1 files changed, 30 insertions, 3 deletions

diff --git a/drivers/mtd/devices/phram.c b/drivers/mtd/devices/phram.c
index 9d2bf1741fb2..3d91ace1ee4c 100644
--- a/drivers/mtd/devices/phram.c
+++ b/drivers/mtd/devices/phram.c
@@ -39,7 +39,8 @@ static int phram_erase(struct mtd_info *mtd, struct erase_info *instr)
 
         memset(start + instr->addr, 0xff, instr->len);
 
-        /* This'll catch a few races. Free the thing before returning :)
+        /*
+         * This'll catch a few races. Free the thing before returning :)
          * I don't feel at all ashamed. This kind of thing is possible anyway
          * with flash, but unlikely.
          */
@@ -204,7 +205,17 @@ static inline void kill_final_newline(char *str)
         return 1;               \
 } while (0)
 
-static int phram_setup(const char *val, struct kernel_param *kp)
+/*
+ * This shall contain the module parameter if any. It is of the form:
+ * - phram=<device>,<address>,<size> for module case
+ * - phram.phram=<device>,<address>,<size> for built-in case
+ * We leave 64 bytes for the device name, 12 for the address and 12 for the
+ * size.
+ * Example: phram.phram=rootfs,0xa0000000,512Mi
+ */
+static __initdata char phram_paramline[64+12+12];
+
+static int phram_setup(const char *val)
 {
         char buf[64+12+12], *str = buf;
         char *token[3];
@@ -253,12 +264,28 @@ static int phram_setup(const char *val, struct kernel_param *kp)
         return ret;
 }
 
-module_param_call(phram, phram_setup, NULL, NULL, 000);
+static int __init phram_param_call(const char *val, struct kernel_param *kp)
+{
+        /*
+         * This function is always called before 'init_phram()', whether
+         * built-in or module.
+         */
+        if (strlen(val) >= sizeof(phram_paramline))
+                return -ENOSPC;
+        strcpy(phram_paramline, val);
+
+        return 0;
+}
+
+module_param_call(phram, phram_param_call, NULL, NULL, 000);
 MODULE_PARM_DESC(phram, "Memory region to map. \"phram=<name>,<start>,<length>\"");
 
 
 static int __init init_phram(void)
 {
+        if (phram_paramline[0])
+                return phram_setup(phram_paramline);
+
         return 0;
 }