[PATCH 6.1 133/164] drm/panfrost: Fix the panfrost_mmu_map_fault_addr() error path

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From: Boris Brezillon <boris.brezillon@xxxxxxxxxxxxx>

commit 764a2ab9eb56e1200083e771aab16186836edf1d upstream.

Make sure all bo->base.pages entries are either NULL or pointing to a
valid page before calling drm_gem_shmem_put_pages().

Reported-by: Tomeu Vizoso <tomeu.vizoso@xxxxxxxxxxxxx>
Cc: <stable@xxxxxxxxxxxxxxx>
Fixes: 187d2929206e ("drm/panfrost: Add support for GPU heap allocations")
Signed-off-by: Boris Brezillon <boris.brezillon@xxxxxxxxxxxxx>
Reviewed-by: Steven Price <steven.price@xxxxxxx>
Link: https://patchwork.freedesktop.org/patch/msgid/20210521093811.1018992-1-boris.brezillon@xxxxxxxxxxxxx
Signed-off-by: Greg Kroah-Hartman <gregkh@xxxxxxxxxxxxxxxxxxx>
---
 drivers/gpu/drm/panfrost/panfrost_mmu.c |    1 +
 1 file changed, 1 insertion(+)

--- a/drivers/gpu/drm/panfrost/panfrost_mmu.c
+++ b/drivers/gpu/drm/panfrost/panfrost_mmu.c
@@ -504,6 +504,7 @@ static int panfrost_mmu_map_fault_addr(s
 		if (IS_ERR(pages[i])) {
 			mutex_unlock(&bo->base.pages_lock);
 			ret = PTR_ERR(pages[i]);
+			pages[i] = NULL;
 			goto err_pages;
 		}
 	}





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