From patchwork Fri Sep 2 15:48:56 2022 Content-Type: text/plain; charset="utf-8" MIME-Version: 1.0 Content-Transfer-Encoding: 7bit X-Patchwork-Submitter: Abel Vesa X-Patchwork-Id: 12964380 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 127D5C6FA86 for ; Fri, 2 Sep 2022 15:56:38 +0000 (UTC) Received: (majordomo@vger.kernel.org) by vger.kernel.org via listexpand id S237670AbiIBP4g (ORCPT ); Fri, 2 Sep 2022 11:56:36 -0400 Received: from lindbergh.monkeyblade.net ([23.128.96.19]:37276 "EHLO lindbergh.monkeyblade.net" rhost-flags-OK-OK-OK-OK) by vger.kernel.org with ESMTP id S237559AbiIBPzT (ORCPT ); Fri, 2 Sep 2022 11:55:19 -0400 Received: from mail-wr1-x42b.google.com (mail-wr1-x42b.google.com [IPv6:2a00:1450:4864:20::42b]) by lindbergh.monkeyblade.net (Postfix) with ESMTPS id 1ECE6C2FB9 for ; Fri, 2 Sep 2022 08:49:31 -0700 (PDT) Received: by mail-wr1-x42b.google.com with SMTP id k9so2891873wri.0 for ; Fri, 02 Sep 2022 08:49:31 -0700 (PDT) DKIM-Signature: v=1; a=rsa-sha256; c=relaxed/relaxed; d=linaro.org; s=google; h=content-transfer-encoding:mime-version:references:in-reply-to :message-id:date:subject:cc:to:from:from:to:cc:subject:date; bh=gH4aJXKyf/IuSJWto9jZ1pfTJBkJztgjhsXCgC7qiLI=; b=YWUCF/R79HSCrrHnS4gnKeNpAvrTcplY00MBLGUZr8K2p59x9jLuarG0+i0lsuQSmR oHdtjNgnj+vjX5HXSAcBJxf8x1GVk/F58ZOgF+R9FCkDZEKJcysekxxiWBy1i75h0Rv+ W5/KV7zy05rTj69s5clAtrKw3Kb+w447vIAs1V/U9GKvOueoBjNmbuC2WTWxPBfxBZIN Y/r/Bay1yYH5uGy3b5bz1v9bHwHdOLChNB8Y7xDZ0fU60PkNIIAyv/44VsaLbGGl7drB Cbfu2h16lC5sCnhDfKOzZ1KVWAIfnBSWSYbR0D+hGptfwlSnVEBcMh+oGIokaYfefwm+ viMA== X-Google-DKIM-Signature: v=1; a=rsa-sha256; c=relaxed/relaxed; d=1e100.net; s=20210112; h=content-transfer-encoding:mime-version:references:in-reply-to :message-id:date:subject:cc:to:from:x-gm-message-state:from:to:cc :subject:date; bh=gH4aJXKyf/IuSJWto9jZ1pfTJBkJztgjhsXCgC7qiLI=; b=AEZd6/daM81ILpv00V31AULjzLAe+4pwamxr/k+vd7KdmGNlE0I7KKJOKKakcnc6Bo +F426lnMcWCDDE4oOByxF0gFqVbz3ZGT5vYUCzkSKSh4zMZj8RuO8HbOO3pNGTgo06T2 gDttoZI/flqJQhcCRos8AEckIsnRqXCzyBn8cwpnEiSER1l/C0nkq9d0kj3qEdwuu6hY AD67LjhoLDp+hbsuB8iHe/AcbEioOWjcVzdmchC2P8M44HifN6WU+lAaRxfnQ9YjG2LJ +/V9L2r6RdCvRVIcnBT1rSUXgPMJe8B+qk8P7OWjUNkWRYPl19+LKN3f0ptmDrFbkgnU antA== X-Gm-Message-State: ACgBeo2W+T3Y7qKy335vV28120kOxZQYYxQCuzDgKBFkdcXUr5xYQHxl IoXe4h9nkaPzIuQf7lfaXtZd6Q== X-Google-Smtp-Source: AA6agR7/b7cwzp9t0Xq6n/L3MnGKEQSdsFL5B2BwqfraG1Mc8/0Rz7lHMk07oIm12KI0AFMnuBd0wA== X-Received: by 2002:a05:6000:1e18:b0:226:e095:a98c with SMTP id bj24-20020a0560001e1800b00226e095a98cmr11464157wrb.235.1662133771251; Fri, 02 Sep 2022 08:49:31 -0700 (PDT) Received: from hackbox.lan ([94.52.112.99]) by smtp.gmail.com with ESMTPSA id b1-20020a05600010c100b002250f9abdefsm2046741wrx.117.2022.09.02.08.49.29 (version=TLS1_3 cipher=TLS_AES_256_GCM_SHA384 bits=256/256); Fri, 02 Sep 2022 08:49:30 -0700 (PDT) From: Abel Vesa To: Srinivas Kandagatla , Amol Maheshwari , Andy Gross , Bjorn Andersson , Konrad Dybcio , Ekansh Gupta Cc: Rob Herring , Krzysztof Kozlowski , Arnd Bergmann , Greg Kroah-Hartman , linux-arm-msm@vger.kernel.org, Linux Kernel Mailing List , devicetree@vger.kernel.org Subject: [PATCH v2 06/10] misc: fastrpc: Rework fastrpc_req_munmap Date: Fri, 2 Sep 2022 18:48:56 +0300 Message-Id: <20220902154900.3404524-7-abel.vesa@linaro.org> X-Mailer: git-send-email 2.34.1 In-Reply-To: <20220902154900.3404524-1-abel.vesa@linaro.org> References: <20220902154900.3404524-1-abel.vesa@linaro.org> MIME-Version: 