staging: nvec: implement unregistering of notifiers

This implements the unregistering of notifiers so kernel modules
can be unloaded.

Signed-off-by: Marc Dietrich <marvin24@gmx.de>
Signed-off-by: Greg Kroah-Hartman <gregkh@linuxfoundation.org>

diff --git a/drivers/staging/nvec/nvec.c b/drivers/staging/nvec/nvec.c
index 954c9921d5b9d06c76f0b7b053f6aa94db2c0015..51a123e2b066c87dac60c32776f32a6a2d9df524 100644 (file)
--- a/drivers/staging/nvec/nvec.c
+++ b/drivers/staging/nvec/nvec.c
@@ -123,6 +123,20 @@ int nvec_register_notifier(struct nvec_chip *nvec, struct notifier_block *nb,
 }
 EXPORT_SYMBOL_GPL(nvec_register_notifier);
 
+/**
+ * nvec_unregister_notifier - Unregister a notifier with nvec
+ * @nvec: A &struct nvec_chip
+ * @nb: The notifier block to unregister
+ *
+ * Unregisters a notifier with @nvec. The notifier will be removed from the
+ * atomic notifier chain.
+ */
+int nvec_unregister_notifier(struct nvec_chip *nvec, struct notifier_block *nb)
+{
+       return atomic_notifier_chain_unregister(&nvec->notifier_list, nb);
+}
+EXPORT_SYMBOL_GPL(nvec_unregister_notifier);
+
 /**
  * nvec_status_notifier - The final notifier
  *

diff --git a/drivers/staging/nvec/nvec.h b/drivers/staging/nvec/nvec.h
index b7a14bc0ab9153319b58bad6f30f7e538d3fc775..2b1316d87470eaa9f3c84b775854bc56d10da3ab 100644 (file)
--- a/drivers/staging/nvec/nvec.h
+++ b/drivers/staging/nvec/nvec.h
@@ -197,9 +197,8 @@ extern int nvec_register_notifier(struct nvec_chip *nvec,
                                  struct notifier_block *nb,
                                  unsigned int events);
 
-extern int nvec_unregister_notifier(struct device *dev,
-                                   struct notifier_block *nb,
-                                   unsigned int events);
+extern int nvec_unregister_notifier(struct nvec_chip *dev,
+                                   struct notifier_block *nb);
 
 extern void nvec_msg_free(struct nvec_chip *nvec, struct nvec_msg *msg);