The patch below does not apply to the 3.19-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 762e45836a047323defe9bdbbac534f0675ff027 Mon Sep 17 00:00:00 2001
From: Chris Wilson <chris@xxxxxxxxxxxxxxxxxx>
Date: Wed, 4 Mar 2015 18:09:26 +0000
Subject: [PATCH] drm/i915: Make WAIT_IOCTL negative timeouts be indefinite
again
MIME-Version: 1.0
Content-Type: text/plain; charset=UTF-8
Content-Transfer-Encoding: 8bit
This fixes a regression from
commit 5ed0bdf21a85d78e04f89f15ccf227562177cbd9
Author: Thomas Gleixner <tglx@xxxxxxxxxxxxx>
Date: Wed Jul 16 21:05:06 2014 +0000
drm: i915: Use nsec based interfaces
that made a negative timeout return immediately rather than the
previously defined behaviour of waiting indefinitely.
Testcase: igt/gem_wait
Bugzilla: https://bugs.freedesktop.org/show_bug.cgi?id=89494
Signed-off-by: Chris Wilson <chris@xxxxxxxxxxxxxxxxxx>
Cc: Daniel Vetter <daniel.vetter@xxxxxxxx>
Cc: Ben Widawsky <benjamin.widawsky@xxxxxxxxx>
Cc: Kristian Høgsberg <krh@xxxxxxxxxxxxx>
Cc: stable@xxxxxxxxxxxxxxx
Reviewed-by: Daniel Vetter <daniel.vetter@xxxxxxxx>
[Jani: fixed a checkpatch complaint about whitespace.]
Signed-off-by: Jani Nikula <jani.nikula@xxxxxxxxx>
diff --git a/drivers/gpu/drm/i915/i915_gem.c b/drivers/gpu/drm/i915/i915_gem.c
index e5daad5f75fb..ac7fe39d38a3 100644
--- a/drivers/gpu/drm/i915/i915_gem.c
+++ b/drivers/gpu/drm/i915/i915_gem.c
@@ -2936,9 +2936,9 @@ i915_gem_wait_ioctl(struct drm_device *dev, void *data, struct drm_file *file)
req = obj->last_read_req;
/* Do this after OLR check to make sure we make forward progress polling
- * on this IOCTL with a timeout <=0 (like busy ioctl)
+ * on this IOCTL with a timeout == 0 (like busy ioctl)
*/
- if (args->timeout_ns <= 0) {
+ if (args->timeout_ns == 0) {
ret = -ETIME;
goto out;
}
@@ -2948,7 +2948,8 @@ i915_gem_wait_ioctl(struct drm_device *dev, void *data, struct drm_file *file)
i915_gem_request_reference(req);
mutex_unlock(&dev->struct_mutex);
- ret = __i915_wait_request(req, reset_counter, true, &args->timeout_ns,
+ ret = __i915_wait_request(req, reset_counter, true,
+ args->timeout_ns > 0 ? &args->timeout_ns : NULL,
file->driver_priv);
mutex_lock(&dev->struct_mutex);
i915_gem_request_unreference(req);
--
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