Provide an unregister interface for the opal message notifiers
to be called when not needed like during driver unload/remove.
Signed-off-by: Neelesh Gupta <neele...@linux.vnet.ibm.com>
Reviewed-by: Vasant Hegde <hegdevas...@linux.vnet.ibm.com>
---
arch/powerpc/include/asm/opal.h | 2 ++
arch/powerpc/platforms/powernv/opal.c | 7 +++++++
2 files changed, 9 insertions(+)
diff --git a/arch/powerpc/include/asm/opal.h b/arch/powerpc/include/asm/opal.h
index eb95b67..70eb45f 100644
--- a/arch/powerpc/include/asm/opal.h
+++ b/arch/powerpc/include/asm/opal.h
@@ -940,6 +940,8 @@ extern int opal_notifier_unregister(struct notifier_block
*nb);
extern int opal_message_notifier_register(enum OpalMessageType msg_type,
struct notifier_block *nb);
+extern int opal_message_notifier_unregister(enum OpalMessageType msg_type,
+ struct notifier_block *nb);
extern void opal_notifier_enable(void);
extern void opal_notifier_disable(void);
extern void opal_notifier_update_evt(uint64_t evt_mask, uint64_t evt_val);
diff --git a/arch/powerpc/platforms/powernv/opal.c
b/arch/powerpc/platforms/powernv/opal.c
index 2651e22..6c108ce 100644
--- a/arch/powerpc/platforms/powernv/opal.c
+++ b/arch/powerpc/platforms/powernv/opal.c
@@ -315,6 +315,13 @@ int opal_message_notifier_register(enum OpalMessageType
msg_type,
&opal_msg_notifier_head[msg_type], nb);
}
+int opal_message_notifier_unregister(enum OpalMessageType msg_type,
+ struct notifier_block *nb)
+{
+ return atomic_notifier_chain_unregister(
+ &opal_msg_notifier_head[msg_type], nb);
+}
+
static void opal_message_do_notify(uint32_t msg_type, void *msg)
{
/* notify subscribers */
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