ARM: EXYNOS: Fix NULL pointer dereference bug in Origen

When DRM support for Samsung SoC and Samsung S3C framebuffer support
are selected, the kernel crashes as it does not get the required
platform data. Change the compile macro to CONFIG_DRM_EXYNOS_FIMD
to fix this.

Without this patch the following crash occurs during bootup:

Unable to handle kernel NULL pointer dereference at virtual address 00000000
PC is at 0x0
LR is at s3c_fb_probe+0x198/0x788
[<c01520e8>] (s3c_fb_probe+0x198/0x788) from [<c01a3dd4>] (platform_drv_probe+0x18/0x1c)
[<c01a3dd4>] (platform_drv_probe+0x18/0x1c) from [<c01a2b8c>] (driver_probe_device+0x70/0x1f0)
[<c01a2b8c>] (driver_probe_device+0x70/0x1f0) from [<c01a2d98>] (__driver_attach+0x8c/0x90)
[<c01a2d98>] (__driver_attach+0x8c/0x90) from [<c01a14e4>] (bus_for_each_dev+0x50/0x7c)
[<c01a14e4>] (bus_for_each_dev+0x50/0x7c) from [<c01a23f4>] (bus_add_driver+0x170/0x23c)
[<c01a23f4>] (bus_add_driver+0x170/0x23c) from [<c01a324c>] (driver_register+0x78/0x144)
[<c01a324c>] (driver_register+0x78/0x144) from [<c000862c>] (do_one_initcall+0x34/0x174)
[<c000862c>] (do_one_initcall+0x34/0x174) from [<c01de210>] (kernel_init+0x100/0x2a0)
[<c01de210>] (kernel_init+0x100/0x2a0) from [<c000e118>] (ret_from_fork+0x14/0x3c)

Signed-off-by: Sachin Kamat <sachin.kamat@linaro.org>
Signed-off-by: Kukjin Kim <kgene.kim@samsung.com>

diff --git a/arch/arm/mach-exynos/mach-origen.c b/arch/arm/mach-exynos/mach-origen.c
index e6f4191cd14c1af36c5df0ac14bb9d136f2f22e9..5e34b9c16196c4d7009d90e5bb55a596c918ee20 100644 (file)
--- a/arch/arm/mach-exynos/mach-origen.c
+++ b/arch/arm/mach-exynos/mach-origen.c
@@ -621,7 +621,7 @@ static struct pwm_lookup origen_pwm_lookup[] = {
        PWM_LOOKUP("s3c24xx-pwm.0", 0, "pwm-backlight.0", NULL),
 };
 
-#ifdef CONFIG_DRM_EXYNOS
+#ifdef CONFIG_DRM_EXYNOS_FIMD
 static struct exynos_drm_fimd_pdata drm_fimd_pdata = {
        .panel  = {
                .timing = {
@@ -793,7 +793,7 @@ static void __init origen_machine_init(void)
        s5p_i2c_hdmiphy_set_platdata(NULL);
        s5p_hdmi_set_platdata(&hdmiphy_info, NULL, 0);
 
-#ifdef CONFIG_DRM_EXYNOS
+#ifdef CONFIG_DRM_EXYNOS_FIMD
        s5p_device_fimd0.dev.platform_data = &drm_fimd_pdata;
        exynos4_fimd0_gpio_setup_24bpp();
 #else