diff options
| author |   David Hildenbrand <david@redhat.com> | 2025-01-24 19:15:23 +0100 |
|---|---|---|
| committer |   Danilo Krummrich <dakr@kernel.org> | 2025-02-14 15:52:58 +0100 |
| commit | b3fefbb30a1691533cb905006b69b2a474660744 (patch) | |
| tree | 62b891bc81a786a08ff8f4f1a8c7cbcce7f945f5 | |
| parent | drm: panel: jd9365da-h3: fix reset signal polarity (diff) | |
| download | wireguard-linux-b3fefbb30a1691533cb905006b69b2a474660744.tar.xz wireguard-linux-b3fefbb30a1691533cb905006b69b2a474660744.zip | |
nouveau/svm: fix missing folio unlock + put after make_device_exclusive_range()
In case we have to retry the loop, we are missing to unlock+put the
folio. In that case, we will keep failing make_device_exclusive_range()
because we cannot grab the folio lock, and even return from the function
with the folio locked and referenced, effectively never succeeding the
make_device_exclusive_range().
While at it, convert the other unlock+put to use a folio as well.
This was found by code inspection.
Fixes: 8f187163eb89 ("nouveau/svm: implement atomic SVM access")
Signed-off-by: David Hildenbrand <david@redhat.com>
Reviewed-by: Alistair Popple <apopple@nvidia.com>
Tested-by: Alistair Popple <apopple@nvidia.com>
Signed-off-by: Danilo Krummrich <dakr@kernel.org>
Link: https://patchwork.freedesktop.org/patch/msgid/20250124181524.3584236-2-david@redhat.com
Diffstat (limited to '')
| -rw-r--r-- | drivers/gpu/drm/nouveau/nouveau_svm.c | 9 |
1 files changed, 7 insertions, 2 deletions
diff --git a/drivers/gpu/drm/nouveau/nouveau_svm.c b/drivers/gpu/drm/nouveau/nouveau_svm.c index b4da82ddbb6b..8ea98f06d39a 100644 --- a/drivers/gpu/drm/nouveau/nouveau_svm.c +++ b/drivers/gpu/drm/nouveau/nouveau_svm.c @@ -590,6 +590,7 @@ static int nouveau_atomic_range_fault(struct nouveau_svmm *svmm, unsigned long timeout = jiffies + msecs_to_jiffies(HMM_RANGE_DEFAULT_TIMEOUT); struct mm_struct *mm = svmm->notifier.mm; + struct folio *folio; struct page *page; unsigned long start = args->p.addr; unsigned long notifier_seq; @@ -616,12 +617,16 @@ static int nouveau_atomic_range_fault(struct nouveau_svmm *svmm, ret = -EINVAL; goto out; } + folio = page_folio(page); mutex_lock(&svmm->mutex); if (!mmu_interval_read_retry(¬ifier->notifier, notifier_seq)) break; mutex_unlock(&svmm->mutex); + + folio_unlock(folio); + folio_put(folio); } /* Map the page on the GPU. */ @@ -637,8 +642,8 @@ static int nouveau_atomic_range_fault(struct nouveau_svmm *svmm, ret = nvif_object_ioctl(&svmm->vmm->vmm.object, args, size, NULL); mutex_unlock(&svmm->mutex); - unlock_page(page); - put_page(page); + folio_unlock(folio); + folio_put(folio); out: mmu_interval_notifier_remove(¬ifier->notifier); |