[PATCH] drm/i915/dmc: Add dmc null check

[Suraj Kandpal]

Add dmc null check before dereferncing to get the major and minor
version.

Signed-off-by: Suraj Kandpal <suraj.kand...@intel.com>
---
 drivers/gpu/drm/i915/display/intel_dmc.c | 5 +++--
 1 file changed, 3 insertions(+), 2 deletions(-)

diff --git a/drivers/gpu/drm/i915/display/intel_dmc.c 
b/drivers/gpu/drm/i915/display/intel_dmc.c
index 48bbbf8f312c..8c193de0e253 100644
--- a/drivers/gpu/drm/i915/display/intel_dmc.c
+++ b/drivers/gpu/drm/i915/display/intel_dmc.c
@@ -1263,8 +1263,9 @@ static int intel_dmc_debugfs_status_show(struct seq_file 
*m, void *unused)
        if (!intel_dmc_has_payload(display))
                goto out;
 
-       seq_printf(m, "version: %d.%d\n", DMC_VERSION_MAJOR(dmc->version),
-                  DMC_VERSION_MINOR(dmc->version));
+       if (dmc)
+               seq_printf(m, "version: %d.%d\n", 
DMC_VERSION_MAJOR(dmc->version),
+                          DMC_VERSION_MINOR(dmc->version));
 
        if (DISPLAY_VER(display) >= 12) {
                i915_reg_t dc3co_reg;
-- 
2.43.2