From nobody Tue Feb 10 18:55:04 2026 Received: from smtp.kernel.org (aws-us-west-2-korg-mail-1.web.codeaurora.org [10.30.226.201]) (using TLSv1.2 with cipher ECDHE-RSA-AES256-GCM-SHA384 (256/256 bits)) (No client certificate requested) by smtp.subspace.kernel.org (Postfix) with ESMTPS id 83C9D2918D7; Mon, 12 May 2025 11:40:19 +0000 (UTC) Authentication-Results: smtp.subspace.kernel.org; arc=none smtp.client-ip=10.30.226.201 ARC-Seal: i=1; a=rsa-sha256; d=subspace.kernel.org; s=arc-20240116; t=1747050019; cv=none; b=gmrNHd7oy1PxBDeyzur/UWcJbqy+kq1wmFb+KQ211i6iuB7kY8EQNlmoVwA5pfYhH/DcXQbiO11yQQdgls42kvNun7e1cM4MWWAGOypVc5drm2fyVLrU/MNZMQ+7xaha4GDtpKXs/2EM0vF0EYRMSpFUN8nGyq/HDT8mTGbprV0= ARC-Message-Signature: i=1; a=rsa-sha256; d=subspace.kernel.org; s=arc-20240116; t=1747050019; c=relaxed/simple; bh=/PqeRx1G8yWgH2bpaj+v9geJqih0EWc+M09T0J5VbYU=; h=From:Date:Subject:MIME-Version:Content-Type:Message-Id:References: In-Reply-To:To:Cc; b=icoy6U0KI+UBXhtEw5RjafMIgNVNS189Yu9qzt4uhD09K+YPSfgA97nYd1Bj2tgPVWr3deJECkNA2ZkaODfqMcDdCXymxTjaniwnBBaYw4bSrqQxTxPLlPkDB7vbPT6+Ob5xo741fxnPsw7RcvXA9PxzOpsnAyYb9A4XLeS+Kiw= ARC-Authentication-Results: i=1; smtp.subspace.kernel.org; dkim=pass (2048-bit key) header.d=kernel.org header.i=@kernel.org header.b=JVKNdRtL; arc=none smtp.client-ip=10.30.226.201 Authentication-Results: smtp.subspace.kernel.org; dkim=pass (2048-bit key) header.d=kernel.org header.i=@kernel.org header.b="JVKNdRtL" Received: by smtp.kernel.org (Postfix) with ESMTPS id 0207CC4CEF8; Mon, 12 May 2025 11:40:18 +0000 (UTC) DKIM-Signature: v=1; a=rsa-sha256; c=relaxed/simple; d=kernel.org; s=k20201202; t=1747050019; bh=/PqeRx1G8yWgH2bpaj+v9geJqih0EWc+M09T0J5VbYU=; h=From:Date:Subject:References:In-Reply-To:To:Cc:Reply-To:From; b=JVKNdRtLhHEgwSwP78dDFvf8os7r2Ya+lLE7oGdI205ZB84fwV3ErJBWmiDYIuhre LxpLv7UYXsFDkbFJwryj1Ll/KJz2/PJRAdOArR0RzfNRIWY+eMw9deZpl7e54YWMNn SZUm8SOKR0dHqeQsx0L2NvRdUdj/hkwokl1Iscn1KcnOoNAMCIXVvcy1MN9jZdrMRc x4LEQcyr8KQCbHcHk1pCXFx/EXnejuOO/dPPQ/vWZRvx6y85J2ck7LO58ckuHb7w7l N7pJ6g8gj1tRrB3ytIaV9LjVL2HfjufjmBisNY0jLna1qLrCAvvX0G59ib61hUf7lS m5w1Hy9C24hzQ== Received: from aws-us-west-2-korg-lkml-1.web.codeaurora.org (localhost.localdomain [127.0.0.1]) by smtp.lore.kernel.org (Postfix) with ESMTP id E227BC3ABCD; Mon, 12 May 2025 11:40:18 +0000 (UTC) From: Mahesh Rao via B4 Relay Date: Mon, 12 May 2025 19:39:51 +0800 Subject: [PATCH v2 1/7] firmware: stratix10-svc: Add mutex lock and unlock in stratix10 memory allocation/free Precedence: bulk X-Mailing-List: linux-kernel@vger.kernel.org List-Id: List-Subscribe: List-Unsubscribe: MIME-Version: 1.0 Content-Type: text/plain; charset="utf-8" Content-Transfer-Encoding: quoted-printable Message-Id: <20250512-sip_svc_upstream-v2-1-fae5c45c059d@altera.com> References: <20250512-sip_svc_upstream-v2-0-fae5c45c059d@altera.com> In-Reply-To: <20250512-sip_svc_upstream-v2-0-fae5c45c059d@altera.com> To: Dinh Nguyen , Rob Herring , Krzysztof Kozlowski , Conor Dooley , Mahesh Rao Cc: Matthew Gerlach , linux-kernel@vger.kernel.org, devicetree@vger.kernel.org X-Mailer: b4 0.14.2 X-Developer-Signature: v=1; a=ed25519-sha256; t=1747050016; l=3909; i=mahesh.rao@altera.com; s=20250107; h=from:subject:message-id; bh=U7peSYw634W0vjNlQpTtWPEU2kILWkLlInRHSfUpC/A=; b=aATMkkE/hT3g6shV+y2mDaZrhthT/+T0kkMEPnnXPXoMKXjUSJWoV1pMj10cGJ296cr+g8+bo KVj5OaDNb5gCgJ8hB/JCKPGwbOSm8XTr3wIZQEVGJdkMAJ2A2E1DU2I X-Developer-Key: i=mahesh.rao@altera.com; a=ed25519; pk=tQiFUzoKxHrQLDtWeEeaeTeJTl/UfclUHWZy1fjSiyg= X-Endpoint-Received: by B4 Relay for mahesh.rao@altera.com/20250107 with auth_id=337 X-Original-From: Mahesh Rao Reply-To: mahesh.rao@altera.com