_pm 2018-12-03 21:40:03 +02:00
intel_bxtwc_tmu.c platform/x86: intel_bxtwc_tmu: Convert to use SPDX identifier 2018-09-27 12:18:16 +03:00
intel_cht_int33fe.c platform/x86: intel_cht_int33fe: Remove old style mux connections 2019-02-14 10:52:25 +01:00
intel_chtdc_ti_pwrbtn.c platform/x86: intel_chtdc_ti_pwrbtn: Add SPDX identifier 2018-09-27 12:18:16 +03:00
intel_int0002_vgpio.c platform/x86: intel_int0002_vgpio: Only implement irq_set_wake on Bay Trail 2019-02-05 20:28:54 +02:00
intel_ips.c platform/x86: intel_ips: Convert to use DEFINE_SHOW_ATTRIBUTE macro 2018-12-03 21:40:03 +02:00
intel_ips.h platform/x86: intel-ips: Convert to use SPDX identifier 2018-09-27 12:18:16 +03:00
intel_menlow.c platform/x86: intel_menlow: Convert to use SPDX identifier 2018-09-27 12:18:17 +03:00
intel_mid_powerbtn.c platform-drivers-x86 for v4.20-1 2018-11-01 08:42:21 -07:00
intel_mid_thermal.c platform/x86: intel_mid_thermal: Convert to use SPDX identifier 2018-09-27 12:18:17 +03:00
intel_mrfld_pwrbtn.c platform/x86: Add support for Basin Cove power button 2019-05-09 00:33:03 +03:00
intel_oaktrail.c platform/x86: intel_oaktrail: Convert to use SPDX identifier 2018-09-27 12:18:18 +03:00
intel_pmc_core.c platform/x86: intel_pmc_core: Allow to dump debug registers on S0ix failure 2019-05-06 17:54:42 +03:00
intel_pmc_core.h platform/x86: intel_pmc_core: Allow to dump debug registers on S0ix failure 2019-05-06 17:54:42 +03:00
intel_pmc_ipc.c platform/x86: intel_pmc_ipc: Don't map non-used optional resources 2019-05-06 17:54:04 +03:00
intel_punit_ipc.c platform/x86: intel_punit_ipc: Revert "Fix resource ioremap warning" 2019-05-06 17:54:13 +03:00
intel_scu_ipc.c platform/x86: intel_scu_ipc: Convert to use SPDX identifier 2018-09-27 12:18:19 +03:00
intel_scu_ipcutil.c platform/x86: intel_scu_ipc: Convert to use SPDX identifier 2018-09-27 12:18:19 +03:00
intel_telemetry_core.c platform/x86: intel_telemetry: Convert to use SPDX identifier 2018-09-27 12:18:20 +03:00
intel_telemetry_debugfs.c platform/x86: intel_telemetry: convert to DEFINE_SHOW_ATTRIBUTE 2018-12-10 11:31:00 +02:00
intel_telemetry_pltdrv.c platform-drivers-x86 for v4.20-1 2018-11-01 08:42:21 -07:00
intel_turbo_max_3.c platform/x86: intel_turbo_max_3: Convert to use SPDX identifier 2018-09-27 12:18:20 +03:00
lg-laptop.c platform/x86: Add LG Gram laptop special features driver 2018-10-19 19:21:57 +03:00
mlx-platform.c platform/x86: mlx-platform: Fix parent device in i2c-mux-reg device registration 2019-06-12 11:49:20 +03:00
msi-laptop.c treewide: Replace GPLv2 boilerplate/reference with SPDX - rule 1 2019-05-21 11:28:39 +02:00
msi-wmi.c treewide: Replace GPLv2 boilerplate/reference with SPDX - rule 156 2019-05-30 11:26:35 -07:00
mxm-wmi.c treewide: Replace GPLv2 boilerplate/reference with SPDX - rule 156 2019-05-30 11:26:35 -07:00
panasonic-laptop.c treewide: Replace GPLv2 boilerplate/reference with SPDX - rule 392 2019-06-05 17:37:11 +02:00
pcengines-apuv2.c x86: apuv2: remove unused variable 2019-03-08 14:11:30 +01:00
peaq-wmi.c platform/x86: peaq-wmi: Remove unnecessary checks from peaq_wmi_exit 2017-11-03 13:32:09 +02:00
pmc_atom.c treewide: Replace GPLv2 boilerplate/reference with SPDX - rule 288 2019-06-05 17:36:37 +02:00
samsung-laptop.c platform/x86: Simplify getting .drvdata 2018-04-23 08:52:59 -07:00
samsung-q10.c dmi: Mark all struct dmi_system_id instances const 2017-09-14 11:59:30 +02:00
sony-laptop.c treewide: Replace GPLv2 boilerplate/reference with SPDX - rule 61 2019-05-24 17:36:45 +02:00
surface3-wmi.c treewide: Replace GPLv2 boilerplate/reference with SPDX - rule 441 2019-06-05 17:37:17 +02:00
surface3_button.c treewide: Replace GPLv2 boilerplate/reference with SPDX - rule 441 2019-06-05 17:37:17 +02:00
surfacepro3_button.c treewide: Replace GPLv2 boilerplate/reference with SPDX - rule 441 2019-06-05 17:37:17 +02:00
tc1100-wmi.c treewide: Replace GPLv2 boilerplate/reference with SPDX - rule 156 2019-05-30 11:26:35 -07:00
thinkpad_acpi.c treewide: Replace GPLv2 boilerplate/reference with SPDX - rule 1 2019-05-21 11:28:39 +02:00
topstar-laptop.c platform/x86: topstar-laptop: replace licence text with SPDX tag 2018-02-23 18:43:42 +02:00
toshiba-wmi.c treewide: Replace GPLv2 boilerplate/reference with SPDX - rule 157 2019-05-30 11:26:37 -07:00
toshiba_acpi.c treewide: Replace GPLv2 boilerplate/reference with SPDX - rule 7 2019-05-21 11:28:40 +02:00
toshiba_bluetooth.c platform/x86: toshiba_bluetooth: Decouple an error checking status code 2016-09-23 16:21:06 -07:00
toshiba_haps.c treewide: Replace GPLv2 boilerplate/reference with SPDX - rule 157 2019-05-30 11:26:37 -07:00
touchscreen_dmi.c treewide: Replace GPLv2 boilerplate/reference with SPDX - rule 152 2019-05-30 11:26:32 -07:00
wmi-bmof.c treewide: Replace GPLv2 boilerplate/reference with SPDX - rule 174 2019-05-30 11:26:41 -07:00
wmi.c treewide: Replace GPLv2 boilerplate/reference with SPDX - rule 156 2019-05-30 11:26:35 -07:00
xo1-rfkill.c treewide: Replace GPLv2 boilerplate/reference with SPDX - rule 152 2019-05-30 11:26:32 -07:00
xo15-ebook.c treewide: Replace GPLv2 boilerplate/reference with SPDX - rule 152 2019-05-30 11:26:32 -07:00