crypto: ccp - Fix DBC sample application error handling

[platform/kernel/linux-starfive.git] / tools / crypto / ccp / dbc.c

diff --git a/tools/crypto/ccp/dbc.c b/tools/crypto/ccp/dbc.c
index 37e8131..7774e98 100644 (file)
--- a/tools/crypto/ccp/dbc.c
+++ b/tools/crypto/ccp/dbc.c
@@ -8,6 +8,7 @@
  */
 
 #include <assert.h>
+#include <errno.h>
 #include <string.h>
 #include <sys/ioctl.h>
 
@@ -22,16 +23,14 @@ int get_nonce(int fd, void *nonce_out, void *signature)
        struct dbc_user_nonce tmp = {
                .auth_needed = !!signature,
        };
-       int ret;
 
        assert(nonce_out);
 
        if (signature)
                memcpy(tmp.signature, signature, sizeof(tmp.signature));
 
-       ret = ioctl(fd, DBCIOCNONCE, &tmp);
-       if (ret)
-               return ret;
+       if (ioctl(fd, DBCIOCNONCE, &tmp))
+               return errno;
        memcpy(nonce_out, tmp.nonce, sizeof(tmp.nonce));
 
        return 0;
@@ -47,7 +46,9 @@ int set_uid(int fd, __u8 *uid, __u8 *signature)
        memcpy(tmp.uid, uid, sizeof(tmp.uid));
        memcpy(tmp.signature, signature, sizeof(tmp.signature));
 
-       return ioctl(fd, DBCIOCUID, &tmp);
+       if (ioctl(fd, DBCIOCUID, &tmp))
+               return errno;
+       return 0;
 }
 
 int process_param(int fd, int msg_index, __u8 *signature, int *data)
@@ -63,9 +64,8 @@ int process_param(int fd, int msg_index, __u8 *signature, int *data)
 
        memcpy(tmp.signature, signature, sizeof(tmp.signature));
 
-       ret = ioctl(fd, DBCIOCPARAM, &tmp);
-       if (ret)
-               return ret;
+       if (ioctl(fd, DBCIOCPARAM, &tmp))
+               return errno;
 
        *data = tmp.param;
        return 0;