In Indirect context w/a batch buffer,
+WaFlushCoherentL3CacheLinesAtContextSwitch:bdw

v2: address static checker warning where unsigned value was checked for
less than zero which is never true.

Reported-by: Dan Carpenter <[email protected]>
Cc: Imre Deak <[email protected]>
Signed-off-by: Arun Siluvery <[email protected]>
---
 drivers/gpu/drm/i915/intel_lrc.c | 7 +++++++
 1 file changed, 7 insertions(+)

diff --git a/drivers/gpu/drm/i915/intel_lrc.c b/drivers/gpu/drm/i915/intel_lrc.c
index 6a0b128..7536682 100644
--- a/drivers/gpu/drm/i915/intel_lrc.c
+++ b/drivers/gpu/drm/i915/intel_lrc.c
@@ -1253,6 +1253,7 @@ static int gen9_init_indirectctx_bb(struct 
intel_engine_cs *ring,
                                    uint32_t *const batch,
                                    uint32_t *offset)
 {
+       int ret;
        struct drm_device *dev = ring->dev;
        uint32_t index = wa_ctx_start(wa_ctx, *offset, CACHELINE_DWORDS);
 
@@ -1261,6 +1262,12 @@ static int gen9_init_indirectctx_bb(struct 
intel_engine_cs *ring,
            (IS_BROXTON(dev) && (INTEL_REVID(dev) == BXT_REVID_A0)))
                wa_ctx_emit(batch, MI_ARB_ON_OFF | MI_ARB_DISABLE);
 
+       /* WaFlushCoherentL3CacheLinesAtContextSwitch:skl,bxt */
+       ret = gen8_emit_flush_coherentl3_wa(ring, batch, index);
+       if (ret < 0)
+               return ret;
+       index = ret;
+
        /* Pad to end of cacheline */
        while (index % CACHELINE_DWORDS)
                wa_ctx_emit(batch, MI_NOOP);
-- 
1.9.1

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