brcm47xx: fix destroying of 128MB modded ASUS WL-500GP

[openwrt.git] / package / nvram / files / nvram.init

diff --git a/package/nvram/files/nvram.init b/package/nvram/files/nvram.init
index 9eae17f..e6ef861 100755 (executable)
--- a/package/nvram/files/nvram.init
+++ b/package/nvram/files/nvram.init
@@ -52,7 +52,13 @@ fixup_linksys() {
                        }
                ;;
                "1071") #0x042f
-                       nvram_set sdram_init "$(printf 0x%04x $(( $(/usr/sbin/nvram get sdram_init) | 0x0009 )))"
+                       # do sanity check first! max 0x0011 = 128mb
+                       SDRAM_INIT=$(printf %d $(/usr/sbin/nvram get sdram_init))
+                       [ "$SDRAM_INIT" -lt "9" -o "$SDRAM_INIT" -gt "17" ] && {
+                               # set this to default: 0x09 only if value is invaild like 16MB on Asus WL-500GP
+                               echo "sdram_init is invaild: $(printf 0x%04x $SDRAM_INIT), force to default!"
+                               $(/usr/sbin/nvram_set sdram_init "0x0009")
+                       }
                        [ "$COMMIT" = 1 ] && {
                                nvram_set sdram_ncdl 0x0
                        }