From patchwork Wed Dec 8 08:57:34 2021 Content-Type: text/plain; charset="utf-8" MIME-Version: 1.0 Content-Transfer-Encoding: 7bit X-Patchwork-Submitter: Manivannan Sadhasivam X-Patchwork-Id: 12663915 Return-Path: X-Spam-Checker-Version: SpamAssassin 3.4.0 (2014-02-07) on aws-us-west-2-korg-lkml-1.web.codeaurora.org Received: from vger.kernel.org (vger.kernel.org [23.128.96.18]) by smtp.lore.kernel.org (Postfix) with ESMTP id D85E5C433FE for ; Wed, 8 Dec 2021 08:57:46 +0000 (UTC) Received: (majordomo@vger.kernel.org) by vger.kernel.org via listexpand id S230003AbhLHJBQ (ORCPT ); Wed, 8 Dec 2021 04:01:16 -0500 Received: from lindbergh.monkeyblade.net ([23.128.96.19]:48620 "EHLO lindbergh.monkeyblade.net" rhost-flags-OK-OK-OK-OK) by vger.kernel.org with ESMTP id S229933AbhLHJBQ (ORCPT ); Wed, 8 Dec 2021 04:01:16 -0500 Received: from mail-pg1-x533.google.com (mail-pg1-x533.google.com [IPv6:2607:f8b0:4864:20::533]) by lindbergh.monkeyblade.net (Postfix) with ESMTPS id E2EB7C061746 for ; Wed, 8 Dec 2021 00:57:44 -0800 (PST) Received: by mail-pg1-x533.google.com with SMTP id 137so1516147pgg.3 for ; Wed, 08 Dec 2021 00:57:44 -0800 (PST) DKIM-Signature: v=1; a=rsa-sha256; c=relaxed/relaxed; d=linaro.org; s=google; h=from:to:cc:subject:date:message-id:mime-version :content-transfer-encoding; bh=Me9WYpu3noGP7R3Uc2V4qejvmKsuzQtp6WBHkL6JJ34=; b=a0P8vxp5qFAHEnKHmOGMQT6yYKt1f1YL0XbmxNtTF+S1sW523ENTwTLz4BgOnOyhna VeB1NKquPAcV4H/+yj9n0k90GyAYRgJWdWwxzUyno1sqpgJQrlxJmuxXUbVtJBvpYw71 nEScK1bIAM7crMIJQRvRdhmUxvfNNS/cZzyHGEatuaG+sbDhw6ozH1UMv0m2Hy7C3LnV u6nH1nH9KB/9hhdg1h6oqkZ18n5iaNHiz4Zc5FxAMYvYmSZhwkUmOX5TecD8wMwb6pTD dPf9cf57dsBwutxmr5G3X/8GUsTzhVUuwxNKSSMfMSS0yF41SFLNcG3IUPbpTG4rgakR ba2Q== X-Google-DKIM-Signature: v=1; a=rsa-sha256; c=relaxed/relaxed; d=1e100.net; s=20210112; h=x-gm-message-state:from:to:cc:subject:date:message-id:mime-version :content-transfer-encoding; bh=Me9WYpu3noGP7R3Uc2V4qejvmKsuzQtp6WBHkL6JJ34=; b=XVTmIZNLG6HEyrsetl4IiKl/Jz/GKe82Gkv3nXTmTq55WB0MvWnVsTrkEUv+rU3AMR LtRwvuLlMRe5qaqL1k9rLYyKajy4i8dYSdL7VQ/q6YEaWJAkPkCkyte+3D68I+ag9mPj fNtLs+srY5+wGz07ntWjxPEP93GUKNbDaCOHaRlmg2mXfidUDtSW8UAoqGHZMRJo9+pz K3h6uNQWjJf2B5DEU/mtThon+RnmWzixg3K0gozKRHS32E1/jEi6XKwyjDqUL1XngZJB 4Q6YNtq7u7ycb8b7wQRcLnlIC12GMXlc35515QZgb77rDnChXHX7zL3ngNV1NyrqsGOG WU/g== X-Gm-Message-State: AOAM533xCeqa2grKb+wx3Brxm84iSZxLaJiHhLIPImJDrb6eLgrEBMsr wmj3eJTRtErDtEZfpuZrECkN X-Google-Smtp-Source: ABdhPJzVkFfiD7oa8U3/B1Kv9DliwmeX3DMinwAptexT8/Vy4Y1y05AK4GkZo3aV3yxvCEC0A05hzw== X-Received: by 2002:a62:82c1:0:b0:4ae:db0e:bae1 with SMTP id w184-20020a6282c1000000b004aedb0ebae1mr4473369pfd.47.1638953864414; Wed, 08 Dec 2021 00:57:44 -0800 (PST) Received: from localhost.localdomain ([117.202.189.59]) by smtp.gmail.com with ESMTPSA id oa17sm2055470pjb.37.2021.12.08.00.57.40 (version=TLS1_3 cipher=TLS_AES_256_GCM_SHA384 bits=256/256); Wed, 08 Dec 2021 00:57:43 -0800 (PST) From: Manivannan Sadhasivam To: gregkh@linuxfoundation.org Cc: mhi@lists.linux.dev, hemantk@codeaurora.org, bbhatt@codeaurora.org, loic.poulain@linaro.org, linux-arm-msm@vger.kernel.org, linux-kernel@vger.kernel.org, ath11k@lists.infradead.org, linux-wireless@vger.kernel.org, kvalo@codeaurora.org, Manivannan Sadhasivam Subject: [PATCH 0/1] MHI fix for v5.16 - Take 2 Date: Wed, 8 Dec 2021 14:27:34 +0530 Message-Id: <20211208085735.196394-1-manivannan.sadhasivam@linaro.org> X-Mailer: git-send-email 2.25.1 MIME-Version: 1.0 Precedence: bulk List-ID: X-Mailing-List: linux-wireless@vger.kernel.org Hi Greg, Here is the final MHI fix for the v5.16 cycle. Kalle reported a regression with ath11k stack due to 020d3b26c07a, and that's been affecting multiple WLAN products like QCA6390 and WCN6855. The regression doesn't let the device to resume from suspend and that has been due to a firmware bug. The device goes to a bad MHI state during suspend and that can be seen in the MHI state during resume. But that doesn't seem to affect the functionality of the device as it continues to work fine if we allow it to resume. Ideally, this should be fixed in the firmware but as like most of the products out in market, getting a firmware fix for this issue not doable. So we have to workaround for it in the MHI stack by allowing it to resume irrespective of the MHI state. Since the fix patch also touches ath11k stack, Kalle has given his Ack so that the patch can be taken via mhi/char-misc tree. Thanks, Mani Loic Poulain (1): bus: mhi: core: Add support for forced PM resume drivers/bus/mhi/core/pm.c | 10 +++++++--- drivers/bus/mhi/pci_generic.c | 2 +- drivers/net/wireless/ath/ath11k/mhi.c | 6 +++++- include/linux/mhi.h | 3 ++- 4 files changed, 15 insertions(+), 6 deletions(-)