[PATCH] drm/amdkfd: handle errors from svm validate and map

[Philip Yang]

If new range is added to update list, splited to multiple pranges with
max_svm_range_pages alignment, and svm validate and map returns error
for the first prange, then the caller retry should add pranges with
prange->is_error_flag or prange without prange->mapped_to_gpu to the
update list, to update GPU mapping for the entire range.

Fixes: c22b04407097 ("drm/amdkfd: flag added to handle errors from svm validate and map")
Signed-off-by: Philip Yang <Philip.Yang at amd.com>
Tested-by: James Zhu <james.zhu at amd.com>
---
 drivers/gpu/drm/amd/amdkfd/kfd_svm.c | 5 +++--
 1 file changed, 3 insertions(+), 2 deletions(-)

diff --git a/drivers/gpu/drm/amd/amdkfd/kfd_svm.c b/drivers/gpu/drm/amd/amdkfd/kfd_svm.c
index 61dd66bddc3c..8871329e9cbd 100644
--- a/drivers/gpu/drm/amd/amdkfd/kfd_svm.c
+++ b/drivers/gpu/drm/amd/amdkfd/kfd_svm.c
@@ -825,7 +825,7 @@ svm_range_is_same_attrs(struct kfd_process *p, struct svm_range *prange,
 		}
 	}
 
-	return !prange->is_error_flag;
+	return true;
 }
 
 /**
@@ -2228,7 +2228,8 @@ svm_range_add(struct kfd_process *p, uint64_t start, uint64_t size,
 		next = interval_tree_iter_next(node, start, last);
 		next_start = min(node->last, last) + 1;
 
-		if (svm_range_is_same_attrs(p, prange, nattr, attrs)) {
+		if (!prange->is_error_flag && prange->mapped_to_gpu &&
+		    svm_range_is_same_attrs(p, prange, nattr, attrs)) {
 			/* nothing to do */
 		} else if (node->start < start || node->last > last) {
 			/* node intersects the update range and its attributes
-- 
2.35.1