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powerpc/pseries: Improve error code on reconfiguration notifier failure 

Reconfiguration notifier call for device node may fail by several reasons,
but it always assumes kmalloc failures.

This enables reconfiguration notifier call chain to get the actual error
code rather than -ENOMEM by converting all reconfiguration notifier calls
to return encapsulate error code with notifier_from_errno().

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>
This commit is contained in:
Akinobu Mita 2011-06-21 03:35:56 +00:00 committed by Benjamin Herrenschmidt
parent 3aef19f0a1
commit de2780a3d8
4 changed files with 12 additions and 26 deletions
Show Stats Download Patch File Download Diff File Expand all files Collapse all files

8
arch/powerpc/kernel/prom.c
View File

@ -849,16 +849,14 @@ static int prom_reconfig_notifier(struct notifier_block *nb,
switch (action) {
case PSERIES_RECONFIG_ADD:
err = of_finish_dynamic_node(node);
if (err < 0) {
if (err < 0)
printk(KERN_ERR "finish_node returned %d\n", err);
err = NOTIFY_BAD;
}
break;
default:
err = NOTIFY_DONE;
err = 0;
break;
}
return err;
return notifier_from_errno(err);
}
static struct notifier_block prom_reconfig_nb = {

10
arch/powerpc/platforms/pseries/hotplug-cpu.c
View File

@ -330,21 +330,17 @@ static void pseries_remove_processor(struct device_node *np)
static int pseries_smp_notifier(struct notifier_block *nb,
unsigned long action, void *node)
{
int err = NOTIFY_OK;
int err = 0;
switch (action) {
case PSERIES_RECONFIG_ADD:
if (pseries_add_processor(node))
err = NOTIFY_BAD;
err = pseries_add_processor(node);
break;
case PSERIES_RECONFIG_REMOVE:
pseries_remove_processor(node);
break;
default:
err = NOTIFY_DONE;
break;
}
return err;
return notifier_from_errno(err);
}
static struct notifier_block pseries_smp_nb = {

16
arch/powerpc/platforms/pseries/hotplug-memory.c
View File

@ -197,27 +197,21 @@ static int pseries_drconf_memory(unsigned long *base, unsigned int action)
static int pseries_memory_notifier(struct notifier_block *nb,
unsigned long action, void *node)
{
int err = NOTIFY_OK;
int err = 0;
switch (action) {
case PSERIES_RECONFIG_ADD:
if (pseries_add_memory(node))
err = NOTIFY_BAD;
err = pseries_add_memory(node);
break;
case PSERIES_RECONFIG_REMOVE:
if (pseries_remove_memory(node))
err = NOTIFY_BAD;
err = pseries_remove_memory(node);
break;
case PSERIES_DRCONF_MEM_ADD:
case PSERIES_DRCONF_MEM_REMOVE:
if (pseries_drconf_memory(node, action))
err = NOTIFY_BAD;
break;
default:
err = NOTIFY_DONE;
err = pseries_drconf_memory(node, action);
break;
}
return err;
return notifier_from_errno(err);
}
static struct notifier_block pseries_mem_nb = {

4
arch/powerpc/platforms/pseries/reconfig.c
View File

@ -114,9 +114,7 @@ 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;
return notifier_to_errno(err);
}
static int pSeries_reconfig_add_node(const char *path, struct property *proplist)