[v2,3/5] powerpc: pseries: remove dlpar_attach_node dependency on full path

Message ID 20170821151651.25096-4-robh@kernel.org
State New
Headers show
Series
  • [v2,1/5] powerpc: Convert to using %pOF instead of full_name
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Commit Message

Rob Herring Aug. 21, 2017, 3:16 p.m.
In preparation to stop storing the full node path in full_name, remove the
dependency on full_name from dlpar_attach_node(). Callers of
dlpar_attach_node() already have the parent device_node, so just pass the
parent node into dlpar_attach_node instead of the path. This avoids doing
a lookup of the parent node by the path.

Signed-off-by: Rob Herring <robh@kernel.org>

Cc: Benjamin Herrenschmidt <benh@kernel.crashing.org>
Cc: Paul Mackerras <paulus@samba.org>
Cc: Michael Ellerman <mpe@ellerman.id.au>
Cc: linuxppc-dev@lists.ozlabs.org
---
v2:
- rebased to linux-next

 arch/powerpc/platforms/pseries/dlpar.c       | 6 ++----
 arch/powerpc/platforms/pseries/hotplug-cpu.c | 2 +-
 arch/powerpc/platforms/pseries/mobility.c    | 2 +-
 arch/powerpc/platforms/pseries/pseries.h     | 2 +-
 4 files changed, 5 insertions(+), 7 deletions(-)

-- 
2.11.0

Comments

Michael Ellerman Aug. 24, 2017, 12:37 p.m. | #1
On Mon, 2017-08-21 at 15:16:49 UTC, Rob Herring wrote:
> In preparation to stop storing the full node path in full_name, remove the

> dependency on full_name from dlpar_attach_node(). Callers of

> dlpar_attach_node() already have the parent device_node, so just pass the

> parent node into dlpar_attach_node instead of the path. This avoids doing

> a lookup of the parent node by the path.

> 

> Signed-off-by: Rob Herring <robh@kernel.org>

> Cc: Benjamin Herrenschmidt <benh@kernel.crashing.org>

> Cc: Paul Mackerras <paulus@samba.org>

> Cc: Michael Ellerman <mpe@ellerman.id.au>

> Cc: linuxppc-dev@lists.ozlabs.org


Applied to powerpc next, thanks.

https://git.kernel.org/powerpc/c/215ee763f8cb9a2912d411f96f6f67

cheers

Patch

diff --git a/arch/powerpc/platforms/pseries/dlpar.c b/arch/powerpc/platforms/pseries/dlpar.c
index 80b84c9c8509..783f36364690 100644
--- a/arch/powerpc/platforms/pseries/dlpar.c
+++ b/arch/powerpc/platforms/pseries/dlpar.c
@@ -254,13 +254,11 @@  struct device_node *dlpar_configure_connector(__be32 drc_index,
 	return first_dn;
 }
 
-int dlpar_attach_node(struct device_node *dn)
+int dlpar_attach_node(struct device_node *dn, struct device_node *parent)
 {
 	int rc;
 
-	dn->parent = pseries_of_derive_parent(dn->full_name);
-	if (IS_ERR(dn->parent))
-		return PTR_ERR(dn->parent);
+	dn->parent = parent;
 
 	rc = of_attach_node(dn);
 	if (rc) {
diff --git a/arch/powerpc/platforms/pseries/hotplug-cpu.c b/arch/powerpc/platforms/pseries/hotplug-cpu.c
index 0a93093fbcef..b357f1ae0b0a 100644
--- a/arch/powerpc/platforms/pseries/hotplug-cpu.c
+++ b/arch/powerpc/platforms/pseries/hotplug-cpu.c
@@ -463,7 +463,7 @@  static ssize_t dlpar_cpu_add(u32 drc_index)
 		return -EINVAL;
 	}
 
-	rc = dlpar_attach_node(dn);
+	rc = dlpar_attach_node(dn, parent);
 	if (rc) {
 		saved_rc = rc;
 		pr_warn("Failed to attach node %s, rc: %d, drc index: %x\n",
diff --git a/arch/powerpc/platforms/pseries/mobility.c b/arch/powerpc/platforms/pseries/mobility.c
index 2da4851eff99..210ce632d63e 100644
--- a/arch/powerpc/platforms/pseries/mobility.c
+++ b/arch/powerpc/platforms/pseries/mobility.c
@@ -229,7 +229,7 @@  static int add_dt_node(__be32 parent_phandle, __be32 drc_index)
 	if (!dn)
 		return -ENOENT;
 
-	rc = dlpar_attach_node(dn);
+	rc = dlpar_attach_node(dn, parent_dn);
 	if (rc)
 		dlpar_free_cc_nodes(dn);
 
diff --git a/arch/powerpc/platforms/pseries/pseries.h b/arch/powerpc/platforms/pseries/pseries.h
index 1361a9db534b..4470a3194311 100644
--- a/arch/powerpc/platforms/pseries/pseries.h
+++ b/arch/powerpc/platforms/pseries/pseries.h
@@ -46,7 +46,7 @@  extern void dlpar_free_cc_nodes(struct device_node *);
 extern void dlpar_free_cc_property(struct property *);
 extern struct device_node *dlpar_configure_connector(__be32,
 						struct device_node *);
-extern int dlpar_attach_node(struct device_node *);
+extern int dlpar_attach_node(struct device_node *, struct device_node *);
 extern int dlpar_detach_node(struct device_node *);
 extern int dlpar_acquire_drc(u32 drc_index);
 extern int dlpar_release_drc(u32 drc_index);