[PATCH 2/2] opal: Add message notifier unregister function
From: Neelesh Gupta <hidden>
Date: 2015-02-10 17:18:04
Subsystem:
linux for powerpc (32-bit and 64-bit), the rest · Maintainers:
Madhavan Srinivasan, Linus Torvalds
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 <redacted> Reviewed-by: Vasant Hegde <redacted> --- 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 */