From patchwork Mon May 18 20:03:55 2020 Content-Type: text/plain; charset="utf-8" MIME-Version: 1.0 Content-Transfer-Encoding: 7bit X-Patchwork-Submitter: Bhaumik Bhatt X-Patchwork-Id: 11556247 Return-Path: Received: from mail.kernel.org (pdx-korg-mail-1.web.codeaurora.org [172.30.200.123]) by pdx-korg-patchwork-2.web.codeaurora.org (Postfix) with ESMTP id 95824913 for ; Mon, 18 May 2020 20:04:12 +0000 (UTC) Received: from vger.kernel.org (vger.kernel.org [23.128.96.18]) by mail.kernel.org (Postfix) with ESMTP id 7D68820829 for ; Mon, 18 May 2020 20:04:12 +0000 (UTC) Authentication-Results: mail.kernel.org; dkim=fail reason="signature verification failed" (1024-bit key) header.d=mg.codeaurora.org header.i=@mg.codeaurora.org header.b="mSixlheT" Received: (majordomo@vger.kernel.org) by vger.kernel.org via listexpand id S1726643AbgERUEL (ORCPT ); Mon, 18 May 2020 16:04:11 -0400 Received: from mail27.static.mailgun.info ([104.130.122.27]:56393 "EHLO mail27.static.mailgun.info" rhost-flags-OK-OK-OK-OK) by vger.kernel.org with ESMTP id S1726977AbgERUEK (ORCPT ); Mon, 18 May 2020 16:04:10 -0400 DKIM-Signature: a=rsa-sha256; v=1; c=relaxed/relaxed; d=mg.codeaurora.org; q=dns/txt; s=smtp; t=1589832250; h=References: In-Reply-To: Message-Id: Date: Subject: Cc: To: From: Sender; bh=j1u5QBULuJKFUyNxaQAkdzuQVerFj62srXNJ8V0Lrak=; b=mSixlheT/ZnceK4/8Yvu+Lt0uc9yIhMf0hAwudJa9MUTc133Jufj/b2ovvyQyXBRSWKPtASE HkTB9SZ9fCpXXh01yIEutPc7/x4NRcfk32rkqVMGHMfZihdwzqwr579z6LtRmIhBWgaHu1wB bkB5xqsVyuDd3x94KQe85DTa3u0= X-Mailgun-Sending-Ip: 104.130.122.27 X-Mailgun-Sid: WyI1MzIzYiIsICJsaW51eC1hcm0tbXNtQHZnZXIua2VybmVsLm9yZyIsICJiZTllNGEiXQ== Received: from smtp.codeaurora.org (ec2-35-166-182-171.us-west-2.compute.amazonaws.com [35.166.182.171]) by mxa.mailgun.org with ESMTP id 5ec2ea38.7efd1e647110-smtp-out-n02; Mon, 18 May 2020 20:04:08 -0000 (UTC) Received: by smtp.codeaurora.org (Postfix, from userid 1001) id 0B1C6C433D2; Mon, 18 May 2020 20:04:08 +0000 (UTC) X-Spam-Checker-Version: SpamAssassin 3.4.0 (2014-02-07) on aws-us-west-2-caf-mail-1.web.codeaurora.org X-Spam-Level: X-Spam-Status: No, score=-1.0 required=2.0 tests=ALL_TRUSTED,SPF_NONE autolearn=ham autolearn_force=no version=3.4.0 Received: from bbhatt-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: bbhatt) by smtp.codeaurora.org (Postfix) with ESMTPSA id 656E0C433F2; Mon, 18 May 2020 20:04:07 +0000 (UTC) DMARC-Filter: OpenDMARC Filter v1.3.2 smtp.codeaurora.org 656E0C433F2 Authentication-Results: aws-us-west-2-caf-mail-1.web.codeaurora.org; dmarc=none (p=none dis=none) header.from=codeaurora.org Authentication-Results: aws-us-west-2-caf-mail-1.web.codeaurora.org; spf=none smtp.mailfrom=bbhatt@codeaurora.org From: Bhaumik Bhatt To: manivannan.sadhasivam@linaro.org Cc: linux-arm-msm@vger.kernel.org, hemantk@codeaurora.org, jhugo@codeaurora.org, linux-kernel@vger.kernel.org, Bhaumik Bhatt Subject: [PATCH v3 1/7] bus: mhi: core: Abort suspends due to outgoing pending packets Date: Mon, 18 May 2020 13:03:55 -0700 Message-Id: <1589832241-13867-2-git-send-email-bbhatt@codeaurora.org> X-Mailer: git-send-email 1.9.1 In-Reply-To: <1589832241-13867-1-git-send-email-bbhatt@codeaurora.org> References: <1589832241-13867-1-git-send-email-bbhatt@codeaurora.org> Sender: linux-arm-msm-owner@vger.kernel.org Precedence: bulk List-ID: X-Mailing-List: linux-arm-msm@vger.kernel.org Add the missing check to abort suspends if a client has pending outgoing packets to send to the device. This allows better utilization of the MHI bus wherein clients on the host are not left waiting for longer suspend or resume cycles to finish for data transfers. Signed-off-by: Bhaumik Bhatt Reviewed-by: Jeffrey Hugo --- drivers/bus/mhi/core/pm.c | 6 ++++-- 1 file changed, 4 insertions(+), 2 deletions(-) diff --git a/drivers/bus/mhi/core/pm.c b/drivers/bus/mhi/core/pm.c index 7960980..661d704 100644 --- a/drivers/bus/mhi/core/pm.c +++ b/drivers/bus/mhi/core/pm.c @@ -686,7 +686,8 @@ int mhi_pm_suspend(struct mhi_controller *mhi_cntrl) return -EIO; /* Return busy if there are any pending resources */ - if (atomic_read(&mhi_cntrl->dev_wake)) + if (atomic_read(&mhi_cntrl->dev_wake) || + atomic_read(&mhi_cntrl->pending_pkts)) return -EBUSY; /* Take MHI out of M2 state */ @@ -712,7 +713,8 @@ int mhi_pm_suspend(struct mhi_controller *mhi_cntrl) write_lock_irq(&mhi_cntrl->pm_lock); - if (atomic_read(&mhi_cntrl->dev_wake)) { + if (atomic_read(&mhi_cntrl->dev_wake) || + atomic_read(&mhi_cntrl->pending_pkts)) { write_unlock_irq(&mhi_cntrl->pm_lock); return -EBUSY; }