crypto: ccp - Check for CCP before registering crypto algs

[deliverable/linux.git] / include / linux / ccp.h

diff --git a/include/linux/ccp.h b/include/linux/ccp.h
index ebcc9d1462198d990a9a473f0fecd435045f7b53..7f437036baa4bec9efa4fd1f8b619f9849889218 100644 (file)
--- a/include/linux/ccp.h
+++ b/include/linux/ccp.h
@@ -26,6 +26,13 @@ struct ccp_cmd;
 #if defined(CONFIG_CRYPTO_DEV_CCP_DD) || \
        defined(CONFIG_CRYPTO_DEV_CCP_DD_MODULE)
 
+/**
+ * ccp_present - check if a CCP device is present
+ *
+ * Returns zero if a CCP device is present, -ENODEV otherwise.
+ */
+int ccp_present(void);
+
 /**
  * ccp_enqueue_cmd - queue an operation for processing by the CCP
  *
@@ -53,6 +60,11 @@ int ccp_enqueue_cmd(struct ccp_cmd *cmd);
 
 #else /* CONFIG_CRYPTO_DEV_CCP_DD is not enabled */
 
+static inline int ccp_present(void)
+{
+       return -ENODEV;
+}
+
 static inline int ccp_enqueue_cmd(struct ccp_cmd *cmd)
 {
        return -ENODEV;