drm/i915/gt: fix spelling mistake "undeflow" -> "underflow"

There is a spelling mistake in comment, fix it.

Signed-off-by: Chen Zhou <chenzhou10@huawei.com>
Reviewed-by: Chris Wilson <chris@chris-wilson.co.uk>
Signed-off-by: Chris Wilson <chris@chris-wilson.co.uk>
Link: https://patchwork.freedesktop.org/patch/msgid/20200401022506.52965-1-chenzhou10@huawei.com

diff --git a/drivers/gpu/drm/i915/gt/intel_engine_pm.c b/drivers/gpu/drm/i915/gt/intel_engine_pm.c
index b6cf284e3a2d5b970ee7c144a78ad5bef53a03d7..3be679741d226884ef8327450360748676118135 100644 (file)
--- a/drivers/gpu/drm/i915/gt/intel_engine_pm.c
+++ b/drivers/gpu/drm/i915/gt/intel_engine_pm.c
@@ -181,7 +181,7 @@ static bool switch_to_kernel_context(struct intel_engine_cs *engine)
         * Ergo, if we put ourselves on the timelines.active_list
         * (se intel_timeline_enter()) before we increment the
         * engine->wakeref.count, we may see the request completion and retire
-        * it causing an undeflow of the engine->wakeref.
+        * it causing an underflow of the engine->wakeref.
         */
        flags = __timeline_mark_lock(ce);
        GEM_BUG_ON(atomic_read(&ce->timeline->active_count) < 0);