Created attachment 114570 [details]
dmesg

==System Environment==
--------------------------
Regression: not sure
It fails on 3.19.2 and 3.18.0, works well on the latest -fixes kernel and -nightly kernel.

Non-working platforms: HSW

==kernel==
--------------------------
commit 660613d1a4e94144490850b6c3d350331860fac4
Author: Greg Kroah-Hartman <gregkh@linuxfoundation.org>
Date:   Wed Mar 18 14:11:52 2015 +0100

    Linux 3.19.2

==Bug detailed description==
-----------------------------
It fails on 3.19.2 and 3.18.0 kernel, works well on the latest -fixes kernel and -nightly kernel.
Following cases also fails:
igt@gem_ctx_param_basic@basic-default
igt@gem_ctx_param_basic@invalid-ctx-get
igt@gem_ctx_param_basic@invalid-ctx-set
igt@gem_ctx_param_basic@invalid-size-get
igt@gem_ctx_param_basic@invalid-size-set
igt@gem_ctx_param_basic@non-root-set
igt@gem_ctx_param_basic@root-set

output:
IGT-Version: 1.10-ge7d26df (x86_64) (Linux: 3.19.2_v3.19.2+ x86_64)
Test assertion failure function __real_main49, file gem_ctx_param_basic.c:64:
Failed assertion: drmIoctl(fd, ((((2U|1U) << (((0+8)+8)+14)) | ((('d')) << (0+8)) | (((0x40 + 0x34)) << 0) | ((((sizeof(struct local_i915_gem_context_param)))) << ((0+8)+8)))), &ctx_param) == 0
Last errno: 22, Invalid argument
Subtest basic failed.
**** DEBUG ****
Test assertion failure function __real_main49, file gem_ctx_param_basic.c:64:
Failed assertion: drmIoctl(fd, ((((2U|1U) << (((0+8)+8)+14)) | ((('d')) << (0+8)) | (((0x40 + 0x34)) << 0) | ((((sizeof(struct local_i915_gem_context_param)))) << ((0+8)+8)))), &ctx_param) == 0
Last errno: 22, Invalid argument
****  END  ****
Subtest basic: FAIL (0.000s)

Reproduce steps:
-------------------------
1. ./gem_ctx_param_basic --run-subtest basic