From: Neelesh Gupta Date: Wed, 11 Feb 2015 06:27:23 +0000 (+0530) Subject: powerpc/powernv: Add OPAL message notifier unregister function X-Git-Tag: firefly_0821_release~176^2~1959^2~70^2 X-Git-Url: http://demsky.eecs.uci.edu/git/?a=commitdiff_plain;h=b921e90260cec1e04988bb3763491de885b67b51;p=firefly-linux-kernel-4.4.55.git powerpc/powernv: Add OPAL message notifier unregister function 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 Reviewed-by: Vasant Hegde Signed-off-by: Benjamin Herrenschmidt --- diff --git a/arch/powerpc/include/asm/opal.h b/arch/powerpc/include/asm/opal.h index 9ee0a30a02ce..4ea21ea6a999 100644 --- a/arch/powerpc/include/asm/opal.h +++ b/arch/powerpc/include/asm/opal.h @@ -948,6 +948,8 @@ 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 b0021ac3e0a8..8b3834a095f7 100644 --- a/arch/powerpc/platforms/powernv/opal.c +++ b/arch/powerpc/platforms/powernv/opal.c @@ -318,6 +318,13 @@ 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 */