[S390] kernel: Print an error message if kernel NSS cannot be defined

If a named saved system (NSS) cannot be defined or saved, print out an
error message with the return code of the underlying z/VM CP command.

Signed-off-by: Hendrik Brueckner <brueckner@linux.vnet.ibm.com>
Signed-off-by: Martin Schwidefsky <schwidefsky@de.ibm.com>

diff --git a/arch/s390/kernel/early.c b/arch/s390/kernel/early.c
index 734deeaa736133e3047d8c04e65b2d25f3997ad5..bf8b4ae7ff2d6450ac6fee0f7133e2fddc24b702 100644 (file)
--- a/arch/s390/kernel/early.c
+++ b/arch/s390/kernel/early.c
@@ -6,6 +6,9 @@
  *              Heiko Carstens <heiko.carstens@de.ibm.com>
  */
 
+#define KMSG_COMPONENT "setup"
+#define pr_fmt(fmt) KMSG_COMPONENT ": " fmt
+
 #include <linux/compiler.h>
 #include <linux/init.h>
 #include <linux/errno.h>
@@ -16,6 +19,7 @@
 #include <linux/module.h>
 #include <linux/pfn.h>
 #include <linux/uaccess.h>
+#include <linux/kernel.h>
 #include <asm/ebcdic.h>
 #include <asm/ipl.h>
 #include <asm/lowcore.h>
@@ -140,6 +144,8 @@ static noinline __init void create_kernel_nss(void)
        __cpcmd(defsys_cmd, NULL, 0, &response);
 
        if (response != 0) {
+               pr_err("Defining the Linux kernel NSS failed with rc=%d\n",
+                       response);
                kernel_nss_name[0] = '\0';
                return;
        }
@@ -152,8 +158,11 @@ static noinline __init void create_kernel_nss(void)
         *             max SAVESYS_CMD_SIZE
         * On error: response contains the numeric portion of cp error message.
         *           for SAVESYS it will be >= 263
+        *           for missing privilege class, it will be 1
         */
-       if (response > SAVESYS_CMD_SIZE) {
+       if (response > SAVESYS_CMD_SIZE || response == 1) {
+               pr_err("Saving the Linux kernel NSS failed with rc=%d\n",
+                       response);
                kernel_nss_name[0] = '\0';
                return;
        }