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Subject[PATCH -next] drm/i915/gt: fix spelling mistake "undeflow" -> "underflow"
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There is a spelling mistake in comment, fix it.

Signed-off-by: Chen Zhou <chenzhou10@huawei.com>
---
drivers/gpu/drm/i915/gt/intel_engine_pm.c | 2 +-
1 file changed, 1 insertion(+), 1 deletion(-)

diff --git a/drivers/gpu/drm/i915/gt/intel_engine_pm.c b/drivers/gpu/drm/i915/gt/intel_engine_pm.c
index b6cf284..3be6797 100644
--- 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);
--
2.7.4
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