Bug 64898

Summary: [3.9.3]igt/gem_tiling_max_stride core dumped
Product: DRI Reporter: lu hua <huax.lu>
Component: DRM/IntelAssignee: Intel GFX Bugs mailing list <intel-gfx-bugs>
Status: CLOSED WONTFIX QA Contact: Intel GFX Bugs mailing list <intel-gfx-bugs>
Severity: major    
Priority: medium CC: xunx.fang, yangweix.shui
Version: unspecified   
Hardware: All   
OS: Linux (All)   
Whiteboard:
i915 platform: i915 features:

Description lu hua 2013-05-23 08:32:32 UTC 
System Environment:
--------------------------
Platform:         Pineview/Ironlake/Sandybridge/Ivybridge/Haswell
Kernel: (linux-3.9.y)4bb08696fab71294c8f1c134a21be9159f82ba08

Bug detailed description:
-------------------------
It core dumped on 3.9.3 kernel.
It also happens on 3.8.2 kernel(commit:19b00d2dc9bedf0856e366cb7b9c7733ded659e4)

output:
gem_tiling_max_stride: gem_tiling_max_stride.c:58: do_test_invalid_tiling: Assertion `ret == -1 && (*__errno_location ()) == 22' failed.
Aborted (core dumped)

dmesg:
[   57.687223] [drm:i915_driver_open],
[   57.687236] [drm:intel_crtc_set_config], [CRTC:3] [FB:40] #connectors=1 (x y) (0 0)
[   57.687240] [drm:intel_modeset_stage_output_state], [CONNECTOR:12:HDMI-A-1] to [CRTC:3]
[   57.687242] [drm:intel_crtc_set_config], [CRTC:5] [NOFB]
[   57.687244] [drm:intel_modeset_stage_output_state], [CONNECTOR:12:HDMI-A-1] to [CRTC:3]
[   57.687245] [drm:intel_crtc_set_config], [CRTC:7] [NOFB]
[   57.687246] [drm:intel_modeset_stage_output_state], [CONNECTOR:12:HDMI-A-1] to [CRTC:3]
[   57.687251] [drm:i915_driver_open],
[   57.712782] [drm:intel_crtc_set_config], [CRTC:3] [FB:40] #connectors=1 (x y) (0 0)
[   57.712787] [drm:intel_modeset_stage_output_state], [CONNECTOR:12:HDMI-A-1] to [CRTC:3]
[   57.712789] [drm:intel_crtc_set_config], [CRTC:5] [NOFB]
[   57.712790] [drm:intel_modeset_stage_output_state], [CONNECTOR:12:HDMI-A-1] to [CRTC:3]
[   57.712792] [drm:intel_crtc_set_config], [CRTC:7] [NOFB]
[   57.712793] [drm:intel_modeset_stage_output_state], [CONNECTOR:12:HDMI-A-1] to [CRTC:3]

Reproduce steps:
----------------
1. ./gem_tiling_max_stride
Comment 1 Daniel Vetter 2013-05-23 09:00:47 UTC 
Can you please test whether backporting

commit fe48d8de34eeaefb2c71dab68ea7c236f06e5877
Author: Ville Syrjälä <ville.syrjala@linux.intel.com>
Date:   Tue Apr 9 20:09:13 2013 +0300

    drm/i915: Reject fence stride=0 on gen4+

fixes the test-failure?
Comment 2 lu hua 2013-05-24 05:54:39 UTC 
It works well on drm-intel-fixes and drm-intel-next-queued kernel.
3a062478308187d4b4d0ef546a16e66852d03489 fixed this issue on drm-intel-next-queued branch.
commit 3a062478308187d4b4d0ef546a16e66852d03489
Author: Ville Syrjälä <ville.syrjala@linux.intel.com>
Date:   Tue Apr 9 11:45:05 2013 +0300

    drm/i915: Increase max fence pitch limit to 256KB on IVB+

    BSpec contains several scattered notes which state that the maximum
    fence stride was increased to 256KB on IVB.

    Testing on real hardware agrees.

    Signed-off-by: Ville Syrjälä <ville.syrjala@linux.intel.com>
    Signed-off-by: Daniel Vetter <daniel.vetter@ffwll.ch>
Comment 3 Chris Wilson 2013-05-24 13:28:33 UTC 
I don't regard stride==0 failure as a stable candidate, it should just result in corruption and nothing more.
Comment 4 Daniel Vetter 2013-05-24 19:41:26 UTC 
Yeah, agreed that do not need to backport the patch. So closing as wontfix (for 3.9 and older at least).
Comment 5 lu hua 2013-06-09 05:20:22 UTC 
*** Bug 65557 has been marked as a duplicate of this bug. ***

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