1 files changed, 5 insertions, 0 deletions

diff --git a/drivers/gpu/drm/etnaviv/etnaviv_dump.c b/drivers/gpu/drm/etnaviv/etnaviv_dump.c
index 33854c94cb85..515515ef24f9 100644
--- a/drivers/gpu/drm/etnaviv/etnaviv_dump.c
+++ b/drivers/gpu/drm/etnaviv/etnaviv_dump.c
@@ -125,6 +125,8 @@ void etnaviv_core_dump(struct etnaviv_gpu *gpu)
                 return;
         etnaviv_dump_core = false;
 
+        mutex_lock(&gpu->mmu->lock);
+
         mmu_size = etnaviv_iommu_dump_size(gpu->mmu);
 
         /* We always dump registers, mmu, ring and end marker */
@@ -167,6 +169,7 @@ void etnaviv_core_dump(struct etnaviv_gpu *gpu)
         iter.start = __vmalloc(file_size, GFP_KERNEL | __GFP_NOWARN | __GFP_NORETRY,
                                PAGE_KERNEL);
         if (!iter.start) {
+                mutex_unlock(&gpu->mmu->lock);
                 dev_warn(gpu->dev, "failed to allocate devcoredump file\n");
                 return;
         }
@@ -234,6 +237,8 @@ void etnaviv_core_dump(struct etnaviv_gpu *gpu)
                                          obj->base.size);
         }
 
+        mutex_unlock(&gpu->mmu->lock);
+
         etnaviv_core_dump_header(&iter, ETDUMP_BUF_END, iter.data);
 
         dev_coredumpv(gpu->dev, iter.start, iter.data - iter.start, GFP_KERNEL);