From: Mahesh Rao This commit adds a mutex lock to stratix10_svc_allocate_memory and stratix10_svc_free_memory functions to ensure thread safety when allocating and freeing memory. This prevents potential race conditions and ensures synchronization. Signed-off-by: Mahesh Rao Reviewed-by: Matthew Gerlach --- drivers/firmware/stratix10-svc.c | 29 ++++++++++++++++++++++------- 1 file changed, 22 insertions(+), 7 deletions(-) diff --git a/drivers/firmware/stratix10-svc.c b/drivers/firmware/stratix10-= svc.c index e3f990d888d71829f0ab22b8a59aa7af0316bea0..3d42d4b18b7299d0a9e5110159e= 06253dfeddf88 100644 --- a/drivers/firmware/stratix10-svc.c +++ b/drivers/firmware/stratix10-svc.c @@ -1,6 +1,7 @@ // SPDX-License-Identifier: GPL-2.0 /* * Copyright (C) 2017-2018, Intel Corporation + * Copyright (C) 2025, Altera Corporation */ =20 #include @@ -171,6 +172,7 @@ struct stratix10_svc_chan { =20 static LIST_HEAD(svc_ctrl); static LIST_HEAD(svc_data_mem); +static DEFINE_MUTEX(svc_mem_lock); =20 /** * svc_pa_to_va() - translate physical address to virtual address @@ -182,14 +184,17 @@ static LIST_HEAD(svc_data_mem); static void *svc_pa_to_va(unsigned long addr) { struct stratix10_svc_data_mem *pmem; + void *ret =3D NULL; =20 pr_debug("claim back P-addr=3D0x%016x\n", (unsigned int)addr); + mutex_lock(&svc_mem_lock); list_for_each_entry(pmem, &svc_data_mem, node) - if (pmem->paddr =3D=3D addr) - return pmem->vaddr; - - /* physical address is not found */ - return NULL; + if (pmem->paddr =3D=3D addr) { + /* physical address is found */ + ret =3D pmem->vaddr; + } + mutex_unlock(&svc_mem_lock); + return ret; } =20 /** @@ -990,13 +995,16 @@ int stratix10_svc_send(struct stratix10_svc_chan *cha= n, void *msg) p_data->flag =3D ct->flags; } } else { + mutex_lock(&svc_mem_lock); list_for_each_entry(p_mem, &svc_data_mem, node) if (p_mem->vaddr =3D=3D p_msg->payload) { p_data->paddr =3D p_mem->paddr; p_data->size =3D p_msg->payload_length; break; } + mutex_unlock(&svc_mem_lock); if (p_msg->payload_output) { + mutex_lock(&svc_mem_lock); list_for_each_entry(p_mem, &svc_data_mem, node) if (p_mem->vaddr =3D=3D p_msg->payload_output) { p_data->paddr_output =3D @@ -1005,6 +1013,7 @@ int stratix10_svc_send(struct stratix10_svc_chan *cha= n, void *msg) p_msg->payload_length_output; break; } + mutex_unlock(&svc_mem_lock); } } =20 @@ -1072,9 +1081,12 @@ void *stratix10_svc_allocate_memory(struct stratix10= _svc_chan *chan, if (!pmem) return ERR_PTR(-ENOMEM); =20 + mutex_lock(&svc_mem_lock); va =3D gen_pool_alloc(genpool, s); - if (!va) + if (!va) { + mutex_unlock(&svc_mem_lock); return ERR_PTR(-ENOMEM); + } =20 memset((void *)va, 0, s); pa =3D gen_pool_virt_to_phys(genpool, va); @@ -1086,6 +1098,7 @@ void *stratix10_svc_allocate_memory(struct stratix10_= svc_chan *chan, pr_debug("%s: va=3D%p, pa=3D0x%016x\n", __func__, pmem->vaddr, (unsigned int)pmem->paddr); =20 + mutex_unlock(&svc_mem_lock); return (void *)va; } EXPORT_SYMBOL_GPL(stratix10_svc_allocate_memory); @@ -1100,6 +1113,7 @@ EXPORT_SYMBOL_GPL(stratix10_svc_allocate_memory); void stratix10_svc_free_memory(struct stratix10_svc_chan *chan, void *kadd= r) { struct stratix10_svc_data_mem *pmem; + mutex_lock(&svc_mem_lock); =20 list_for_each_entry(pmem, &svc_data_mem, node) if (pmem->vaddr =3D=3D kaddr) { @@ -1107,9 +1121,10 @@ void stratix10_svc_free_memory(struct stratix10_svc_= chan *chan, void *kaddr) (unsigned long)kaddr, pmem->size); pmem->vaddr =3D NULL; list_del(&pmem->node); + mutex_unlock(&svc_mem_lock); return; } - + mutex_unlock(&svc_mem_lock); list_del(&svc_data_mem); } EXPORT_SYMBOL_GPL(stratix10_svc_free_memory); --=20 2.35.3