From b439044b70e4b7992f82974eb77d92c95da5960f Mon Sep 17 00:00:00 2001 From: Julian Wiedmann Date: Wed, 25 Mar 2020 10:34:59 +0100 Subject: s390/qeth: remove redundant if-clause in RX poll code Whenever all completed RX buffers have been processed (ie. rx->b_count == 0), we call down to the HW layer to scan for additional buffers. If no further buffers are available, the code breaks out of the while-loop. So we never reach the 'process an RX buffer' step with rx->b_count == 0, eliminate that check and one level of indentation. Signed-off-by: Julian Wiedmann Signed-off-by: David S. Miller --- drivers/s390/net/qeth_core_main.c | 56 ++++++++++++++++++--------------------- 1 file changed, 26 insertions(+), 30 deletions(-) (limited to 'drivers') diff --git a/drivers/s390/net/qeth_core_main.c b/drivers/s390/net/qeth_core_main.c index 7c98bc9e2c9a..13facf2d602b 100644 --- a/drivers/s390/net/qeth_core_main.c +++ b/drivers/s390/net/qeth_core_main.c @@ -5536,6 +5536,10 @@ static unsigned int qeth_rx_poll(struct qeth_card *card, int budget) unsigned int work_done = 0; while (budget > 0) { + struct qeth_qdio_buffer *buffer; + unsigned int skbs_done = 0; + bool done = false; + /* Fetch completed RX buffers: */ if (!card->rx.b_count) { card->rx.qdio_err = 0; @@ -5549,36 +5553,28 @@ static unsigned int qeth_rx_poll(struct qeth_card *card, int budget) } /* Process one completed RX buffer: */ - if (card->rx.b_count) { - struct qeth_qdio_buffer *buffer; - unsigned int skbs_done = 0; - bool done = false; - - buffer = &card->qdio.in_q->bufs[card->rx.b_index]; - if (!(card->rx.qdio_err && - qeth_check_qdio_errors(card, buffer->buffer, - card->rx.qdio_err, "qinerr"))) - skbs_done = qeth_extract_skbs(card, budget, - buffer, &done); - else - done = true; - - work_done += skbs_done; - budget -= skbs_done; - - if (done) { - QETH_CARD_STAT_INC(card, rx_bufs); - qeth_put_buffer_pool_entry(card, - buffer->pool_entry); - qeth_queue_input_buffer(card, card->rx.b_index); - card->rx.b_count--; - - /* Step forward to next buffer: */ - card->rx.b_index = - QDIO_BUFNR(card->rx.b_index + 1); - card->rx.buf_element = 0; - card->rx.e_offset = 0; - } + buffer = &card->qdio.in_q->bufs[card->rx.b_index]; + if (!(card->rx.qdio_err && + qeth_check_qdio_errors(card, buffer->buffer, + card->rx.qdio_err, "qinerr"))) + skbs_done = qeth_extract_skbs(card, budget, buffer, + &done); + else + done = true; + + work_done += skbs_done; + budget -= skbs_done; + + if (done) { + QETH_CARD_STAT_INC(card, rx_bufs); + qeth_put_buffer_pool_entry(card, buffer->pool_entry); + qeth_queue_input_buffer(card, card->rx.b_index); + card->rx.b_count--; + + /* Step forward to next buffer: */ + card->rx.b_index = QDIO_BUFNR(card->rx.b_index + 1); + card->rx.buf_element = 0; + card->rx.e_offset = 0; } } -- cgit v1.2.3