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Message-Id: <20220620104123.341054-6-clement.leger@bootlin.com>
Date: Mon, 20 Jun 2022 12:41:23 +0200
From: Clément Léger <clement.leger@...tlin.com>
To: Michael Ellerman <mpe@...erman.id.au>,
Benjamin Herrenschmidt <benh@...nel.crashing.org>,
Paul Mackerras <paulus@...ba.org>,
Rob Herring <robh+dt@...nel.org>,
Frank Rowand <frowand.list@...il.com>,
Nathan Lynch <nathanl@...ux.ibm.com>,
Laurent Dufour <ldufour@...ux.ibm.com>,
Daniel Henrique Barboza <danielhb413@...il.com>,
David Gibson <david@...son.dropbear.id.au>,
Andrew Morton <akpm@...ux-foundation.org>,
David Hildenbrand <david@...hat.com>,
Ohhoon Kwon <ohoono.kwon@...sung.com>,
"Aneesh Kumar K.V" <aneesh.kumar@...ux.ibm.com>,
YueHaibing <yuehaibing@...wei.com>
Cc: Clément Léger <clement.leger@...tlin.com>,
linuxppc-dev@...ts.ozlabs.org, linux-kernel@...r.kernel.org,
devicetree@...r.kernel.org,
Allan Nielsen <allan.nielsen@...rochip.com>,
Horatiu Vultur <horatiu.vultur@...rochip.com>,
Steen Hegelund <steen.hegelund@...rochip.com>,
Thomas Petazzoni <thomas.petazzoni@...tlin.com>,
Bjorn Helgaas <helgaas@...nel.org>,
Lizhi Hou <lizhi.hou@...inx.com>
Subject: [PATCH v3 5/5] powerpc/pseries: use of_property_alloc/free() and of_node_alloc()
Use of_property_alloc/free() and of_node_alloc() to create and free
device-tree nodes and properties. In order to obtain something cleaner
and allow using only of_node_put() instead of manual property deletion,
a rework of the usage of node in reconfig.c has been done.
Signed-off-by: Clément Léger <clement.leger@...tlin.com>
---
arch/powerpc/platforms/pseries/dlpar.c | 62 +--------
.../platforms/pseries/hotplug-memory.c | 21 +--
arch/powerpc/platforms/pseries/reconfig.c | 123 ++++++------------
3 files changed, 50 insertions(+), 156 deletions(-)
diff --git a/arch/powerpc/platforms/pseries/dlpar.c b/arch/powerpc/platforms/pseries/dlpar.c
index 498d6efcb5ae..c17e7b6f1dd2 100644
--- a/arch/powerpc/platforms/pseries/dlpar.c
+++ b/arch/powerpc/platforms/pseries/dlpar.c
@@ -38,75 +38,25 @@ struct cc_workarea {
__be32 prop_offset;
};
-void dlpar_free_cc_property(struct property *prop)
-{
- kfree(prop->name);
- kfree(prop->value);
- kfree(prop);
-}
-
static struct property *dlpar_parse_cc_property(struct cc_workarea *ccwa)
{
- struct property *prop;
- char *name;
- char *value;
-
- prop = kzalloc(sizeof(*prop), GFP_KERNEL);
- if (!prop)
- return NULL;
+ int length;
+ char *name, *value;
name = (char *)ccwa + be32_to_cpu(ccwa->name_offset);
- prop->name = kstrdup(name, GFP_KERNEL);
- if (!prop->name) {
- dlpar_free_cc_property(prop);
- return NULL;
- }
-
- prop->length = be32_to_cpu(ccwa->prop_length);
+ length = be32_to_cpu(ccwa->prop_length);
value = (char *)ccwa + be32_to_cpu(ccwa->prop_offset);
- prop->value = kmemdup(value, prop->length, GFP_KERNEL);
- if (!prop->value) {
- dlpar_free_cc_property(prop);
- return NULL;
- }
- return prop;
+ return of_property_alloc(name, value, length);
}
static struct device_node *dlpar_parse_cc_node(struct cc_workarea *ccwa)
{
- struct device_node *dn;
const char *name;
- dn = kzalloc(sizeof(*dn), GFP_KERNEL);
- if (!dn)
- return NULL;
-
name = (const char *)ccwa + be32_to_cpu(ccwa->name_offset);
- dn->full_name = kstrdup(name, GFP_KERNEL);
- if (!dn->full_name) {
- kfree(dn);
- return NULL;
- }
- of_node_set_flag(dn, OF_DYNAMIC);
- of_node_init(dn);
-
- return dn;
-}
-
