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| author | Bharata B Rao <bharata@linux.vnet.ibm.com> | 2015-09-07 12:22:40 +0200 |
|---|---|---|
| committer | Michael Ellerman <mpe@ellerman.id.au> | 2015-09-08 06:07:58 +0200 |
| commit | daebaabb5cfbe4a6f09ca0e0f8b7673efc704960 (patch) | |
| tree | bc2b36fc66ccdce6240fa6ae0fcf53b7aa40b44b /arch/powerpc | |
| parent | cxl: abort cxl_pci_enable_device_hook() if PCI channel is offline (diff) | |
| download | linux-daebaabb5cfbe4a6f09ca0e0f8b7673efc704960.tar.xz linux-daebaabb5cfbe4a6f09ca0e0f8b7673efc704960.zip | |
powerpc/pseries: Release DRC when configure_connector fails
Commit f32393c943e2 ("powerpc/pseries: Correct cpu affinity for
dlpar added cpus") moved dlpar_acquire_drc() call to before
dlpar_configure_connector() call in dlpar_cpu_probe(), but missed
to release the DRC if dlpar_configure_connector() failed.
During CPU hotplug, if configure-connector fails for any reason,
then this will result in subsequent CPU hotplug attempts to fail.
Release the acquired DRC if dlpar_configure_connector() call fails
so that the DRC is left in right isolation and allocation state
for the subsequent hotplug operation to succeed.
Fixes: f32393c943e2 ("powerpc/pseries: Correct cpu affinity for dlpar added cpus")
Cc: stable@vger.kernel.org # 4.1+
Signed-off-by: Bharata B Rao <bharata@linux.vnet.ibm.com>
Reviewed-by: Nathan Fontenot <nfont@linux.vnet.ibm.com>
Signed-off-by: Michael Ellerman <mpe@ellerman.id.au>
Diffstat (limited to 'arch/powerpc')
| -rw-r--r-- | arch/powerpc/platforms/pseries/dlpar.c | 4 |
1 files changed, 3 insertions, 1 deletions
diff --git a/arch/powerpc/platforms/pseries/dlpar.c b/arch/powerpc/platforms/pseries/dlpar.c index 47d9cebe7159..db17827eb746 100644 --- a/arch/powerpc/platforms/pseries/dlpar.c +++ b/arch/powerpc/platforms/pseries/dlpar.c @@ -422,8 +422,10 @@ static ssize_t dlpar_cpu_probe(const char *buf, size_t count) dn = dlpar_configure_connector(cpu_to_be32(drc_index), parent); of_node_put(parent); - if (!dn) + if (!dn) { + dlpar_release_drc(drc_index); return -EINVAL; + } rc = dlpar_attach_node(dn); if (rc) { |