From mboxrd@z Thu Jan 1 00:00:00 1970 Return-Path: X-Spam-Checker-Version: SpamAssassin 3.4.0 (2014-02-07) on aws-us-west-2-korg-lkml-1.web.codeaurora.org X-Spam-Level: X-Spam-Status: No, score=-2.6 required=3.0 tests=DKIM_SIGNED, HEADER_FROM_DIFFERENT_DOMAINS,MAILING_LIST_MULTI,SPF_PASS,T_DKIM_INVALID, URIBL_BLOCKED,USER_AGENT_GIT autolearn=ham autolearn_force=no version=3.4.0 Received: from mail.kernel.org (mail.kernel.org [198.145.29.99]) by smtp.lore.kernel.org (Postfix) with ESMTP id 48BD0C43142 for ; Thu, 28 Jun 2018 01:20:31 +0000 (UTC) Received: from vger.kernel.org (vger.kernel.org [209.132.180.67]) by mail.kernel.org (Postfix) with ESMTP id D965824882 for ; Thu, 28 Jun 2018 01:20:30 +0000 (UTC) Authentication-Results: mail.kernel.org; dkim=fail reason="key not found in DNS" (0-bit key) header.d=codeaurora.org header.i=@codeaurora.org header.b="nJbZkH3Z"; dkim=fail reason="key not found in DNS" (0-bit key) header.d=codeaurora.org header.i=@codeaurora.org header.b="nJbZkH3Z" DMARC-Filter: OpenDMARC Filter v1.3.2 mail.kernel.org D965824882 Authentication-Results: mail.kernel.org; dmarc=none (p=none dis=none) header.from=codeaurora.org Authentication-Results: mail.kernel.org; spf=none smtp.mailfrom=linux-kernel-owner@vger.kernel.org Received: (majordomo@vger.kernel.org) by vger.kernel.org via listexpand id S1752702AbeF1BU2 (ORCPT ); Wed, 27 Jun 2018 21:20:28 -0400 Received: from smtp.codeaurora.org ([198.145.29.96]:34138 "EHLO smtp.codeaurora.org" rhost-flags-OK-OK-OK-OK) by vger.kernel.org with ESMTP id S1751172AbeF1BU0 (ORCPT ); Wed, 27 Jun 2018 21:20:26 -0400 Received: by smtp.codeaurora.org (Postfix, from userid 1000) id 41E3460B1E; Thu, 28 Jun 2018 01:20:26 +0000 (UTC) DKIM-Signature: v=1; a=rsa-sha256; c=relaxed/simple; d=codeaurora.org; s=default; t=1530148826; bh=1ae52/X0XZBW+hxISQWqv5aoUmrAd4TFJOUTk7Q9F9A=; h=From:To:Cc:Subject:Date:From; b=nJbZkH3ZKVyXl3YCbEdWPYVht+b3Qf2hHH2R7zfr0fPzGv/w0dswamHdQnRBcLvXX BUNiFlI6/VWcck95pCcUGMcnhwjG415ssEjGXjndS5nO25kpfRVHio9UANw/em1X/L TaZShnbRzmF6tmxyW//TPSM/f/Q03qo3fV4rfIvE= Received: from clew-linux.qualcomm.com (i-global254.qualcomm.com [199.106.103.254]) (using TLSv1.2 with cipher ECDHE-RSA-AES128-SHA256 (128/128 bits)) (No client certificate requested) (Authenticated sender: clew@smtp.codeaurora.org) by smtp.codeaurora.org (Postfix) with ESMTPSA id DA23F6071C; Thu, 28 Jun 2018 01:20:15 +0000 (UTC) DKIM-Signature: v=1; a=rsa-sha256; c=relaxed/simple; d=codeaurora.org; s=default; t=1530148826; bh=1ae52/X0XZBW+hxISQWqv5aoUmrAd4TFJOUTk7Q9F9A=; h=From:To:Cc:Subject:Date:From; b=nJbZkH3ZKVyXl3YCbEdWPYVht+b3Qf2hHH2R7zfr0fPzGv/w0dswamHdQnRBcLvXX BUNiFlI6/VWcck95pCcUGMcnhwjG415ssEjGXjndS5nO25kpfRVHio9UANw/em1X/L TaZShnbRzmF6tmxyW//TPSM/f/Q03qo3fV4rfIvE= DMARC-Filter: OpenDMARC Filter v1.3.2 smtp.codeaurora.org DA23F6071C Authentication-Results: pdx-caf-mail.web.codeaurora.org; dmarc=none (p=none dis=none) header.from=codeaurora.org Authentication-Results: pdx-caf-mail.web.codeaurora.org; spf=none smtp.mailfrom=clew@codeaurora.org From: Chris Lew To: bjorn.andersson@linaro.org, andy.gross@linaro.org, david.brown@linaro.org Cc: aneela@codeaurora.org, linux-arm-msm@vger.kernel.org, linux-soc@vger.kernel.org, linux-kernel@vger.kernel.org, clew@codeaurora.org Subject: [PATCH] rpmsg: glink: Set tail pointer to 0 at end of FIFO Date: Wed, 27 Jun 2018 18:19:57 -0700 Message-Id: <1530148797-31904-1-git-send-email-clew@codeaurora.org> X-Mailer: git-send-email 1.9.1 Sender: linux-kernel-owner@vger.kernel.org Precedence: bulk List-ID: X-Mailing-List: linux-kernel@vger.kernel.org When wrapping around the FIFO, the remote expects the tail pointer to be reset to 0 on the edge case where the tail equals the FIFO length. Signed-off-by: Chris Lew --- drivers/rpmsg/qcom_glink_smem.c | 2 +- 1 file changed, 1 insertion(+), 1 deletion(-) diff --git a/drivers/rpmsg/qcom_glink_smem.c b/drivers/rpmsg/qcom_glink_smem.c index 2b5cf2790954..7a276be598d6 100644 --- a/drivers/rpmsg/qcom_glink_smem.c +++ b/drivers/rpmsg/qcom_glink_smem.c @@ -109,7 +109,7 @@ static void glink_smem_rx_advance(struct qcom_glink_pipe *np, tail = le32_to_cpu(*pipe->tail); tail += count; - if (tail > pipe->native.length) + if (tail >= pipe->native.length) tail -= pipe->native.length; *pipe->tail = cpu_to_le32(tail); -- The Qualcomm Innovation Center, Inc. is a member of the Code Aurora Forum, a Linux Foundation Collaborative Project