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--- a/drivers/mtd/mtdconcat.c
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+++ b/drivers/mtd/mtdconcat.c
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@@ -619,7 +619,8 @@ static void concat_sync(struct mtd_info
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for (i = 0; i < concat->num_subdev; i++) {
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struct mtd_info *subdev = concat->subdev[i];
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- subdev->sync(subdev);
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+ if (subdev->sync)
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+ subdev->sync(subdev);
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}
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}
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