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drm/gpusvm: Allow device pages to be mapped in mixed mappings after system pages

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The current code rejects device mappings whenever system pages have
already been encountered. This is not the intended behavior when
allow_mixed is set.

Relax the restriction by permitting a single pagemap to be selected when
allow_mixed is enabled, even if system pages were found earlier.

Fixes: bce13d6ecd ("drm/gpusvm, drm/xe: Allow mixed mappings for userptr")
Cc: stable@vger.kernel.org
Signed-off-by: Matthew Brost <matthew.brost@intel.com>
Reviewed-by: Francois Dugast <francois.dugast@intel.com>
Link: https://patch.msgid.link/20260130194928.3255613-3-matthew.brost@intel.com
This commit is contained in:
Matthew Brost
2026-01-30 11:49:28 -08:00
parent 556dba9547
commit ec49857ad1
1 changed files with 1 additions and 1 deletions
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2
drivers/gpu/drm/drm_gpusvm.c
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@@ -1495,7 +1495,7 @@ int drm_gpusvm_get_pages(struct drm_gpusvm *gpusvm,
}
zdd = page->zone_device_data;
if (pagemap != page_pgmap(page)) {
if (i > 0) {
if (pagemap) {
err = -EOPNOTSUPP;
goto err_unmap;
}