From: Michael Bringmann <mwb@linux.vnet.ibm.com>
To: linuxppc-dev@lists.ozlabs.org
Cc: Michael Bringmann <mwb@linux.vnet.ibm.com>,
Nathan Fontenot <nfont@linux.vnet.ibm.com>,
John Allen <jallen@linux.vnet.ibm.com>,
Tyrel Datwyler <tyreld@linux.vnet.ibm.com>,
Thomas Falcon <tlfalcon@linux.vnet.ibm.com>
Subject: [RFC v7 5/7] powerpc/mobility: Add lock/unlock device hotplug
Date: Tue, 22 May 2018 19:22:24 -0500 [thread overview]
Message-ID: <771dc291-b291-b3ac-9ddc-ce934c38f334@linux.vnet.ibm.com> (raw)
In-Reply-To: <b9c98429-f3d7-1e6d-603f-6ac01225e400@linux.vnet.ibm.com>
powerpc/mobility: Add device lock/unlock to PowerPC 'mobility' operation
to delay the operation of CPU DLPAR work queue operations by the 'readd'
activity until after any changes to the corresponding device-tree
properties have been written.
Signed-off-by: Michael Bringmann <mwb@linux.vnet.ibm.com>
---
arch/powerpc/platforms/pseries/mobility.c | 3 +++
1 file changed, 3 insertions(+)
diff --git a/arch/powerpc/platforms/pseries/mobility.c b/arch/powerpc/platforms/pseries/mobility.c
index 8a8033a..6d98f84 100644
--- a/arch/powerpc/platforms/pseries/mobility.c
+++ b/arch/powerpc/platforms/pseries/mobility.c
@@ -283,6 +283,8 @@ int pseries_devicetree_update(s32 scope)
if (!rtas_buf)
return -ENOMEM;
+ lock_device_hotplug();
+
do {
rc = mobility_rtas_call(update_nodes_token, rtas_buf, scope);
if (rc && rc != 1)
@@ -321,6 +323,7 @@ int pseries_devicetree_update(s32 scope)
} while (rc == 1);
kfree(rtas_buf);
+ unlock_device_hotplug();
return rc;
}
next prev parent reply other threads:[~2018-05-23 0:22 UTC|newest]
Thread overview: 8+ messages / expand[flat|nested] mbox.gz Atom feed top
2018-05-23 0:21 [RFC v7 0/7] powerpc/hotplug: Fix affinity assoc for LPAR migration Michael Bringmann
2018-05-23 0:22 ` [RFC v7 1/7] powerpc/drmem: Export 'dynamic-memory' loader Michael Bringmann
2018-05-23 0:22 ` [RFC v7 2/7] powerpc/cpu: Conditionally acquire/release DRC index Michael Bringmann
2018-05-23 0:22 ` [RFC v7 3/7] migration/dlpar: Add operation queuing function Michael Bringmann
2018-05-23 0:22 ` [RFC v7 4/7] powerpc/dlpar: Provide CPU readd operation Michael Bringmann
2018-05-23 0:22 ` Michael Bringmann [this message]
2018-05-23 0:22 ` [RFC v7 6/7] migration/memory: Update memory for assoc changes Michael Bringmann
2018-05-23 0:22 ` [RFC v5 7/7] migration/memory: Support 'ibm,dynamic-memory-v2' Michael Bringmann
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