Initialize data_index where appropriate to improve readability and
assist debugging. This change doesn't affect driver behaviour.
I prefer to see
current_req->data[data_index++]
in place of
current_req->data[0]
or
current_req->data[1]
inasmuchas it becomes obvious what the data_index variable does.
Moreover, the actual value of data_index when examined at any given moment
tells me something about prior events, which did prove helpful.
Tested-by: Stan Johnson <userm57@xxxxxxxxx>
Signed-off-by: Finn Thain <fthain@xxxxxxxxxxxxxxxxxxx>
---
drivers/macintosh/via-cuda.c | 6 +++---
1 file changed, 3 insertions(+), 3 deletions(-)
diff --git a/drivers/macintosh/via-cuda.c b/drivers/macintosh/via-cuda.c
index b801c67..f1b2c5b 100644
--- a/drivers/macintosh/via-cuda.c
+++ b/drivers/macintosh/via-cuda.c
@@ -446,12 +446,13 @@ cuda_start(void)
/* assert cuda_state == idle */
if (current_req == NULL)
return;
+ data_index = 0;
if (TREQ_asserted(in_8(&via[B])))
return; /* a byte is coming in from the CUDA */
/* set the shift register to shift out and send a byte */
out_8(&via[ACR], in_8(&via[ACR]) | SR_OUT);
- out_8(&via[SR], current_req->data[0]);
+ out_8(&via[SR], current_req->data[data_index++]);
assert_TIP();
cuda_state = sent_first_byte;
}
@@ -524,9 +525,8 @@ cuda_interrupt(int irq, void *arg)
negate_TIP_and_TACK();
cuda_state = idle;
} else {
- out_8(&via[SR], current_req->data[1]);
+ out_8(&via[SR], current_req->data[data_index++]);
toggle_TACK();
- data_index = 2;
cuda_state = sending;
}
break;
--
2.7.3
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