drm/i915: Silence compiler for csr_load_work_fn()

gcc-4.7 is not very smart and can not tell that "si" is guarded by size
being 0. So it complains,

drivers/gpu/drm/i915/intel_csr.c: In function ‘csr_load_work_fn’:
drivers/gpu/drm/i915/intel_csr.c:204:3: warning: ‘si’ may be used uninitialized in this function [-Wmaybe-uninitialized]
drivers/gpu/drm/i915/intel_csr.c:190:30: note: ‘si’ was declared in

Give in and mark si as NULL.

Signed-off-by: Chris Wilson <[email protected]>
Cc: Anusha Srivatsa <[email protected]>
Cc: Rodrigo Vivi <[email protected]>
Cc: Imre Deak <[email protected]>
Link: https://patchwork.freedesktop.org/patch/msgid/[email protected]
Reviewed-by: Gabriel Krisman Bertazi <[email protected]>
Reviewed-by: Michal Wajdeczko <[email protected]>

diff --git a/drivers/gpu/drm/i915/intel_csr.c b/drivers/gpu/drm/i915/intel_csr.c
index 3e1f86d0c6cc2b4ec752111cfb5261963d7c2f92..77d8b3d483ca206e4fa7f4b37c3a778526ce079f 100644 (file)
--- a/drivers/gpu/drm/i915/intel_csr.c
+++ b/drivers/gpu/drm/i915/intel_csr.c
@@ -198,6 +198,7 @@ intel_get_stepping_info(struct drm_i915_private *dev_priv)
                si = bxt_stepping_info;
        } else {
                size = 0;
+               si = NULL;
        }
 
        if (INTEL_REVID(dev_priv) < size)