From mboxrd@z Thu Jan 1 00:00:00 1970 Return-Path: X-Spam-Checker-Version: SpamAssassin 3.4.0 (2014-02-07) on aws-us-west-2-korg-lkml-1.web.codeaurora.org X-Spam-Level: X-Spam-Status: No, score=-12.8 required=3.0 tests=BAYES_00,DKIMWL_WL_HIGH, DKIM_SIGNED,DKIM_VALID,HEADER_FROM_DIFFERENT_DOMAINS,INCLUDES_PATCH, MAILING_LIST_MULTI,SIGNED_OFF_BY,SPF_HELO_NONE,SPF_PASS,URIBL_BLOCKED, USER_AGENT_GIT autolearn=unavailable autolearn_force=no version=3.4.0 Received: from mail.kernel.org (mail.kernel.org [198.145.29.99]) by smtp.lore.kernel.org (Postfix) with ESMTP id 59DC5C2D0A3 for ; Tue, 3 Nov 2020 20:40:16 +0000 (UTC) Received: from vger.kernel.org (vger.kernel.org [23.128.96.18]) by mail.kernel.org (Postfix) with ESMTP id 0558C223AC for ; Tue, 3 Nov 2020 20:40:15 +0000 (UTC) DKIM-Signature: v=1; a=rsa-sha256; c=relaxed/simple; d=kernel.org; s=default; t=1604436016; bh=QcMjzDod7yModzs0Cjm2McJaOvIUz808lnQ7EbXfL0o=; h=From:To:Cc:Subject:Date:In-Reply-To:References:List-ID:From; b=fuoHXiIspvHmge11L/3rrCgZGz8sx8Zk+AOEWm7B5cLs9OBq6iWwvxe+85Esnh+/z LUNlfrXWcbRsF0lXMX0QtEFcFJHqJ+G4USA1YHADZSdqe6vLFrEmVTKQAebSB/GfUO DIWy86W3ywU9SmMWjhrGOzc0ifQ56IkR2fhkxNQc= Received: (majordomo@vger.kernel.org) by vger.kernel.org via listexpand id S1730149AbgKCUkO (ORCPT ); Tue, 3 Nov 2020 15:40:14 -0500 Received: from mail.kernel.org ([198.145.29.99]:51350 "EHLO mail.kernel.org" rhost-flags-OK-OK-OK-OK) by vger.kernel.org with ESMTP id S1730132AbgKCUkJ (ORCPT ); Tue, 3 Nov 2020 15:40:09 -0500 Received: from localhost (83-86-74-64.cable.dynamic.v4.ziggo.nl [83.86.74.64]) (using TLSv1.2 with cipher ECDHE-RSA-AES256-GCM-SHA384 (256/256 bits)) (No client certificate requested) by mail.kernel.org (Postfix) with ESMTPSA id E9B842224E; Tue, 3 Nov 2020 20:40:07 +0000 (UTC) DKIM-Signature: v=1; a=rsa-sha256; c=relaxed/simple; d=kernel.org; s=default; t=1604436008; bh=QcMjzDod7yModzs0Cjm2McJaOvIUz808lnQ7EbXfL0o=; h=From:To:Cc:Subject:Date:In-Reply-To:References:From; b=LZzt6uD25dm/fZqWkk9mCYbg/GAaQQ1Ni9DYBrJ/Vg9S+OtCbmhXHXWTIJ0r85Fg8 ULyYgOqakiKUHdO9cs4vhJNqFlGmVi2qx4XOJ5nxC3soLvFAQVirEouOSsTBDNTukx mKeKVjqV7Cp5Ls2iK5fdfSoNJ8Km8DtfiDG+7e4k= From: Greg Kroah-Hartman To: linux-kernel@vger.kernel.org Cc: Greg Kroah-Hartman , stable@vger.kernel.org, Peng Fan , Etienne Carriere , Sudeep Holla , Sasha Levin Subject: [PATCH 5.9 015/391] firmware: arm_scmi: Expand SMC/HVC message pool to more than one Date: Tue, 3 Nov 2020 21:31:06 +0100 Message-Id: <20201103203349.005811778@linuxfoundation.org> X-Mailer: git-send-email 2.29.2 In-Reply-To: <20201103203348.153465465@linuxfoundation.org> References: <20201103203348.153465465@linuxfoundation.org> User-Agent: quilt/0.66 MIME-Version: 1.0 Content-Type: text/plain; charset=UTF-8 Content-Transfer-Encoding: 8bit Precedence: bulk List-ID: X-Mailing-List: linux-kernel@vger.kernel.org From: Etienne Carriere [ Upstream commit 7adb2c8aaaa6a387af7140e57004beba2c04a4c6 ] SMC/HVC can transmit only one message at the time as the shared memory needs to be protected and the calls are synchronous. However, in order to allow multiple threads to send SCMI messages simultaneously, we need a larger poll of memory. Let us just use value of 20 to keep it in sync mailbox transport implementation. Any other value must work perfectly. Link: https://lore.kernel.org/r/20201008143722.21888-4-etienne.carriere@linaro.org Fixes: 1dc6558062da ("firmware: arm_scmi: Add smc/hvc transport") Cc: Peng Fan Signed-off-by: Etienne Carriere [sudeep.holla: reworded the commit message to indicate the practicality] Signed-off-by: Sudeep Holla Signed-off-by: Sasha Levin --- drivers/firmware/arm_scmi/smc.c | 2 +- 1 file changed, 1 insertion(+), 1 deletion(-) diff --git a/drivers/firmware/arm_scmi/smc.c b/drivers/firmware/arm_scmi/smc.c index a1537d123e385..22f83af6853a1 100644 --- a/drivers/firmware/arm_scmi/smc.c +++ b/drivers/firmware/arm_scmi/smc.c @@ -149,6 +149,6 @@ static struct scmi_transport_ops scmi_smc_ops = { const struct scmi_desc scmi_smc_desc = { .ops = &scmi_smc_ops, .max_rx_timeout_ms = 30, - .max_msg = 1, + .max_msg = 20, .max_msg_size = 128, }; -- 2.27.0