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Commit 302a1bee authored by Will Thomas's avatar Will Thomas Committed by Herbert Xu
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crypto: img-hash - Reconfigure DMA Burst length 



Burst length of 16 drives the hash accelerator out of spec
and causes stability issues in some cases. Reduce this to
stop data being lost.

Signed-off-by: default avatarWill Thomas <will.thomas@imgtec.com>
Reviewed-by: default avatarJames Hartley <james.hartley@imgtec.com>
Signed-off-by: default avatarHerbert Xu <herbert@gondor.apana.org.au>
parent dd4f677b

drivers/crypto/img-hash.c

+2 −1
Original line number Diff line number Diff line
@@ -71,6 +71,7 @@ 
#define DRIVER_FLAGS_MD5		BIT(21)



#define IMG_HASH_QUEUE_LENGTH		20

#define IMG_HASH_DMA_BURST		4

#define IMG_HASH_DMA_THRESHOLD		64



#ifdef __LITTLE_ENDIAN
@@ -342,7 +343,7 @@ static int img_hash_dma_init(struct img_hash_dev *hdev) 
	dma_conf.direction = DMA_MEM_TO_DEV;

	dma_conf.dst_addr = hdev->bus_addr;

	dma_conf.dst_addr_width = DMA_SLAVE_BUSWIDTH_4_BYTES;

	dma_conf.dst_maxburst = 16;

	dma_conf.dst_maxburst = IMG_HASH_DMA_BURST;

	dma_conf.device_fc = false;



	err = dmaengine_slave_config(hdev->dma_lch,  &dma_conf);