1.0 Precedence: bulk List-ID: X-Mailing-List: linux-arm-msm@vger.kernel.org Move the lookup of the munmap request to the fastrpc_req_munmap and pass on only the buf to the lower level fastrpc_req_munmap_impl. That way we can use the lower level fastrpc_req_munmap_impl on error path in fastrpc_req_mmap to free the buf without searching for the munmap request it belongs to. Co-developed-by: Srinivas Kandagatla Signed-off-by: Srinivas Kandagatla Signed-off-by: Abel Vesa --- drivers/misc/fastrpc.c | 47 +++++++++++++++++++++--------------------- 1 file changed, 23 insertions(+), 24 deletions(-) diff --git a/drivers/misc/fastrpc.c b/drivers/misc/fastrpc.c index 5eececd9b6bd..7c364c58e379 100644 --- a/drivers/misc/fastrpc.c +++ b/drivers/misc/fastrpc.c @@ -1630,30 +1630,14 @@ static int fastrpc_get_dsp_info(struct fastrpc_user *fl, char __user *argp) return 0; } -static int fastrpc_req_munmap_impl(struct fastrpc_user *fl, - struct fastrpc_req_munmap *req) +static int fastrpc_req_munmap_impl(struct fastrpc_user *fl, struct fastrpc_buf *buf) { struct fastrpc_invoke_args args[1] = { [0] = { 0 } }; - struct fastrpc_buf *buf = NULL, *iter, *b; struct fastrpc_munmap_req_msg req_msg; struct device *dev = fl->sctx->dev; int err; u32 sc; - spin_lock(&fl->lock); - list_for_each_entry_safe(iter, b, &fl->mmaps, node) { - if ((iter->raddr == req->vaddrout) && (iter->size == req->size)) { - buf = iter; - break; - } - } - spin_unlock(&fl->lock); - - if (!buf) { - dev_err(dev, "mmap not in list\n"); - return -EINVAL; - } - req_msg.pgid = fl->tgid; req_msg.size = buf->size; req_msg.vaddr = buf->raddr; @@ -1679,12 +1663,29 @@ static int fastrpc_req_munmap_impl(struct fastrpc_user *fl, static int fastrpc_req_munmap(struct fastrpc_user *fl, char __user *argp) { + struct fastrpc_buf *buf = NULL, *iter, *b; struct fastrpc_req_munmap req; + struct device *dev = fl->sctx->dev; if (copy_from_user(&req, argp, sizeof(req))) return -EFAULT; - return fastrpc_req_munmap_impl(fl, &req); + spin_lock(&fl->lock); + list_for_each_entry_safe(iter, b, &fl->mmaps, node) { + if ((iter->raddr == req.vaddrout) && (iter->size == req.size)) { + buf = iter; + break; + } + } + spin_unlock(&fl->lock); + + if (!buf) { + dev_err(dev, "mmap\t\tpt 0x%09llx [len 0x%08llx] not in list\n", + req.vaddrout, req.size); + return -EINVAL; + } + + return fastrpc_req_munmap_impl(fl, buf); } static int fastrpc_req_mmap(struct fastrpc_user *fl, char __user *argp) @@ -1693,7 +1694,6 @@ static int fastrpc_req_mmap(struct fastrpc_user *fl, char __user *argp) struct fastrpc_buf *buf = NULL; struct fastrpc_mmap_req_msg req_msg; struct fastrpc_mmap_rsp_msg rsp_msg; - struct fastrpc_req_munmap req_unmap; struct fastrpc_phy_page pages; struct fastrpc_req_mmap req; struct device *dev = fl->sctx->dev; @@ -1755,11 +1755,8 @@ static int fastrpc_req_mmap(struct fastrpc_user *fl, char __user *argp) spin_unlock(&fl->lock); if (copy_to_user((void __user *)argp, &req, sizeof(req))) { - /* unmap the memory and release the buffer */ - req_unmap.vaddrout = buf->raddr; - req_unmap.size = buf->size; - fastrpc_req_munmap_impl(fl, &req_unmap); - return -EFAULT; + err = -EFAULT; + goto err_assign; } dev_dbg(dev, "mmap\t\tpt 0x%09lx OK [len 0x%08llx]\n", @@ -1767,6 +1764,8 @@ static int fastrpc_req_mmap(struct fastrpc_user *fl, char __user *argp) return 0; +err_assign: + fastrpc_req_munmap_impl(fl, buf); err_invoke: fastrpc_buf_free(buf);