OMAP4: avoid null pointer access in save_boot_params
When booting via spl the parameter layout is apparently different
and this leads to following bad pointers.
For now just work around the issue by checking pointers before
following them.
Signed-off-by: John Rigby <john.rigby@linaro.org>
diff --git a/arch/arm/cpu/armv7/omap-common/lowlevel_init.S b/arch/arm/cpu/armv7/omap-common/lowlevel_init.S
index 3581077..d5b2ed4 100644
--- a/arch/arm/cpu/armv7/omap-common/lowlevel_init.S
+++ b/arch/arm/cpu/armv7/omap-common/lowlevel_init.S
@@ -66,7 +66,13 @@
bgt 2f
/* Store the boot mode (raw/FAT) in omap_bootmode */
ldr r2, [r0, #DEV_DESC_PTR_OFFSET] @ get the device descriptor ptr
+ bic r3, r2, #255
+ cmp r3, #0
+ beq 1f
ldr r2, [r2, #DEV_DATA_PTR_OFFSET] @ get the pDeviceData ptr
+ bic r3, r2, #255
+ cmp r3, #0
+ beq 1f
ldr r2, [r2, #BOOT_MODE_OFFSET] @ get the boot mode
ldr r3, =omap_bootmode
str r2, [r3]