MIPS: BCM47xx: Fix nvram_getenv return value.

Nvram_getenv should behave like cfe_getenv. cfe_getenv returns 0 on
success and -9 if the value was not found. If the input was wrong -8
will be returned by cfe_getenv.  Change nvram_getenv to do the same.

Signed-off-by: Hauke Mehrtens <hauke@hauke-m.de>
Cc: Waldemar Brodkorb <wbx@openadk.org>
Cc: linux-mips@linux-mips.org
Patchwork: https://patchwork.linux-mips.org/patch/1520/
Signed-off-by: Ralf Baechle <ralf@linux-mips.org>

2 files changed, 5 insertions, 2 deletions

diff --git a/arch/mips/bcm47xx/nvram.c b/arch/mips/bcm47xx/nvram.c
index 06e03b222f6d..e5b6615731e5 100644
--- a/arch/mips/bcm47xx/nvram.c
+++ b/arch/mips/bcm47xx/nvram.c
@@ -69,7 +69,7 @@ int nvram_getenv(char *name, char *val, size_t val_len)
         char *var, *value, *end, *eq;
 
         if (!name)
-                return 1;
+                return NVRAM_ERR_INV_PARAM;
 
         if (!nvram_buf[0])
                 early_nvram_init();
@@ -89,6 +89,6 @@ int nvram_getenv(char *name, char *val, size_t val_len)
                         return 0;
                 }
         }
-        return 1;
+        return NVRAM_ERR_ENVNOTFOUND;
 }
 EXPORT_SYMBOL(nvram_getenv);
diff --git a/arch/mips/include/asm/mach-bcm47xx/nvram.h b/arch/mips/include/asm/mach-bcm47xx/nvram.h
index 0d8cc146f7a4..c58ebd8bc155 100644
--- a/arch/mips/include/asm/mach-bcm47xx/nvram.h
+++ b/arch/mips/include/asm/mach-bcm47xx/nvram.h
@@ -31,6 +31,9 @@ struct nvram_header {
 #define NVRAM_MAX_VALUE_LEN 255
 #define NVRAM_MAX_PARAM_LEN 64
 
+#define NVRAM_ERR_INV_PARAM     -8
+#define NVRAM_ERR_ENVNOTFOUND   -9
+
 extern int nvram_getenv(char *name, char *val, size_t val_len);
 
 #endif