brcm47xx: do not read out cfe

Reading the CFE properties causes system hangs on some devices. With
this patch nvram read will be successful very time so cfe will no be
read out. This code is not really correct but it will work around some
problems for some people.

Related ticket: #7693

SVN-Revision: 22663

target/linux/brcm47xx/patches-2.6.34/015-MIPS-BCM47xx-nvram_getenv-fix-return-value.patch

-From c5cb2459ff124c1a928e2056bc1fe2da7b6ab6ba Mon Sep 17 00:00:00 2001
+From ff7295cc37b1e4b31aed9f071374f43aa128329b Mon Sep 17 00:00:00 2001
 From: Hauke Mehrtens <hauke@hauke-m.de>
 Date: Fri, 30 Jul 2010 17:45:20 +0200
 Subject: [PATCH 5/6] MIPS: BCM47xx: nvram_getenv fix return value.
@@ -9,8 +9,9 @@ Change nvram_getenv to do the same.
 
 Signed-off-by: Hauke Mehrtens <hauke@hauke-m.de>
 ---
- arch/mips/bcm47xx/nvram.c |    4 ++--
- 1 files changed, 2 insertions(+), 2 deletions(-)
+ arch/mips/bcm47xx/nvram.c                  |    4 ++--
+ arch/mips/include/asm/mach-bcm47xx/nvram.h |    3 +++
+ 2 files changed, 5 insertions(+), 2 deletions(-)
 
 --- a/arch/mips/bcm47xx/nvram.c
 +++ b/arch/mips/bcm47xx/nvram.c
@@ -19,7 +20,7 @@ Signed-off-by: Hauke Mehrtens <hauke@hauke-m.de>
  
  	if (!name)
 -		return 1;
-+		return -8;
++		return NVRAM_ERR_INV_PARAM;
  
  	if (!nvram_buf[0])
  		early_nvram_init();
@@ -28,6 +29,19 @@ Signed-off-by: Hauke Mehrtens <hauke@hauke-m.de>
  		}
  	}
 -	return 1;
-+	return -9;
++	return NVRAM_ERR_ENVNOTFOUND;
  }
  EXPORT_SYMBOL(nvram_getenv);
+--- a/arch/mips/include/asm/mach-bcm47xx/nvram.h
++++ b/arch/mips/include/asm/mach-bcm47xx/nvram.h
+@@ -31,6 +31,10 @@ struct nvram_header {
+ #define NVRAM_MAX_VALUE_LEN 255
+ #define NVRAM_MAX_PARAM_LEN 64
+ 
++// TODO: replace by old values. This chaueses that the system will not try to look into the cfe.
++#define NVRAM_ERR_INV_PARAM	1 // -8
++#define NVRAM_ERR_ENVNOTFOUND	1 // -9
++
+ extern int nvram_getenv(char *name, char *val, size_t val_len);
+ 
+ #endif

target/linux/brcm47xx/patches-2.6.35/015-MIPS-BCM47xx-nvram_getenv-fix-return-value.patch

-From c5cb2459ff124c1a928e2056bc1fe2da7b6ab6ba Mon Sep 17 00:00:00 2001
+From ff7295cc37b1e4b31aed9f071374f43aa128329b Mon Sep 17 00:00:00 2001
 From: Hauke Mehrtens <hauke@hauke-m.de>
 Date: Fri, 30 Jul 2010 17:45:20 +0200
 Subject: [PATCH 5/6] MIPS: BCM47xx: nvram_getenv fix return value.
@@ -9,8 +9,9 @@ Change nvram_getenv to do the same.
 
 Signed-off-by: Hauke Mehrtens <hauke@hauke-m.de>
 ---
- arch/mips/bcm47xx/nvram.c |    4 ++--
- 1 files changed, 2 insertions(+), 2 deletions(-)
+ arch/mips/bcm47xx/nvram.c                  |    4 ++--
+ arch/mips/include/asm/mach-bcm47xx/nvram.h |    3 +++
+ 2 files changed, 5 insertions(+), 2 deletions(-)
 
 --- a/arch/mips/bcm47xx/nvram.c
 +++ b/arch/mips/bcm47xx/nvram.c
@@ -19,7 +20,7 @@ Signed-off-by: Hauke Mehrtens <hauke@hauke-m.de>
  
  	if (!name)
 -		return 1;
-+		return -8;
++		return NVRAM_ERR_INV_PARAM;
  
  	if (!nvram_buf[0])
  		early_nvram_init();
@@ -28,6 +29,19 @@ Signed-off-by: Hauke Mehrtens <hauke@hauke-m.de>
  		}
  	}
 -	return 1;
-+	return -9;
++	return NVRAM_ERR_ENVNOTFOUND;
  }
  EXPORT_SYMBOL(nvram_getenv);
+--- a/arch/mips/include/asm/mach-bcm47xx/nvram.h
++++ b/arch/mips/include/asm/mach-bcm47xx/nvram.h
+@@ -31,6 +31,10 @@ struct nvram_header {
+ #define NVRAM_MAX_VALUE_LEN 255
+ #define NVRAM_MAX_PARAM_LEN 64
+ 
++// TODO: replace by old values. This chaueses that the system will not try to look into the cfe.
++#define NVRAM_ERR_INV_PARAM	1 // -8
++#define NVRAM_ERR_ENVNOTFOUND	1 // -9
++
+ extern int nvram_getenv(char *name, char *val, size_t val_len);
+ 
+ #endif