spi: mxs: add tracing to custom .transfer_one_message callback

Driver specific implementations for .transfer_one_message need to call
the tracing stuff themself. This is necessary to make spi tracing
actually useful.

Signed-off-by: Uwe Kleine-König <[e-mail]>
Signed-off-by: Mark Brown <[e-mail]>

drivers/spi/spi-mxs.c

···
 #include <linux/stmp_device.h>
 #include <linux/spi/spi.h>
 #include <linux/spi/mxs-spi.h>
+#include <trace/events/spi.h>
 
 #define DRIVER_NAME		"mxs-spi"
 
···
 
 	list_for_each_entry(t, &m->transfers, transfer_list) {
 
+		trace_spi_transfer_start(m, t);
+
 		status = mxs_spi_setup_transfer(m->spi, t);
 		if (status)
 			break;
···
 						t->rx_buf, t->len,
 						flag);
 		}
+
+		trace_spi_transfer_stop(m, t);
 
 		if (status) {
 			stmp_reset_block(ssp->base);