-static void dlpar_free_one_cc_node(struct device_node *dn)
-{
- struct property *prop;
-
- while (dn->properties) {
- prop = dn->properties;
- dn->properties = prop->next;
- dlpar_free_cc_property(prop);
- }
-
- kfree(dn->full_name);
- kfree(dn);
+ return of_node_alloc(name);
}
void dlpar_free_cc_nodes(struct device_node *dn)
@@ -117,7 +67,7 @@ void dlpar_free_cc_nodes(struct device_node *dn)
if (dn->sibling)
dlpar_free_cc_nodes(dn->sibling);
- dlpar_free_one_cc_node(dn);
+ of_node_put(dn);
}
#define COMPLETE 0
diff --git a/arch/powerpc/platforms/pseries/hotplug-memory.c b/arch/powerpc/platforms/pseries/hotplug-memory.c
index 2e3a317722a8..e583814414a1 100644
--- a/arch/powerpc/platforms/pseries/hotplug-memory.c
+++ b/arch/powerpc/platforms/pseries/hotplug-memory.c
@@ -69,33 +69,16 @@ unsigned long pseries_memory_block_size(void)
return memblock_size;
}
-static void dlpar_free_property(struct property *prop)
-{
- kfree(prop->name);
- kfree(prop->value);
- kfree(prop);
-}
-
static struct property *dlpar_clone_property(struct property *prop,
u32 prop_size)
{
- struct property *new_prop;
-
- new_prop = kzalloc(sizeof(*new_prop), GFP_KERNEL);
+ struct property *new_prop = of_property_alloc(prop->name, NULL,
+ prop_size);
if (!new_prop)
return NULL;
- new_prop->name = kstrdup(prop->name, GFP_KERNEL);
- new_prop->value = kzalloc(prop_size, GFP_KERNEL);
- if (!new_prop->name || !new_prop->value) {
- dlpar_free_property(new_prop);
- return NULL;
- }
-
memcpy(new_prop->value, prop->value, prop->length);
- new_prop->length = prop_size;
- of_property_set_flag(new_prop, OF_DYNAMIC);
return new_prop;
}
diff --git a/arch/powerpc/platforms/pseries/reconfig.c b/arch/powerpc/platforms/pseries/reconfig.c
index cad7a0c93117..8704c541de3c 100644
--- a/arch/powerpc/platforms/pseries/reconfig.c
+++ b/arch/powerpc/platforms/pseries/reconfig.c
@@ -19,46 +19,29 @@
#include "of_helpers.h"
-static int pSeries_reconfig_add_node(const char *path, struct property *proplist)
+static struct device_node *pSeries_reconfig_add_node(const char *path)
{
- struct device_node *np;
- int err = -ENOMEM;
-
- np = kzalloc(sizeof(*np), GFP_KERNEL);
- if (!np)
- goto out_err;
-
- np->full_name = kstrdup(kbasename(path), GFP_KERNEL);
- if (!np->full_name)
- goto out_err;
-
- np->properties = proplist;
- of_node_set_flag(np, OF_DYNAMIC);
- of_node_init(np);
+ struct device_node *np, *parent;
- np->parent = pseries_of_derive_parent(path);
- if (IS_ERR(np->parent)) {
- err = PTR_ERR(np->parent);
- goto out_err;
+ np = of_find_node_by_path(path)
+ if (np) {
+ of_node_put(np);
+ return ERR_PTR(-EINVAL);
}
- err = of_attach_node(np);
- if (err) {
- printk(KERN_ERR "Failed to add device node %s\n", path);
- goto out_err;
- }
+ parent = pseries_of_derive_parent(path);
+ if (IS_ERR(parent))
+ return parent;
- of_node_put(np->parent);
+ np = of_node_alloc(kbasename(path));
+ if (!np) {
+ of_node_put(parent);
+ return ERR_PTR(-ENOMEM);
+ }
- return 0;
+ np->parent = parent;
-out_err:
- if (np) {
- of_node_put(np->parent);
- kfree(np->full_name);
- kfree(np);
- }
- return err;
+ return np;
}
static int pSeries_reconfig_remove_node(struct device_node *np)
@@ -80,24 +63,6 @@ static int pSeries_reconfig_remove_node(struct device_node *np)
return 0;
}
-/*
- * /proc/powerpc/ofdt - yucky binary interface for adding and removing
- * OF device nodes. Should be deprecated as soon as we get an
- * in-kernel wrapper for the RTAS ibm,configure-connector call.
