65 	unsigned int todo;  in sun8i_ss_prng_generate()  local
83 	todo = dlen + PRNG_SEED_SIZE + PRNG_DATA_SIZE;  in sun8i_ss_prng_generate()
84 	todo -= todo % PRNG_DATA_SIZE;  in sun8i_ss_prng_generate()
86 	d = kzalloc(todo, GFP_KERNEL | GFP_DMA);  in sun8i_ss_prng_generate()
94 	algt->stat_bytes += todo;  in sun8i_ss_prng_generate()
110 	dma_dst = dma_map_single(ss->dev, d, todo, DMA_FROM_DEVICE);  in sun8i_ss_prng_generate()
129 	writel(todo / 4, ss->base + SS_LEN_ADR_REG);  in sun8i_ss_prng_generate()
139 						  msecs_to_jiffies(todo));  in sun8i_ss_prng_generate()
141 		dev_err(ss->dev, "DMA timeout for PRNG (size=%u)\n", todo);  in sun8i_ss_prng_generate()
161 	dma_unmap_single(ss->dev, dma_dst, todo, DMA_FROM_DEVICE);  in sun8i_ss_prng_generate()
170 	memzero_explicit(d, todo);  in sun8i_ss_prng_generate()