dma-mapping: implement dmam_alloc_coherent using dmam_alloc_attrs

dmam_alloc_coherent is just the default no-flags case of dmam_alloc_attrs, so take advantage of this similar to the non-managed version.

Christoph Hellwig committed 7 years ago

Commit d7076f01 parent 2e05ea52 files · +13 −46Browse files

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@@ -45,45 +45,6 @@ static int dmam_match(struct device dev, void res, void *match_data) · 44 unmodified lines
45	45	return 0;
46	46	}
47	47
48		−/**
49		− * dmam_alloc_coherent - Managed dma_alloc_coherent()
50		− * @dev: Device to allocate coherent memory for
51		− * @size: Size of allocation
52		− * @dma_handle: Out argument for allocated DMA handle
53		− * @gfp: Allocation flags
54		− *
55		− * Managed dma_alloc_coherent(). Memory allocated using this function
56		− * will be automatically released on driver detach.
57		− *
58		− * RETURNS:
59		− * Pointer to allocated memory on success, NULL on failure.
60		− */
61		−void dmam_alloc_coherent(struct device dev, size_t size,
62		− dma_addr_t *dma_handle, gfp_t gfp)
63		−{
64		− struct dma_devres *dr;
65		− void *vaddr;
66		−
67		− dr = devres_alloc(dmam_release, sizeof(*dr), gfp);
68		− if (!dr)
69		− return NULL;
70		−
71		− vaddr = dma_alloc_coherent(dev, size, dma_handle, gfp);
72		− if (!vaddr) {
73		− devres_free(dr);
74		− return NULL;
75		− }
76		−
77		− dr->vaddr = vaddr;
78		− dr->dma_handle = *dma_handle;
79		− dr->size = size;
80		−
81		− devres_add(dev, dr);
82		−
83		− return vaddr;
84		−}
85		−EXPORT_SYMBOL(dmam_alloc_coherent);
86		−
87	48	/**
88	49	* dmam_free_coherent - Managed dma_free_coherent()
89	50	* @dev: Device to free coherent memory for