From: Amitkumar Karwar Date: Tue, 25 Nov 2014 14:43:04 +0000 (-0800) Subject: mwifiex: skip delay main work logic for USB interface. X-Git-Url: https://git.karo-electronics.de/?a=commitdiff_plain;h=381e9fffe6b8343c2479939178ef7ded50bf32d3;p=linux-beck.git mwifiex: skip delay main work logic for USB interface. We had introduced delay main work logic to avoid processing interrupts when Rx pending packet count reaches high threshold. interrupt processing is restarted later when packet count reduces lower threashold. This helped to reduce unnecessary overhead and improve throughput for SD and PCIe chipsets. As there are no interrupts for USB, we will skip this logic for USB chipsets. Signed-off-by: Cathy Luo Signed-off-by: Avinash Patil Signed-off-by: Amitkumar Karwar Signed-off-by: John W. Linville --- diff --git a/drivers/net/wireless/mwifiex/main.c b/drivers/net/wireless/mwifiex/main.c index 0e50120eb807..cf07279bf602 100644 --- a/drivers/net/wireless/mwifiex/main.c +++ b/drivers/net/wireless/mwifiex/main.c @@ -149,7 +149,8 @@ static int mwifiex_process_rx(struct mwifiex_adapter *adapter) /* Check for Rx data */ while ((skb = skb_dequeue(&adapter->rx_data_q))) { atomic_dec(&adapter->rx_pending); - if (adapter->delay_main_work && + if ((adapter->delay_main_work || + adapter->iface_type == MWIFIEX_USB) && (atomic_read(&adapter->rx_pending) < LOW_RX_PENDING)) { if (adapter->if_ops.submit_rem_rx_urbs) adapter->if_ops.submit_rem_rx_urbs(adapter); @@ -202,12 +203,15 @@ process_start: (adapter->hw_status == MWIFIEX_HW_STATUS_NOT_READY)) break; - /* If we process interrupts first, it would increase RX pending - * even further. Avoid this by checking if rx_pending has - * crossed high threshold and schedule rx work queue - * and then process interrupts + /* For non-USB interfaces, If we process interrupts first, it + * would increase RX pending even further. Avoid this by + * checking if rx_pending has crossed high threshold and + * schedule rx work queue and then process interrupts. + * For USB interface, there are no interrupts. We already have + * HIGH_RX_PENDING check in usb.c */ - if (atomic_read(&adapter->rx_pending) >= HIGH_RX_PENDING) { + if (atomic_read(&adapter->rx_pending) >= HIGH_RX_PENDING && + adapter->iface_type != MWIFIEX_USB) { adapter->delay_main_work = true; if (!adapter->rx_processing) queue_work(adapter->rx_workqueue,