diff options
| author | Robin Murphy <robin.murphy@arm.com> | 2018-01-10 15:15:43 +0000 |
|---|---|---|
| committer | Herbert Xu <herbert@gondor.apana.org.au> | 2018-01-18 22:52:27 +1100 |
| commit | 37d728f76c41ab819a9fd31d701de55102559484 (patch) | |
| tree | f3c42d9ecdb6f34819da5b3793cd95dd7e4677f1 /drivers/crypto | |
| parent | 2273f42df1a52bb3aa827163e285528afbf7616c (diff) | |
| download | linux-37d728f76c41ab819a9fd31d701de55102559484.tar.bz2 | |
crypto: marvell/cesa - Fix DMA API misuse
phys_to_dma() is an internal helper for certain DMA API implementations,
and is not appropriate for drivers to use. It appears that what the CESA
driver really wants to be using is dma_map_resource() - admittedly that
didn't exist when the offending code was first merged, but it does now.
Signed-off-by: Robin Murphy <robin.murphy@arm.com>
Acked-by: Boris Brezillon <boris.brezillon@free-electrons.com>
Signed-off-by: Herbert Xu <herbert@gondor.apana.org.au>
Diffstat (limited to 'drivers/crypto')
| -rw-r--r-- | drivers/crypto/marvell/cesa.c | 19 |
1 files changed, 12 insertions, 7 deletions
diff --git a/drivers/crypto/marvell/cesa.c b/drivers/crypto/marvell/cesa.c index 293832488cc9..f81fa4a3e66b 100644 --- a/drivers/crypto/marvell/cesa.c +++ b/drivers/crypto/marvell/cesa.c @@ -15,6 +15,7 @@ */ #include <linux/delay.h> +#include <linux/dma-mapping.h> #include <linux/genalloc.h> #include <linux/interrupt.h> #include <linux/io.h> @@ -409,8 +410,11 @@ static int mv_cesa_get_sram(struct platform_device *pdev, int idx) if (IS_ERR(engine->sram)) return PTR_ERR(engine->sram); - engine->sram_dma = phys_to_dma(cesa->dev, - (phys_addr_t)res->start); + engine->sram_dma = dma_map_resource(cesa->dev, res->start, + cesa->sram_size, + DMA_BIDIRECTIONAL, 0); + if (dma_mapping_error(cesa->dev, engine->sram_dma)) + return -ENOMEM; return 0; } @@ -420,11 +424,12 @@ static void mv_cesa_put_sram(struct platform_device *pdev, int idx) struct mv_cesa_dev *cesa = platform_get_drvdata(pdev); struct mv_cesa_engine *engine = &cesa->engines[idx]; - if (!engine->pool) - return; - - gen_pool_free(engine->pool, (unsigned long)engine->sram, - cesa->sram_size); + if (engine->pool) + gen_pool_free(engine->pool, (unsigned long)engine->sram, + cesa->sram_size); + else + dma_unmap_resource(cesa->dev, engine->sram_dma, + cesa->sram_size, DMA_BIDIRECTIONAL, 0); } static int mv_cesa_probe(struct platform_device *pdev) |