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Merge branch 'drm-etnaviv-fixes' of https://git.pengutronix.de/git/lst/linux into drm-fixes

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a single fix for a FE hang after IOVA rollover on GC3000. This isn't
pretty, but is the minimal fix for the issue. A larger rework of the
code, that will also fix this issue properly, is currently in the works,
but that needs to wait for at least the next feature pull.

* 'drm-etnaviv-fixes' of https://git.pengutronix.de/git/lst/linux:
  drm/etnaviv: trick drm_mm into giving out a low IOVA
This commit is contained in:
Dave Airlie 2017-01-23 09:25:00 +10:00
commit 2f39258e57
1 changed files with 6 additions and 1 deletions
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7
drivers/gpu/drm/etnaviv/etnaviv_mmu.c
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@ -116,9 +116,14 @@ static int etnaviv_iommu_find_iova(struct etnaviv_iommu *mmu,
struct list_head list;
bool found;
/*
* XXX: The DRM_MM_SEARCH_BELOW is really a hack to trick
* drm_mm into giving out a low IOVA after address space
* rollover. This needs a proper fix.
*/
ret = drm_mm_insert_node_in_range(&mmu->mm, node,
size, 0, mmu->last_iova, ~0UL,
DRM_MM_SEARCH_DEFAULT);
mmu->last_iova ? DRM_MM_SEARCH_DEFAULT : DRM_MM_SEARCH_BELOW);
if (ret != -ENOSPC)
break;