Return-Path: Received: (majordomo@vger.kernel.org) by vger.kernel.org via listexpand id S1757252Ab3HARlD (ORCPT ); Thu, 1 Aug 2013 13:41:03 -0400 Received: from eusmtp01.atmel.com ([212.144.249.242]:47386 "EHLO eusmtp01.atmel.com" rhost-flags-OK-OK-OK-OK) by vger.kernel.org with ESMTP id S1757010Ab3HARk2 (ORCPT ); Thu, 1 Aug 2013 13:40:28 -0400 From: Rupesh Gujare To: CC: , , Subject: [PATCH 4/6] staging: ozwpan: Drop oldest ISOC frame instead of dropping latest. Date: Thu, 1 Aug 2013 18:40:03 +0100 Message-ID: <1375378806-17948-5-git-send-email-rupesh.gujare@atmel.com> X-Mailer: git-send-email 1.7.9.5 In-Reply-To: <1375378806-17948-1-git-send-email-rupesh.gujare@atmel.com> References: <1375378806-17948-1-git-send-email-rupesh.gujare@atmel.com> MIME-Version: 1.0 Content-Type: text/plain X-Originating-IP: [10.161.30.18] Sender: linux-kernel-owner@vger.kernel.org List-ID: X-Mailing-List: linux-kernel@vger.kernel.org Content-Length: 1437 Lines: 43 In case of ISOC transfer, if TX queue is full then we start dropping latest frame, instead we should drop oldest frame & add latest frame to TX queue. Signed-off-by: Rupesh Gujare --- drivers/staging/ozwpan/ozpd.c | 13 ++++++++++++- 1 file changed, 12 insertions(+), 1 deletion(-) diff --git a/drivers/staging/ozwpan/ozpd.c b/drivers/staging/ozwpan/ozpd.c index 86876bd..17fd7b2 100644 --- a/drivers/staging/ozwpan/ozpd.c +++ b/drivers/staging/ozwpan/ozpd.c @@ -844,9 +844,20 @@ int oz_send_isoc_unit(struct oz_pd *pd, u8 ep_num, const u8 *data, int len) struct oz_tx_frame *isoc_unit = NULL; int nb = pd->nb_queued_isoc_frames; if (nb >= pd->isoc_latency) { + struct list_head *e; + struct oz_tx_frame *f; oz_dbg(TX_FRAMES, "Dropping ISOC Unit nb= %d\n", nb); - goto out; + spin_lock(&pd->tx_frame_lock); + list_for_each(e, &pd->tx_queue) { + f = container_of(e, struct oz_tx_frame, + link); + if (f->skb != NULL) { + oz_tx_isoc_free(pd, f); + break; + } + } + spin_unlock(&pd->tx_frame_lock); } isoc_unit = oz_tx_frame_alloc(pd); if (isoc_unit == NULL) -- 1.7.9.5 -- To unsubscribe from this list: send the line "unsubscribe linux-kernel" in the body of a message to majordomo@vger.kernel.org More majordomo info at http://vger.kernel.org/majordomo-info.html Please read the FAQ at http://www.tux.org/lkml/