evie/android_kernel_oneplus_msm8998
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drm/msm: Map command buffers to kernel only if required

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Map command buffers to the kernel address space only if
relocs are specified for the submission. This reduces some
overhead on the submission path.

Change-Id: I32ca3c7fe2147c835a328e0c8937b45f2f3d59b9
Signed-off-by: Sushmita Susheelendra <ssusheel@codeaurora.org>
This commit is contained in:
Sushmita Susheelendra 2017-08-10 12:18:42 -06:00
parent 214aa354fd
commit c6820d61e2
1 changed files with 3 additions and 0 deletions
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3
drivers/gpu/drm/msm/msm_gem_submit.c
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@ -334,6 +334,9 @@ static int submit_reloc(struct msm_gem_submit *submit, struct msm_gem_object *ob
return -EINVAL;
}
if (nr_relocs == 0)
return 0;
/* For now, just map the entire thing. Eventually we probably
* to do it page-by-page, w/ kmap() if not vmap()d..
*/