From: Chris Wilson <chris@chris-wilson.co.uk>
To: intel-gfx@lists.freedesktop.org
Subject: [PATCH] drm/i915: Order two completing nop_submit_request
Date: Fri, 6 Oct 2017 12:22:42 +0100 [thread overview]
Message-ID: <20171006112242.26862-1-chris@chris-wilson.co.uk> (raw)
If two nop's (requests in-flight following a wedged device) complete at
the same time, the global_seqno value written to the HWSP is undefined
as the two threads are not serialized.
Fixes: ce1135c7de64 ("drm/i915: Complete requests in nop_submit_request")
Signed-off-by: Chris Wilson <chris@chris-wilson.co.uk>
Cc: Tvrtko Ursulin <tvrtko.ursulin@intel.com>
---
drivers/gpu/drm/i915/i915_gem.c | 5 ++++-
1 file changed, 4 insertions(+), 1 deletion(-)
diff --git a/drivers/gpu/drm/i915/i915_gem.c b/drivers/gpu/drm/i915/i915_gem.c
index ab8c6946fea4..2779bcaff82e 100644
--- a/drivers/gpu/drm/i915/i915_gem.c
+++ b/drivers/gpu/drm/i915/i915_gem.c
@@ -3016,8 +3016,11 @@ static void nop_submit_request(struct drm_i915_gem_request *request)
{
GEM_BUG_ON(!i915_terminally_wedged(&request->i915->gpu_error));
dma_fence_set_error(&request->fence, -EIO);
- i915_gem_request_submit(request);
+
+ spin_lock_irq(&request->engine->timeline->lock);
+ __i915_gem_request_submit(request);
intel_engine_init_global_seqno(request->engine, request->global_seqno);
+ spin_unlock_irq(&request->engine->timeline->lock);
}
static void engine_set_wedged(struct intel_engine_cs *engine)
--
2.14.2
_______________________________________________
Intel-gfx mailing list
Intel-gfx@lists.freedesktop.org
https://lists.freedesktop.org/mailman/listinfo/intel-gfx
next reply other threads:[~2017-10-06 11:22 UTC|newest]
Thread overview: 8+ messages / expand[flat|nested] mbox.gz Atom feed top
2017-10-06 11:22 Chris Wilson [this message]
2017-10-06 11:42 ` [PATCH] drm/i915: Order two completing nop_submit_request Tvrtko Ursulin
2017-10-06 11:53 ` Chris Wilson
2017-10-06 11:56 ` [PATCH v2] " Chris Wilson
2017-10-06 12:23 ` Tvrtko Ursulin
2017-10-06 17:25 ` Chris Wilson
2017-10-06 13:51 ` ✓ Fi.CI.BAT: success for drm/i915: Order two completing nop_submit_request (rev2) Patchwork
2017-10-06 17:08 ` ✗ Fi.CI.IGT: warning " Patchwork
Reply instructions:
You may reply publicly to this message via plain-text email
using any one of the following methods:
* Save the following mbox file, import it into your mail client,
and reply-to-all from there: mbox
Avoid top-posting and favor interleaved quoting:
https://en.wikipedia.org/wiki/Posting_style#Interleaved_style
* Reply using the --to, --cc, and --in-reply-to
switches of git-send-email(1):
git send-email \
--in-reply-to=20171006112242.26862-1-chris@chris-wilson.co.uk \
--to=chris@chris-wilson.co.uk \
--cc=intel-gfx@lists.freedesktop.org \
/path/to/YOUR_REPLY
https://kernel.org/pub/software/scm/git/docs/git-send-email.html
* If your mail client supports setting the In-Reply-To header
via mailto: links, try the mailto: link
Be sure your reply has a Subject: header at the top and a blank line
before the message body.
This is an external index of several public inboxes,
see mirroring instructions on how to clone and mirror
all data and code used by this external index.