[Intel-gfx] [PATCH] drm/i915/gtt: Allocate va range only if vma is not bound

[shuang.he at intel.com]

Tested-By: Intel Graphics QA PRTS (Patch Regression Test System Contact: shuang.he at intel.com)
Task id: 6285
-------------------------------------Summary-------------------------------------
Platform          Delta          drm-intel-nightly          Series Applied
PNV                                  276/276              276/276
ILK                                  302/302              302/302
SNB                                  316/316              316/316
IVB                                  264/264              264/264
BYT                 -4              227/227              223/227
BDW                                  318/318              318/318
-------------------------------------Detailed-------------------------------------
Platform  Test                                drm-intel-nightly          Series Applied
 BYT  igt at gem_double_irq_loop      DMESG_WARN(1)PASS(3)      DMESG_WARN(1)PASS(1)
(dmesg patch applied)drm:check_crtc_state[i915]]*ERROR*mismatch_in_has_infoframe(expected#,found#)@mismatch in has_infoframe .* found
WARNING:at_drivers/gpu/drm/i915/intel_display.c:#check_crtc_state[i915]()@WARNING:.* at .* check_crtc_state+0x
*BYT  igt at gem_dummy_reloc_loop@render      FAIL(1)PASS(9)      TIMEOUT(1)PASS(1)
 BYT  igt at gem_pipe_control_store_loop@fresh-buffer      FAIL(1)TIMEOUT(4)PASS(6)      TIMEOUT(1)PASS(1)
*BYT  igt at gem_storedw_batches_loop@secure-dispatch      FAIL(1)PASS(2)      DMESG_WARN(1)PASS(1)
(dmesg patch applied)drm:check_crtc_state[i915]]*ERROR*mismatch_in_has_infoframe(expected#,found#)@mismatch in has_infoframe .* found
WARNING:at_drivers/gpu/drm/i915/intel_display.c:#check_crtc_state[i915]()@WARNING:.* at .* check_crtc_state+0x
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