The patch below does not apply to the 4.16-stable tree.
If someone wants it applied there, or to any other stable or longterm
tree, then please email the backport, including the original git commit
id to <stable@xxxxxxxxxxxxxxx>.
thanks,
greg k-h
------------------ original commit in Linus's tree ------------------
>From b6a88e4a804cf5a71159906e16df2c1fc7196f92 Mon Sep 17 00:00:00 2001
From: Daniele Ceraolo Spurio <daniele.ceraolospurio@xxxxxxxxx>
Date: Wed, 14 Feb 2018 11:18:25 -0800
Subject: [PATCH] drm/i915: Fix rsvd2 mask when out-fence is returned
GENMASK_ULL wants the high bit of the mask first. The current value
cancels the in-fence when an out-fence is returned.
Fixes: fec0445caa273 ("drm/i915: Support explicit fencing for execbuf")
Testcase: igt/gem_exec_fence/keep-in-fence*
Cc: Chris Wilson <chris@xxxxxxxxxxxxxxxxxx>
Signed-off-by: Daniele Ceraolo Spurio <daniele.ceraolospurio@xxxxxxxxx>
Reviewed-by: Chris Wilson <chris@xxxxxxxxxxxxxxxxxx>
Signed-off-by: Chris Wilson <chris@xxxxxxxxxxxxxxxxxx>
Link: https://patchwork.freedesktop.org/patch/msgid/20180214191827.8465-1-daniele.ceraolospurio@xxxxxxxxx
Cc: <stable@xxxxxxxxxxxxxxx> # v4.12+
diff --git a/drivers/gpu/drm/i915/i915_gem_execbuffer.c b/drivers/gpu/drm/i915/i915_gem_execbuffer.c
index b15305f2fb76..ed6e9db51e67 100644
--- a/drivers/gpu/drm/i915/i915_gem_execbuffer.c
+++ b/drivers/gpu/drm/i915/i915_gem_execbuffer.c
@@ -2410,7 +2410,7 @@ i915_gem_do_execbuffer(struct drm_device *dev,
if (out_fence) {
if (err == 0) {
fd_install(out_fence_fd, out_fence->file);
- args->rsvd2 &= GENMASK_ULL(0, 31); /* keep in-fence */
+ args->rsvd2 &= GENMASK_ULL(31, 0); /* keep in-fence */
args->rsvd2 |= (u64)out_fence_fd << 32;
out_fence_fd = -1;
} else {