powerpc/pseries: Failure on removing device node
While running command "drmgr -c phb -r -s 'PHB 528'", following
backtrace jumped out because the target device node isn't marked
with OF_DETACHED by of_detach_node(), which caused by error
returned from memory hotplug related reconfig notifier when
disabling CONFIG_MEMORY_HOTREMOVE. The patch fixes it.
ERROR: Bad of_node_put() on /pci@
800000020000210/ethernet@0
CPU: 14 PID: 2252 Comm: drmgr Tainted: G W 3.16.0+ #427
Call Trace:
[
c000000012a776a0] [
c000000000013d9c] .show_stack+0x88/0x148 (unreliable)
[
c000000012a77750] [
c00000000083cd34] .dump_stack+0x7c/0x9c
[
c000000012a777d0] [
c0000000006807c4] .of_node_release+0x58/0xe0
[
c000000012a77860] [
c00000000038a7d0] .kobject_release+0x174/0x1b8
[
c000000012a77900] [
c00000000038a884] .kobject_put+0x70/0x78
[
c000000012a77980] [
c000000000681680] .of_node_put+0x28/0x34
[
c000000012a77a00] [
c000000000681ea8] .__of_get_next_child+0x64/0x70
[
c000000012a77a90] [
c000000000682138] .of_find_node_by_path+0x1b8/0x20c
[
c000000012a77b40] [
c000000000051840] .ofdt_write+0x308/0x688
[
c000000012a77c20] [
c000000000238430] .proc_reg_write+0xb8/0xd4
[
c000000012a77cd0] [
c0000000001cbeac] .vfs_write+0xec/0x1f8
[
c000000012a77d70] [
c0000000001cc3b0] .SyS_write+0x58/0xa0
[
c000000012a77e30] [
c00000000000a064] syscall_exit+0x0/0x98
Cc: stable@vger.kernel.org
Signed-off-by: Gavin Shan <gwshan@linux.vnet.ibm.com>
Signed-off-by: Benjamin Herrenschmidt <benh@kernel.crashing.org>
projects / GitHub / MotorolaMobilityLLC / kernel-slsi.git / commit