提交 f0a9f74c 编写于 作者: B Ben Widawsky 提交者: Daniel Vetter

drm/i915: Fix disabled semaphores

The ring will emit too many if semaphores are disabled since we do not
add the correct number to num_dwords anymore.

This was introduced:
commit 52ed2325
Author: Ben Widawsky <benjamin.widawsky@intel.com>
Date:   Mon Dec 16 20:50:38 2013 -0800

    drm/i915: Don't emit mbox updates without semaphores

FWIW, the bug was fixed later in the series.

/me hangs head in shame.

Daniel: Also note that we should have merged the read-only semaphore
modparam before this patch.
Reported-by: NKenneth Graunke <kenneth@whitecape.org>
Signed-off-by: NBen Widawsky <ben@bwidawsk.net>
Signed-off-by: NDaniel Vetter <daniel.vetter@ffwll.ch>
上级 8b78f0e5
......@@ -673,10 +673,12 @@ gen6_add_request(struct intel_ring_buffer *ring)
if (ret)
return ret;
for_each_ring(useless, dev_priv, i) {
u32 mbox_reg = ring->signal_mbox[i];
if (mbox_reg != GEN6_NOSYNC)
update_mboxes(ring, mbox_reg);
if (i915_semaphore_is_enabled(dev)) {
for_each_ring(useless, dev_priv, i) {
u32 mbox_reg = ring->signal_mbox[i];
if (mbox_reg != GEN6_NOSYNC)
update_mboxes(ring, mbox_reg);
}
}
intel_ring_emit(ring, MI_STORE_DWORD_INDEX);
......
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