From patchwork Mon Sep 28 04:09:40 2020 Content-Type: text/plain; charset="utf-8" MIME-Version: 1.0 Content-Transfer-Encoding: 7bit X-Patchwork-Submitter: Manivannan Sadhasivam X-Patchwork-Id: 11802807 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 3E444139A for ; Mon, 28 Sep 2020 04:11:15 +0000 (UTC) Received: from vger.kernel.org (vger.kernel.org [23.128.96.18]) by mail.kernel.org (Postfix) with ESMTP id 2319423998 for ; Mon, 28 Sep 2020 04:11:15 +0000 (UTC) Authentication-Results: mail.kernel.org; dkim=pass (2048-bit key) header.d=linaro.org header.i=@linaro.org header.b="wHCNDEXc" Received: (majordomo@vger.kernel.org) by vger.kernel.org via listexpand id S1726737AbgI1ELO (ORCPT ); Mon, 28 Sep 2020 00:11:14 -0400 Received: from lindbergh.monkeyblade.net ([23.128.96.19]:57496 "EHLO lindbergh.monkeyblade.net" rhost-flags-OK-OK-OK-OK) by vger.kernel.org with ESMTP id S1726632AbgI1ELM (ORCPT ); Mon, 28 Sep 2020 00:11:12 -0400 Received: from mail-pj1-x1042.google.com (mail-pj1-x1042.google.com [IPv6:2607:f8b0:4864:20::1042]) by lindbergh.monkeyblade.net (Postfix) with ESMTPS id DB8F0C0613CF for ; Sun, 27 Sep 2020 21:11:11 -0700 (PDT) Received: by mail-pj1-x1042.google.com with SMTP id u3so2782198pjr.3 for ; Sun, 27 Sep 2020 21:11:11 -0700 (PDT) DKIM-Signature: v=1; a=rsa-sha256; c=relaxed/relaxed; d=linaro.org; s=google; h=from:to:cc:subject:date:message-id:in-reply-to:references; bh=s8QQquLL4oGKh6uhiaB6MoxZtKFnQbbrDA+3b3PoVuU=; b=wHCNDEXc26IQgoaQXav00ZFDq34qWtVx/rMNeAqTVCeEQn1jDIcUkssuKyMSFb8wo4 GZZRpP8R3cHqKa/q2KYfUViMTiKKMUv9ZJK4Nl6H21T7kxlVs8ttkwScVYayrODPge4Y dEqx5z7JKjxt74LTIEDXRN8M7JQZTU4GtEGB/36bTgx8AypwrYQTZHgu/z2aBbYHyqHE U/4A56vQo2uvOkXY+nEimuOvffYXp5uCP8+CVO86+72i2SEHCsB+OrhLmTONM6nLlgpv wD6REPCmvirZur2bejFhNC1ZDjzVdKQszHT0gS6I1zpERM6BSWKV2lyKe/ykVjAvYFF0 tksA== X-Google-DKIM-Signature: v=1; a=rsa-sha256; c=relaxed/relaxed; d=1e100.net; s=20161025; h=x-gm-message-state:from:to:cc:subject:date:message-id:in-reply-to :references; bh=s8QQquLL4oGKh6uhiaB6MoxZtKFnQbbrDA+3b3PoVuU=; b=mo0jKVTKPbza8bEH9A6PImuwYNQHf07d1WA+eDrw9vNRKAZ1o1AerLv7UL8dYYLhr1 F9Mjq/8Zfhcw1dLygk7NZSF/xaKi2p+eSl5L4RyY515PGouw/DrIdWwAbthgREV4q3nM +JVdB988eo1fdIHVo0cntWuIo4N2gehSbu74qnz7YLrKSJ1oTgCVuGr4Zk5j46o3BlzJ our07dRzw2xOnxoIK/cSY60R9naFz/jS6Ya70sTQxT8AEmx6GyEaq3aOtOp0tP4dRag5 VL5n7AHeCkWa0e9ZGnYZVqclBJwnhrvbQ6tUueCiVG6T4qBNAoPrpfcjpP3NPoaVbSxk Ef9A== X-Gm-Message-State: AOAM531XjH8akG+RFkvrapMjX6r4Aghe9O2Tlf7Cpw6uBtlCFnOuSMsX rMKsRGT+7kD+Ko492NrrnWXI X-Google-Smtp-Source: ABdhPJyLIm54o21Pm7IrO14eOqYhVc2i0HrUBOlquw1kD5bFIE3B3HsVxXDQe/GnwqNf7FM6T+1Ugg== X-Received: by 2002:a17:90b:693:: with SMTP id m19mr7496580pjz.111.1601266271389; Sun, 27 Sep 2020 21:11:11 -0700 (PDT) Received: from Mani-XPS-13-9360.localdomain ([2409:4072:6003:40df:7c40:5a87:eb86:87b0]) by smtp.gmail.com with ESMTPSA id n21sm8306322pgl.7.2020.09.27.21.11.07 (version=TLS1_3 