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crypto: atmel-tdes - use separate DMA scatterlists

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Use two separate input and output scatterlists instead of an array.

Also use DMA_SLAVE_BUSWIDTH_4_BYTES directly and drop the now-unused
addr_width variable.

Signed-off-by: Thorsten Blum <blum@kernel.org>
Signed-off-by: Herbert Xu <herbert@gondor.apana.org.au>
This commit is contained in:
Thorsten Blum 2026-10-11 15:15:56 +02:00 committed by Herbert Xu
parent fed9c1930e
commit c577e8d887
1 changed files with 14 additions and 19 deletions
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33
drivers/crypto/atmel-tdes.c
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@ -372,37 +372,32 @@ static int atmel_tdes_crypt_dma(struct atmel_tdes_dev *dd,
dma_addr_t dma_addr_in,
dma_addr_t dma_addr_out)
{
struct scatterlist sg[2];
struct dma_async_tx_descriptor *in_desc, *out_desc;
enum dma_slave_buswidth addr_width;
struct scatterlist sg_in, sg_out;
struct dma_async_tx_descriptor *in_desc, *out_desc;
addr_width = DMA_SLAVE_BUSWIDTH_4_BYTES;
dd->dma_lch_in.dma_conf.dst_addr_width = addr_width;
dd->dma_lch_out.dma_conf.src_addr_width = addr_width;
dd->dma_lch_in.dma_conf.dst_addr_width = DMA_SLAVE_BUSWIDTH_4_BYTES;
dd->dma_lch_out.dma_conf.src_addr_width = DMA_SLAVE_BUSWIDTH_4_BYTES;
dmaengine_slave_config(dd->dma_lch_in.chan, &dd->dma_lch_in.dma_conf);
dmaengine_slave_config(dd->dma_lch_out.chan, &dd->dma_lch_out.dma_conf);
dd->flags |= TDES_FLAGS_DMA;
sg_init_table(&sg[0], 1);
sg_dma_address(&sg[0]) = dma_addr_in;
sg_dma_len(&sg[0]) = dd->dma_size;
sg_init_table(&sg_in, 1);
sg_dma_address(&sg_in) = dma_addr_in;
sg_dma_len(&sg_in) = dd->dma_size;
sg_init_table(&sg[1], 1);
sg_dma_address(&sg[1]) = dma_addr_out;
sg_dma_len(&sg[1]) = dd->dma_size;
sg_init_table(&sg_out, 1);
sg_dma_address(&sg_out) = dma_addr_out;
sg_dma_len(&sg_out) = dd->dma_size;
in_desc = dmaengine_prep_slave_sg(dd->dma_lch_in.chan, &sg[0],
1, DMA_MEM_TO_DEV,
DMA_PREP_INTERRUPT | DMA_CTRL_ACK);
in_desc = dmaengine_prep_slave_sg(dd->dma_lch_in.chan, &sg_in, 1, DMA_MEM_TO_DEV,
DMA_PREP_INTERRUPT | DMA_CTRL_ACK);
if (!in_desc)
return -EINVAL;
out_desc = dmaengine_prep_slave_sg(dd->dma_lch_out.chan, &sg[1],
1, DMA_DEV_TO_MEM,
DMA_PREP_INTERRUPT | DMA_CTRL_ACK);
out_desc = dmaengine_prep_slave_sg(dd->dma_lch_out.chan, &sg_out, 1, DMA_DEV_TO_MEM,
DMA_PREP_INTERRUPT | DMA_CTRL_ACK);
if (!out_desc)
return -EINVAL;