- */
-
-static void release_prop_list(const struct property *prop)
-{
- struct property *next;
- for (; prop; prop = next) {
- next = prop->next;
- kfree(prop->name);
- kfree(prop->value);
- kfree(prop);
- }
-
-}
-
/**
* parse_next_property - process the next property from raw input buffer
* @buf: input buffer, must be nul-terminated
@@ -148,7 +113,7 @@ static char * parse_next_property(char *buf, char *end, char **name, int *length
/* now we're on the value */
*value = tmp;
tmp += *length;
- if (tmp > end) {
+ if (tmp >= end) {
printk(KERN_ERR "property parse failed in %s at line %d\n",
__func__, __LINE__);
return NULL;
@@ -158,6 +123,7 @@ static char * parse_next_property(char *buf, char *end, char **name, int *length
__func__, __LINE__);
return NULL;
}
+ *tmp = '\0';
tmp++;
/* and now we should be on the next name, or the end */
@@ -167,27 +133,15 @@ static char * parse_next_property(char *buf, char *end, char **name, int *length
static struct property *new_property(const char *name, const int length,
const unsigned char *value, struct property *last)
{
- struct property *new = kzalloc(sizeof(*new), GFP_KERNEL);
+ struct property *prop;
- if (!new)
+ prop = of_property_alloc(name, value, length);
+ if (!prop)
return NULL;
- if (!(new->name = kstrdup(name, GFP_KERNEL)))
- goto cleanup;
- if (!(new->value = kmalloc(length + 1, GFP_KERNEL)))
- goto cleanup;
-
- memcpy(new->value, value, length);
- *(((char *)new->value) + length) = 0;
- new->length = length;
- new->next = last;
- return new;
-
-cleanup:
- kfree(new->name);
- kfree(new->value);
- kfree(new);
- return NULL;
+ prop->next = last;
+
+ return prop;
}
static int do_add_node(char *buf, size_t bufsize)
@@ -203,13 +157,13 @@ static int do_add_node(char *buf, size_t bufsize)
buf = strchr(buf, ' ');
if (!buf)
return -EINVAL;
+
*buf = '\0';
buf++;
- if ((np = of_find_node_by_path(path))) {
- of_node_put(np);
- return -EINVAL;
- }
+ np = pSeries_reconfig_add_node(path);
+ if (IS_ERR(np))
+ return PTR_ERR(np);
/* rv = build_prop_list(tmp, bufsize - (tmp - buf), &proplist); */
while (buf < end &&
@@ -217,22 +171,29 @@ static int do_add_node(char *buf, size_t bufsize)
struct property *last = prop;
prop = new_property(name, length, value, last);
- if (!prop) {
- rv = -ENOMEM;
- prop = last;
+ if (!prop)
goto out;
- }
+
+ np->properties = prop;
}
if (!buf) {
rv = -EINVAL;
goto out;
}
- rv = pSeries_reconfig_add_node(path, prop);
+ rv = of_attach_node(np);
+ if (rv) {
+ pr_err("Failed to attach node %pOF\n", np);
+ goto out;
+ }
+ of_node_put(np->parent);
+
+ return 0;
out:
- if (rv)
- release_prop_list(prop);
+ of_node_put(np->parent);
+ of_node_put(np);
+
return rv;
}
--
2.36.1
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