stmhal: Fix hardfault when configured as a SPI slave

8a1a5c23 · Dave Hylands · Damien George · 5e11d2b3 · 8a1a5c23
Commit 8a1a5c23 authored Aug 04, 2015 by Dave Hylands Committed by Damien George Aug 05, 2015
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stmhal/spi.c stmhal/spi.c +3 -1

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--- a/stmhal/spi.c
+++ b/stmhal/spi.c
@@ -546,7 +546,9 @@ STATIC mp_obj_t pyb_spi_recv(mp_uint_t n_args, const mp_obj_t *pos_args, mp_map_
        if (status == HAL_OK) {
            status = spi_wait_dma_finished(self->spi, args[1].u_int);
        }
-        dma_deinit(&tx_dma);
+        if (self->spi->hdmatx != NULL) {
+            dma_deinit(&tx_dma);
+        }
        dma_deinit(&rx_dma);
    }