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authorAkinobu Mita <akinobu.mita@gmail.com>2011-06-21 03:35:55 +0000
committerBenjamin Herrenschmidt <benh@kernel.crashing.org>2011-06-29 17:48:22 +1000
commit3aef19f0a10d1c274a15191766b627fe550d456e (patch)
treec3731b65f9263626a03200eb2fce8db50095bb67 /arch
parente48f7eb27f0e38e1a461fa4e43025d18100d250b (diff)
downloadlinaro-lsk-3aef19f0a10d1c274a15191766b627fe550d456e.tar.gz
powerpc/pseries: Introduce pSeries_reconfig_notify()
This introduces pSeries_reconfig_notify() as a just wrapper of blocking_notifier_call_chain() for pSeries_reconfig_chain. This is a preparation to improvement of error code on reconfiguration notifier failure. Signed-off-by: Akinobu Mita <akinobu.mita@gmail.com> Cc: Benjamin Herrenschmidt <benh@kernel.crashing.org> Cc: Paul Mackerras <paulus@samba.org> Cc: linuxppc-dev@lists.ozlabs.org Signed-off-by: Benjamin Herrenschmidt <benh@kernel.crashing.org>
Diffstat (limited to 'arch')
-rw-r--r--arch/powerpc/include/asm/pSeries_reconfig.h2
-rw-r--r--arch/powerpc/platforms/pseries/dlpar.c10
-rw-r--r--arch/powerpc/platforms/pseries/reconfig.c30
3 files changed, 23 insertions, 19 deletions
diff --git a/arch/powerpc/include/asm/pSeries_reconfig.h b/arch/powerpc/include/asm/pSeries_reconfig.h
index 89d2f99c1bf..23cd6cc30bc 100644
--- a/arch/powerpc/include/asm/pSeries_reconfig.h
+++ b/arch/powerpc/include/asm/pSeries_reconfig.h
@@ -17,7 +17,7 @@
#ifdef CONFIG_PPC_PSERIES
extern int pSeries_reconfig_notifier_register(struct notifier_block *);
extern void pSeries_reconfig_notifier_unregister(struct notifier_block *);
-extern struct blocking_notifier_head pSeries_reconfig_chain;
+extern int pSeries_reconfig_notify(unsigned long action, void *p);
/* Not the best place to put this, will be fixed when we move some
* of the rtas suspend-me stuff to pseries */
extern void pSeries_coalesce_init(void);
diff --git a/arch/powerpc/platforms/pseries/dlpar.c b/arch/powerpc/platforms/pseries/dlpar.c
index 57ceb92b228..e9be25bc571 100644
--- a/arch/powerpc/platforms/pseries/dlpar.c
+++ b/arch/powerpc/platforms/pseries/dlpar.c
@@ -262,12 +262,11 @@ int dlpar_attach_node(struct device_node *dn)
if (!dn->parent)
return -ENOMEM;
- rc = blocking_notifier_call_chain(&pSeries_reconfig_chain,
- PSERIES_RECONFIG_ADD, dn);
- if (rc == NOTIFY_BAD) {
+ rc = pSeries_reconfig_notify(PSERIES_RECONFIG_ADD, dn);
+ if (rc) {
printk(KERN_ERR "Failed to add device node %s\n",
dn->full_name);
- return -ENOMEM; /* For now, safe to assume kmalloc failure */
+ return rc;
}
of_attach_node(dn);
@@ -297,8 +296,7 @@ int dlpar_detach_node(struct device_node *dn)
remove_proc_entry(dn->pde->name, parent->pde);
#endif
- blocking_notifier_call_chain(&pSeries_reconfig_chain,
- PSERIES_RECONFIG_REMOVE, dn);
+ pSeries_reconfig_notify(PSERIES_RECONFIG_REMOVE, dn);
of_detach_node(dn);
of_node_put(dn); /* Must decrement the refcount */
diff --git a/arch/powerpc/platforms/pseries/reconfig.c b/arch/powerpc/platforms/pseries/reconfig.c
index 1de2cbb9230..286b6af3d55 100644
--- a/arch/powerpc/platforms/pseries/reconfig.c
+++ b/arch/powerpc/platforms/pseries/reconfig.c
@@ -97,7 +97,7 @@ static struct device_node *derive_parent(const char *path)
return parent;
}
-BLOCKING_NOTIFIER_HEAD(pSeries_reconfig_chain);
+static BLOCKING_NOTIFIER_HEAD(pSeries_reconfig_chain);
int pSeries_reconfig_notifier_register(struct notifier_block *nb)
{
@@ -109,6 +109,16 @@ void pSeries_reconfig_notifier_unregister(struct notifier_block *nb)
blocking_notifier_chain_unregister(&pSeries_reconfig_chain, nb);
}
+int pSeries_reconfig_notify(unsigned long action, void *p)
+{
+ int err = blocking_notifier_call_chain(&pSeries_reconfig_chain,
+ action, p);
+
+ if (err == NOTIFY_BAD)
+ return -ENOMEM; /* For now, safe to assume kmalloc failure */
+ return 0;
+}
+
static int pSeries_reconfig_add_node(const char *path, struct property *proplist)
{
struct device_node *np;
@@ -132,11 +142,9 @@ static int pSeries_reconfig_add_node(const char *path, struct property *proplist
goto out_err;
}
- err = blocking_notifier_call_chain(&pSeries_reconfig_chain,
- PSERIES_RECONFIG_ADD, np);
- if (err == NOTIFY_BAD) {
+ err = pSeries_reconfig_notify(PSERIES_RECONFIG_ADD, np);
+ if (err) {
printk(KERN_ERR "Failed to add device node %s\n", path);
- err = -ENOMEM; /* For now, safe to assume kmalloc failure */
goto out_err;
}
@@ -173,8 +181,7 @@ static int pSeries_reconfig_remove_node(struct device_node *np)
remove_node_proc_entries(np);
- blocking_notifier_call_chain(&pSeries_reconfig_chain,
- PSERIES_RECONFIG_REMOVE, np);
+ pSeries_reconfig_notify(PSERIES_RECONFIG_REMOVE, np);
of_detach_node(np);
of_node_put(parent);
@@ -472,11 +479,10 @@ static int do_update_property(char *buf, size_t bufsize)
else
action = PSERIES_DRCONF_MEM_REMOVE;
- rc = blocking_notifier_call_chain(&pSeries_reconfig_chain,
- action, value);
- if (rc == NOTIFY_BAD) {
- rc = prom_update_property(np, oldprop, newprop);
- return -ENOMEM;
+ rc = pSeries_reconfig_notify(action, value);
+ if (rc) {
+ prom_update_property(np, oldprop, newprop);
+ return rc;
}
}