cipher=TLS_AES_256_GCM_SHA384 bits=256/256); Sun, 27 Sep 2020 21:11:10 -0700 (PDT) From: Manivannan Sadhasivam To: gregkh@linuxfoundation.org Cc: hemantk@codeaurora.org, bbhatt@codeaurora.org, linux-arm-msm@vger.kernel.org, jhugo@codeaurora.org, linux-kernel@vger.kernel.org, Manivannan Sadhasivam Subject: [PATCH v2 10/21] bus: mhi: core: Introduce APIs to allocate and free the MHI controller Date: Mon, 28 Sep 2020 09:39:40 +0530 Message-Id: <20200928040951.18207-11-manivannan.sadhasivam@linaro.org> X-Mailer: git-send-email 2.17.1 In-Reply-To: <20200928040951.18207-1-manivannan.sadhasivam@linaro.org> References: <20200928040951.18207-1-manivannan.sadhasivam@linaro.org> Precedence: bulk List-ID: X-Mailing-List: linux-arm-msm@vger.kernel.org From: Bhaumik Bhatt Client devices should use the APIs provided to allocate and free the MHI controller structure. This will help ensure that the structure is zero-initialized and there are no false positives with respect to reading any values such as the serial number or the OEM PK hash. Suggested-by: Manivannan Sadhasivam Signed-off-by: Bhaumik Bhatt Reviewed-by: Manivannan Sadhasivam Signed-off-by: Manivannan Sadhasivam --- drivers/bus/mhi/core/init.c | 16 ++++++++++++++++ include/linux/mhi.h | 12 ++++++++++++ 2 files changed, 28 insertions(+) diff --git a/drivers/bus/mhi/core/init.c b/drivers/bus/mhi/core/init.c index e2011ec46b92..f69a2f3d039d 100644 --- a/drivers/bus/mhi/core/init.c +++ b/drivers/bus/mhi/core/init.c @@ -954,6 +954,22 @@ void mhi_unregister_controller(struct mhi_controller *mhi_cntrl) } EXPORT_SYMBOL_GPL(mhi_unregister_controller); +struct mhi_controller *mhi_alloc_controller(void) +{ + struct mhi_controller *mhi_cntrl; + + mhi_cntrl = kzalloc(sizeof(*mhi_cntrl), GFP_KERNEL); + + return mhi_cntrl; +} +EXPORT_SYMBOL_GPL(mhi_alloc_controller); + +void mhi_free_controller(struct mhi_controller *mhi_cntrl) +{ + kfree(mhi_cntrl); +} +EXPORT_SYMBOL_GPL(mhi_free_controller); + int mhi_prepare_for_power_up(struct mhi_controller *mhi_cntrl) { struct device *dev = &mhi_cntrl->mhi_dev->dev; diff --git a/include/linux/mhi.h b/include/linux/mhi.h index 0c97f4bc5fae..6b987e8cc438 100644 --- a/include/linux/mhi.h +++ b/include/linux/mhi.h @@ -527,6 +527,18 @@ struct mhi_driver { #define to_mhi_driver(drv) container_of(drv, struct mhi_driver, driver) #define to_mhi_device(dev) container_of(dev, struct mhi_device, dev) +/** + * mhi_alloc_controller - Allocate the MHI Controller structure + * Allocate the mhi_controller structure using zero initialized memory + */ +struct mhi_controller *mhi_alloc_controller(void); + +/** + * mhi_free_controller - Free the MHI Controller structure + * Free the mhi_controller structure which was previously allocated + */ +void mhi_free_controller(struct mhi_controller *mhi_cntrl); + /** * mhi_register_controller - Register MHI controller * @mhi_cntrl: MHI controller to register