From mboxrd@z Thu Jan 1 00:00:00 1970 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 7641834D4E4; Tue, 6 Jan 2026 17:57:01 +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=1767722221; cv=none; b=V5jTy+5K6lekuXFQG/0DbKI3ECHFjUk7PtLdZ2wokgiGPWfRy2OdNM+22CG7X2O7KjoiAjQnVTUR4KoK34XyHoEHsEY1iuDEEtQ29BHb9tFx90FMx05uU3SF0/CNIdtTV4ZLuw1tKjEDJeWC/em1G58JdVdxUF8GmBqsN++KbHc= ARC-Message-Signature:i=1; a=rsa-sha256; d=subspace.kernel.org; s=arc-20240116; t=1767722221; c=relaxed/simple; bh=tMiWbtS2/Z4bJgrpBMNB8LLIm+wM4GZSESv1oA598ZE=; h=From:To:Cc:Subject:Date:Message-ID:In-Reply-To:References: MIME-Version; b=Tv46gF3lrqKmmwipjB7mqlbfWcuqBuHoCIsGfhq2PC8cSuPsMyd+zI4ADaSASnTGd75W2/H6+rnRwljjpa3F/tLjvl4vzj/rHSKtSIY8wcb5qyczfq3m8UCiTcN/a7Al/6mehLdUWWUKTtEpJke286XnIejTqAozmYB2rXBL1SM= ARC-Authentication-Results:i=1; smtp.subspace.kernel.org; dkim=pass (1024-bit key) header.d=linuxfoundation.org header.i=@linuxfoundation.org header.b=U2OlAzqz; arc=none smtp.client-ip=10.30.226.201 Authentication-Results: smtp.subspace.kernel.org; dkim=pass (1024-bit key) header.d=linuxfoundation.org header.i=@linuxfoundation.org header.b="U2OlAzqz" Received: by smtp.kernel.org (Postfix) with ESMTPSA id B5D68C116C6; Tue, 6 Jan 2026 17:57:00 +0000 (UTC) DKIM-Signature: v=1; a=rsa-sha256; c=relaxed/simple; d=linuxfoundation.org; s=korg; t=1767722221; bh=tMiWbtS2/Z4bJgrpBMNB8LLIm+wM4GZSESv1oA598ZE=; h=From:To:Cc:Subject:Date:In-Reply-To:References:From; b=U2OlAzqz86BgaOEOZZK8X+tprPZR5nmAyhzcxElRJTbl2ZYh++AQ9PVgtVJWxNQdO WLdW9J72v3gz/tYsxA+Cd0iwGKhC6CJ9f91U1fCNQVZrpgguGg0Eo8EIq65HJ2KvHS VcOmV991YJe8t/69tZ/3/az5U8QnDnWdzPKj4Fw4= From: Greg Kroah-Hartman To: stable@vger.kernel.org Cc: Greg Kroah-Hartman , patches@lists.linux.dev, Mahesh Rao , Matthew Gerlach , Dinh Nguyen Subject: [PATCH 6.18 166/312] firmware: stratix10-svc: Add mutex in stratix10 memory management Date: Tue, 6 Jan 2026 18:04:00 +0100 Message-ID: <20260106170553.839762719@linuxfoundation.org> X-Mailer: git-send-email 2.52.0 In-Reply-To: <20260106170547.832845344@linuxfoundation.org> References: <20260106170547.832845344@linuxfoundation.org> User-Agent: quilt/0.69 X-stable: review X-Patchwork-Hint: ignore Precedence: bulk X-Mailing-List: stable@vger.kernel.org List-Id: List-Subscribe: List-Unsubscribe: MIME-Version: 1.0 Content-Transfer-Encoding: 8bit 6.18-stable review patch. If anyone has any objections, please let me know. ------------------ From: Mahesh Rao commit 85f96cbbbc67b59652b2c1ec394b8ddc0ddf1b0b upstream. Add mutex lock to stratix10_svc_allocate_memory and stratix10_svc_free_memory for thread safety. This prevents race conditions and ensures proper synchronization during memory operations. This is required for parallel communication with the Stratix10 service channel. Fixes: 7ca5ce896524f ("firmware: add Intel Stratix10 service layer driver") Cc: stable@vger.kernel.org Signed-off-by: Mahesh Rao Reviewed-by: Matthew Gerlach Signed-off-by: Dinh Nguyen Signed-off-by: Greg Kroah-Hartman --- drivers/firmware/stratix10-svc.c | 11 +++++++++++ 1 file changed, 11 insertions(+) --- 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 */ #include @@ -176,6 +177,12 @@ static LIST_HEAD(svc_ctrl); static LIST_HEAD(svc_data_mem); /** + * svc_mem_lock protects access to the svc_data_mem list for + * concurrent multi-client operations + */ +static DEFINE_MUTEX(svc_mem_lock); + +/** * svc_pa_to_va() - translate physical address to virtual address * @addr: to be translated physical address * @@ -187,6 +194,7 @@ static void *svc_pa_to_va(unsigned long struct stratix10_svc_data_mem *pmem; pr_debug("claim back P-addr=0x%016x\n", (unsigned int)addr); + guard(mutex)(&svc_mem_lock); list_for_each_entry(pmem, &svc_data_mem, node) if (pmem->paddr == addr) return pmem->vaddr; @@ -993,6 +1001,7 @@ int stratix10_svc_send(struct stratix10_ p_data->flag = ct->flags; } } else { + guard(mutex)(&svc_mem_lock); list_for_each_entry(p_mem, &svc_data_mem, node) if (p_mem->vaddr == p_msg->payload) { p_data->paddr = p_mem->paddr; @@ -1075,6 +1084,7 @@ void *stratix10_svc_allocate_memory(stru if (!pmem) return ERR_PTR(-ENOMEM); + guard(mutex)(&svc_mem_lock); va = gen_pool_alloc(genpool, s); if (!va) return ERR_PTR(-ENOMEM); @@ -1103,6 +1113,7 @@ EXPORT_SYMBOL_GPL(stratix10_svc_allocate void stratix10_svc_free_memory(struct stratix10_svc_chan *chan, void *kaddr) { struct stratix10_svc_data_mem *pmem; + guard(mutex)(&svc_mem_lock); list_for_each_entry(pmem, &svc_data_mem, node) if (pmem->vaddr == kaddr) {