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Heikki Krogerus 7781203416 device property: fwnode->secondary may contain ERR_PTR(-ENODEV) 
This fixes BUG triggered when fwnode->secondary is not NULL,
but has ERR_PTR(-ENODEV) instead.

BUG: unable to handle kernel paging request at ffffffffffffffed
IP: [<ffffffff81677b86>] __fwnode_property_read_string+0x26/0x160
PGD 200e067 PUD 2010067 PMD 0
Oops: 0000 [#1] SMP KASAN
Modules linked in: dwc3_pci(+) dwc3
CPU: 0 PID: 1138 Comm: modprobe Not tainted 4.5.0-rc5+ #61
task: ffff88015aaf5b00 ti: ffff88007b958000 task.ti: ffff88007b958000
RIP: 0010:[<ffffffff81677b86>]  [<ffffffff81677b86>] __fwnode_property_read_string+0x26/0x160
RSP: 0018:ffff88007b95eff8  EFLAGS: 00010246
RAX: fffffbfffffffffd RBX: ffffffffffffffed RCX: ffff88015999cd37
RDX: dffffc0000000000 RSI: ffffffff81e11bc0 RDI: ffffffffffffffed
RBP: ffff88007b95f020 R08: 0000000000000000 R09: 0000000000000000
R10: ffff88007b90f7cf R11: 0000000000000000 R12: ffff88007b95f0a0
R13: 00000000fffffffa R14: ffffffff81e11bc0 R15: ffff880159ea37a0
FS:  00007ff35f46c700(0000) GS:ffff88015b800000(0000) knlGS:0000000000000000
CS:  0010 DS: 0000 ES: 0000 CR0: 000000008005003b
CR2: ffffffffffffffed CR3: 000000007b8be000 CR4: 00000000001006f0
Stack:
 ffff88015999cd20 ffffffff81e11bc0 ffff88007b95f0a0 ffff88007b383dd8
 ffff880159ea37a0 ffff88007b95f048 ffffffff81677d03 ffff88007b952460
 ffffffff81e11bc0 ffff88007b95f0a0 ffff88007b95f070 ffffffff81677d40
Call Trace:
 [<ffffffff81677d03>] fwnode_property_read_string+0x43/0x50
 [<ffffffff81677d40>] device_property_read_string+0x30/0x40
...

Fixes: 362c0b3024 (device property: Fallback to secondary fwnode if primary misses the property)
Signed-off-by: Heikki Krogerus <heikki.krogerus@linux.intel.com>
Signed-off-by: Rafael J. Wysocki <rafael.j.wysocki@intel.com>
 		2016-03-09 01:07:43 +01:00
..
power Merge branches 'pm-core' and 'pm-domains' 2016-02-06 00:34:01 +01:00
regmap regmap: mmio: Revert to v4.4 endianness handling 2016-02-05 11:22:04 +00:00
Kconfig
…
Makefile
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attribute_container.c
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base.h PM / sleep: prohibit devices probing during suspend/hibernation 2015-11-30 14:47:22 +01:00
bus.c
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cacheinfo.c cpu/cacheinfo: Fix teardown path 2015-09-17 06:06:54 -07:00
class.c class_find_device: fix reference to argument "match" 2015-09-29 15:23:14 +02:00
component.c component: remove device from master match list on failed add 2016-02-11 09:42:09 +00:00
container.c
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core.c driver core: Do not overwrite secondary fwnode with NULL if it is set 2015-12-07 02:29:23 +01:00
cpu.c drivers/base/cpu.c: use __cpu_*_mask directly 2016-01-20 17:09:18 -08:00
dd.c driver core: Avoid NULL pointer dereferences in device_is_bound() 2016-01-12 01:51:44 +01:00
devcoredump.c
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devres.c devm: make allocations numa aware by default 2015-10-09 17:00:33 -04:00
devtmpfs.c wrappers for ->i_mutex access 2016-01-22 18:04:28 -05:00
dma-coherent.c
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dma-contiguous.c driver core update for 4.4-rc1 2015-11-04 21:50:37 -08:00
dma-mapping.c dma-mapping: remove <asm-generic/dma-coherent.h> 2016-01-20 17:09:18 -08:00
driver.c
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firmware.c
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firmware_class.c firmware: actually return NULL on failed request_firmware_nowait() 2016-01-07 13:45:34 -07:00
hypervisor.c
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init.c
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isa.c
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map.c
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memory.c mm: skip memory block registration for ZONE_DEVICE 2016-01-15 17:56:32 -08:00
module.c
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node.c Revert "mm: Check if section present during memory block (un)registering" 2015-10-13 10:57:25 -07:00
pinctrl.c drivers/pinctrl: Add the concept of an "init" state 2015-10-27 11:24:23 +01:00
platform-msi.c base: Export platform_msi_domain_[alloc,free]_irqs 2016-01-26 16:33:25 +01:00
platform.c base/platform: Fix platform drivers with no probe callback 2016-01-26 08:47:25 -08:00
property.c device property: fwnode->secondary may contain ERR_PTR(-ENODEV) 2016-03-09 01:07:43 +01:00
soc.c base: soc: siplify ida usage 2015-10-04 19:42:22 +01:00
syscore.c
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topology.c
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transport_class.c
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