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crypto: atmel-tdes - fix DMA sync direction

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Before DMA output is consumed by the CPU, ->dma_addr_out must be synced
with dma_sync_single_for_cpu() instead of dma_sync_single_for_device().
Using the wrong direction can return stale cache data on non-coherent
platforms.

Fixes: 13802005d8 ("crypto: atmel - add Atmel DES/TDES driver")
Fixes: 1f858040c2 ("crypto: atmel-tdes - add support for latest release of the IP (0x700)")
Cc: stable@vger.kernel.org
Signed-off-by: Thorsten Blum <thorsten.blum@linux.dev>
Signed-off-by: Herbert Xu <herbert@gondor.apana.org.au>
This commit is contained in:
Thorsten Blum 2026-03-07 16:31:10 +01:00 committed by Herbert Xu
parent 5377032914
commit c8a9a64753
1 changed files with 4 additions and 4 deletions
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4
drivers/crypto/atmel-tdes.c
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@ -294,7 +294,7 @@ static int atmel_tdes_crypt_pdc_stop(struct atmel_tdes_dev *dd)
dma_unmap_sg(dd->dev, dd->out_sg, 1, DMA_FROM_DEVICE); dma_unmap_sg(dd->dev, dd->out_sg, 1, DMA_FROM_DEVICE);
dma_unmap_sg(dd->dev, dd->in_sg, 1, DMA_TO_DEVICE); dma_unmap_sg(dd->dev, dd->in_sg, 1, DMA_TO_DEVICE);
} else { } else {
dma_sync_single_for_device(dd->dev, dd->dma_addr_out, dma_sync_single_for_cpu(dd->dev, dd->dma_addr_out,
dd->dma_size, DMA_FROM_DEVICE); dd->dma_size, DMA_FROM_DEVICE);
/* copy data */ /* copy data */
@ -619,7 +619,7 @@ static int atmel_tdes_crypt_dma_stop(struct atmel_tdes_dev *dd)
dma_unmap_sg(dd->dev, dd->out_sg, 1, DMA_FROM_DEVICE); dma_unmap_sg(dd->dev, dd->out_sg, 1, DMA_FROM_DEVICE);
dma_unmap_sg(dd->dev, dd->in_sg, 1, DMA_TO_DEVICE); dma_unmap_sg(dd->dev, dd->in_sg, 1, DMA_TO_DEVICE);
} else { } else {
dma_sync_single_for_device(dd->dev, dd->dma_addr_out, dma_sync_single_for_cpu(dd->dev, dd->dma_addr_out,
dd->dma_size, DMA_FROM_DEVICE); dd->dma_size, DMA_FROM_DEVICE);
/* copy data */ /* copy data */