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drm/gpusvm: Limit the number of retries in drm_gpusvm_get_pages

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drm_gpusvm_get_pages should not be allowed to retry forever, cap the
time spent in the function to HMM_RANGE_DEFAULT_TIMEOUT has this is
essentially a wrapper around hmm_range_fault.

Signed-off-by: Matthew Brost <matthew.brost@intel.com>
Reviewed-by: Himal Prasad Ghimiray <himal.prasad.ghimiray@intel.com>
Link: https://patch.msgid.link/20251122012502.382587-1-matthew.brost@intel.com
This commit is contained in:
Matthew Brost
2025-11-21 17:25:01 -08:00
parent dacda0cf75
commit 9fb1f1256e
1 changed files with 3 additions and 0 deletions
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3
drivers/gpu/drm/drm_gpusvm.c
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@@ -1288,6 +1288,9 @@ int drm_gpusvm_get_pages(struct drm_gpusvm *gpusvm,
DMA_BIDIRECTIONAL;
retry:
if (time_after(jiffies, timeout))
return -EBUSY;
hmm_range.notifier_seq = mmu_interval_read_begin(notifier);
if (drm_gpusvm_pages_valid_unlocked(gpusvm, svm_pages))
goto set_seqno;