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linux/drivers/base
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Yasuaki Ishimatsu a37f86305c driver core: Release device_hotplug_lock when store_mem_state returns EINVAL 
When inserting a wrong value to /sys/devices/system/memory/memoryX/state file,
following messages are shown. And device_hotplug_lock is never released.

================================================
[ BUG: lock held when returning to user space! ]
3.12.0-rc4-debug+ #3 Tainted: G        W
------------------------------------------------
bash/6442 is leaving the kernel with locks still held!
1 lock held by bash/6442:
 #0:  (device_hotplug_lock){+.+.+.}, at: [<ffffffff8146cbb5>] lock_device_hotplug_sysfs+0x15/0x50

This issue was introdued by commit fa2be40 (drivers: base: use standard
device online/offline for state change).

This patch releases device_hotplug_lcok when store_mem_state returns EINVAL.

Signed-off-by: Yasuaki Ishimatsu <isimatu.yasuaki@jp.fujitsu.com>
Reviewed-by: Toshi Kani <toshi.kani@hp.com>
CC: Seth Jennings <sjenning@linux.vnet.ibm.com>
Signed-off-by: Greg Kroah-Hartman <gregkh@linuxfoundation.org>
2013-10-16 18:42:41 -07:00
..
power ACPI and power management updates for 3.12-rc1 2013-09-03 15:59:39 -07:00
regmap Driver core patches for 3.12-rc1 2013-09-03 11:37:15 -07:00
attribute_container.c drivers: avoid format string in dev_set_name 2013-07-03 16:07:41 -07:00
base.h driver core: bus_type: add drv_groups 2013-08-12 15:33:31 -07:00
bus.c driver core: add #include <linux/sysfs.h> to core files. 2013-08-27 10:24:15 -07:00
class.c sysfs.h: remove attr_name() macro 2013-08-22 10:25:34 -07:00
core.c driver core : Fix use after free of dev->parent in device_shutdown 2013-09-26 14:46:11 -07:00
cpu.c ACPI and power management updates for 3.12-rc1 2013-09-03 15:59:39 -07:00
dd.c PM / Runtime: Idle devices asynchronously after probe|release 2013-04-11 12:42:52 -07:00
devres.c Linux 3.9-rc3 2013-03-17 19:40:50 -07:00
devtmpfs.c driver core: handle user namespaces properly with the uid/gid devtmpfs change 2013-04-11 11:43:29 -07:00
dma-buf.c dma-buf: Expose buffer size to userspace (v2) 2013-09-10 11:36:45 +05:30
dma-coherent.c drivers: dma-coherent: Fix typo in dma_mmap_from_coherent documentation 2012-10-23 14:05:32 +02:00
dma-contiguous.c drivers: dma-contiguous: clean source code and prepare for device tree 2013-08-27 09:18:29 +02:00
dma-mapping.c [media] dma-mapping: fix dma_common_get_sgtable() conditional compilation 2012-11-27 09:42:31 -02:00
driver.c driver core: add #include <linux/sysfs.h> to core files. 2013-08-27 10:24:15 -07:00
firmware_class.c firmware loader: fix pending_fw_head list corruption 2013-08-30 12:04:27 -07:00
firmware.c
hypervisor.c drivers/base: Add export.h for EXPORT_SYMBOL/THIS_MODULE as required. 2011-10-31 19:31:38 -04:00
init.c driver-core: implement 'sysdev' functionality for regular devices and buses 2011-12-14 14:29:38 -08:00
isa.c
Kconfig Merge remote-tracking branch 'dma-public/for-v3.12-cma-dma' into for-next 2013-07-15 11:13:54 +02:00
Makefile Merge remote-tracking branch 'origin/next' into kvm-ppc-next 2013-08-29 00:41:59 +02:00
map.c
memory.c driver core: Release device_hotplug_lock when store_mem_state returns EINVAL 2013-10-16 18:42:41 -07:00
module.c
node.c thp: account anon transparent huge pages into NR_ANON_PAGES 2013-09-12 15:38:03 -07:00
pinctrl.c drivers: pinctrl sleep and idle states in the core 2013-06-16 11:56:52 +02:00
platform.c driver-core: platform: convert bus code to use dev_groups 2013-08-23 14:43:44 -07:00
reservation.c reservation: cross-device reservation support, v4 2013-06-28 12:02:15 +10:00
soc.c mode_t whack-a-mole: ->is_visible() returns umode_t... 2012-05-29 23:28:42 -04:00
syscore.c PM: Reintroduce dropped call to check_wakeup_irqs 2011-07-11 10:51:49 +02:00
topology.c cpu topology: remove stale arch_provides_topology_pointers and define_siblings_show_map/list() 2013-07-29 13:12:45 -07:00
transport_class.c drivers/base: transport_class explicitly requires EXPORT_SYMBOL 2011-10-31 19:31:15 -04:00