38         state->channel = (int8_t)dma_claim_unused_channel(false);  in pico_sha256_try_start()
39         if (state->channel < 0) {  in pico_sha256_try_start()
43         state->config = dma_channel_get_default_config(state->channel);  in pico_sha256_try_start()
50         state->channel = -1;  in pico_sha256_try_start()
73     if (state->channel >= 0) {  in write_to_hardware()
74         dma_channel_wait_for_finish_blocking(state->channel);  in write_to_hardware()
78             state->channel,  in write_to_hardware()
143     if (state->channel >= 0) {  in pico_sha256_update_blocking()
144         dma_channel_wait_for_finish_blocking(state->channel);  in pico_sha256_update_blocking()
172         if (state->channel >= 0) {  in pico_sha256_finish()
173             dma_channel_wait_for_finish_blocking(state->channel);  in pico_sha256_finish()
179     if (state->channel >= 0) {  in pico_sha256_finish()
180         dma_channel_cleanup(state->channel);  in pico_sha256_finish()
181         dma_channel_unclaim(state->channel);  in pico_sha256_finish()
182         state->channel  = -1;  in pico_sha256_finish()