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authorTyrel Datwyler <tyreld@linux.ibm.com>2019-11-10 23:21:32 -0600
committerMichael Ellerman <mpe@ellerman.id.au>2019-11-13 16:57:57 +1100
commit52e2b0f16574afd082cff0f0e8567b2d9f68c033 (patch)
tree4f66a75e648e9909b82a8f4bf6a119c149bc9a9f /drivers/pci/hotplug
parent9723c25f99aff0451cfe6392e1b9fdd99d0bf9f0 (diff)
PCI: rpaphp: Don't rely on firmware feature to imply drc-info support
In the event that the partition is migrated to a platform with older firmware that doesn't support the ibm,drc-info property the device tree is modified to remove the ibm,drc-info property and replace it with the older style ibm,drc-* properties for types, names, indexes, and power-domains. One of the requirements of the drc-info firmware feature is that the client is able to handle both the new property, and old style properties at runtime. Therefore we can't rely on the firmware feature alone to dictate which property is currently present in the device tree. Fix this short coming by checking explicitly for the ibm,drc-info property, and falling back to the older ibm,drc-* properties if it doesn't exist. Signed-off-by: Tyrel Datwyler <tyreld@linux.ibm.com> Acked-by: Bjorn Helgaas <bhelgaas@google.com> Signed-off-by: Michael Ellerman <mpe@ellerman.id.au> Link: https://lore.kernel.org/r/1573449697-5448-6-git-send-email-tyreld@linux.ibm.com
Diffstat (limited to 'drivers/pci/hotplug')
-rw-r--r--drivers/pci/hotplug/rpaphp_core.c2
1 files changed, 1 insertions, 1 deletions
diff --git a/drivers/pci/hotplug/rpaphp_core.c b/drivers/pci/hotplug/rpaphp_core.c
index e3502644a45c..e18e9a0e959c 100644
--- a/drivers/pci/hotplug/rpaphp_core.c
+++ b/drivers/pci/hotplug/rpaphp_core.c
@@ -275,7 +275,7 @@ int rpaphp_check_drc_props(struct device_node *dn, char *drc_name,
return -EINVAL;
}
- if (firmware_has_feature(FW_FEATURE_DRC_INFO))
+ if (of_find_property(dn->parent, "ibm,drc-info", NULL))
return rpaphp_check_drc_props_v2(dn, drc_name, drc_type,
*my_index);
else