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| author | Will Thomas <will.thomas@imgtec.com> | 2016-08-05 15:00:16 +0200 |
|---|---|---|
| committer | Herbert Xu <herbert@gondor.apana.org.au> | 2016-08-09 12:47:20 +0200 |
| commit | 302a1bee8fd71b01bcf4ca8395c115a60cef52bf (patch) | |
| tree | fdfff239871aee1b3a31524ef1170b4e11d02b57 /drivers/crypto/img-hash.c | |
| parent | crypto: img-hash - Fix hash request context (diff) | |
| download | linux-302a1bee8fd71b01bcf4ca8395c115a60cef52bf.tar.xz linux-302a1bee8fd71b01bcf4ca8395c115a60cef52bf.zip | |
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: Will Thomas <will.thomas@imgtec.com>
Reviewed-by: James Hartley <james.hartley@imgtec.com>
Signed-off-by: Herbert Xu <herbert@gondor.apana.org.au>
Diffstat (limited to 'drivers/crypto/img-hash.c')
| -rw-r--r-- | drivers/crypto/img-hash.c | 3 |
1 files changed, 2 insertions, 1 deletions
diff --git a/drivers/crypto/img-hash.c b/drivers/crypto/img-hash.c index de2b86efbfe4..f8abbe3bc51c 100644 --- a/drivers/crypto/img-hash.c +++ b/drivers/crypto/img-hash.c @@ -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); |