[POWERPC] Prevent duplicate lmb reservations for Device Tree blob.
Signed-off-by: Jon Loeliger <jdl@freescale.com>
Signed-off-by: Paul Mackerras <paulus@samba.org>
diff --git a/arch/powerpc/kernel/prom.c b/arch/powerpc/kernel/prom.c
index d77d24a..6290232 100644
--- a/arch/powerpc/kernel/prom.c
+++ b/arch/powerpc/kernel/prom.c
@@ -1267,13 +1267,16 @@
{
u64 base, size;
u64 *reserve_map;
+ unsigned long self_base;
+ unsigned long self_size;
reserve_map = (u64 *)(((unsigned long)initial_boot_params) +
initial_boot_params->off_mem_rsvmap);
/* before we do anything, lets reserve the dt blob */
- lmb_reserve(__pa((unsigned long)initial_boot_params),
- initial_boot_params->totalsize);
+ self_base = __pa((unsigned long)initial_boot_params);
+ self_size = initial_boot_params->totalsize;
+ lmb_reserve(self_base, self_size);
#ifdef CONFIG_PPC32
/*
@@ -1289,6 +1292,9 @@
size_32 = *(reserve_map_32++);
if (size_32 == 0)
break;
+ /* skip if the reservation is for the blob */
+ if (base_32 == self_base && size_32 == self_size)
+ continue;
DBG("reserving: %x -> %x\n", base_32, size_32);
lmb_reserve(base_32, size_32);
}
@@ -1300,6 +1306,9 @@
size = *(reserve_map++);
if (size == 0)
break;
+ /* skip if the reservation is for the blob */
+ if (base == self_base && size == self_size)
+ continue;
DBG("reserving: %llx -> %llx\n", base, size);
lmb_reserve(base, size);
}