dma-mapping regression fixes for 5.3

- fix alignment issues introduced in the CMA allocation rework
    (Nicolin Chen)
 -----BEGIN PGP SIGNATURE-----
 
 iQI/BAABCgApFiEEgdbnc3r/njty3Iq9D55TZVIEUYMFAl1DE+YLHGhjaEBsc3Qu
 ZGUACgkQD55TZVIEUYOrkA//Y7YxsJ9MaI0DNu9gYbYHg9u4ORBWXJ4fN67g2AUe
 rdrHdEHyd4uYduy4Ggi65oknfMZms6xYHGaFr1iDforBmOk0CXfvovocHzJkcV/R
 gtHSkp0L+SVmsLrWFXjd7pbkVhBziLEVrFlw07FbtBlNIeS2VvcAnU+CUcTKpxNi
 7MHhCqxTjVuUZ/qRKyyAnKHGoLCdLqTvpaf1uJq9ca838I/9E5UqitaxL/72G7ab
 q/fe93d94Xj3QNk+ekim6xBSD82VPU+OnFUf+f5dELDwyhgI0LAtz6iL8gH+NnK1
 P9cIIs2sFyBLXRQEaRXF5KhA97sjlWLioXYWs/AxvCphDeb1Zk4u3uGn0bGt90fQ
 g8DryY++nVo6sKpFsaNN7RQ9w/LfxejIcf0hVbNfH6tP8KDO19ds/05kE4O2LUC2
 gLOmPMt+dIOJlBQY0fUNrZN/IH6u60LnULmCWDiy7iY7VBJOf+H3zXM0UAJ+XEbs
 l2OG5vxkQ4hnFZVD1csNRd9gKYyjhrqOA0VssopgdBS53/seYMNopSbQsMTdp8J7
 V3c7Rozz3f62pwxJ7Jd7AwCgpvw8zHOESb5WOzi5DEmxAqRaJQ80H2DdAvQc3orL
 x0SummHKX2mY0cJdrFFbXkGoYt3sjJ+J6P+0CP11UIEIqtw4Zfa2hyWmbs8Q9SFt
 KYg=
 =rM5q
 -----END PGP SIGNATURE-----

Merge tag 'dma-mapping-5.3-3' of git://git.infradead.org/users/hch/dma-mapping

Pull dma-mapping regression fixes from Christoph Hellwig:
 "Two related regression fixes for changes from this merge window to fix
  alignment issues introduced in the CMA allocation rework (Nicolin
  Chen)"

* tag 'dma-mapping-5.3-3' of git://git.infradead.org/users/hch/dma-mapping:
  dma-contiguous: page-align the size in dma_free_contiguous()
  dma-contiguous: do not overwrite align in dma_alloc_contiguous()

kernel/dma/contiguous.c

@@ -243,8 +243,9 @@ struct page *dma_alloc_contiguous(struct device *dev, size_t size, gfp_t gfp)
 
 	/* CMA can be used only in the context which permits sleeping */
 	if (cma && gfpflags_allow_blocking(gfp)) {
-		align = min_t(size_t, align, CONFIG_CMA_ALIGNMENT);
-		page = cma_alloc(cma, count, align, gfp & __GFP_NOWARN);
+		size_t cma_align = min_t(size_t, align, CONFIG_CMA_ALIGNMENT);
+
+		page = cma_alloc(cma, count, cma_align, gfp & __GFP_NOWARN);
 	}
 
 	/* Fallback allocation of normal pages */
@@ -266,7 +267,8 @@ struct page *dma_alloc_contiguous(struct device *dev, size_t size, gfp_t gfp)
  */
 void dma_free_contiguous(struct device *dev, struct page *page, size_t size)
 {
-	if (!cma_release(dev_get_cma_area(dev), page, size >> PAGE_SHIFT))
+	if (!cma_release(dev_get_cma_area(dev), page,
+			 PAGE_ALIGN(size) >> PAGE_SHIFT))
 		__free_pages(page, get_order(size));
 }