From 97ced1aac07e7b5348a560512b287af69f863917 Mon Sep 17 00:00:00 2001 From: Finn Thain Date: Sat, 31 Dec 2016 19:56:26 -0500 Subject: [PATCH] via-cuda: Initialize data_index early and increment consistently 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 Signed-off-by: Finn Thain Signed-off-by: Michael Ellerman --- 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 e3763cb4184b..57fb20dcb9dd 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; -- 2.20.1