From patchwork Fri Jan 13 09:35:31 2023 Content-Type: text/plain; charset="utf-8" MIME-Version: 1.0 Content-Transfer-Encoding: 7bit X-Patchwork-Submitter: Bard Liao X-Patchwork-Id: 13100379 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 alsa0.perex.cz (alsa0.perex.cz [77.48.224.243]) (using TLSv1.2 with cipher ECDHE-RSA-AES256-GCM-SHA384 (256/256 bits)) (No client certificate requested) by smtp.lore.kernel.org (Postfix) with ESMTPS id D949FC54EBD for ; Fri, 13 Jan 2023 09:29:39 +0000 (UTC) Received: from alsa1.perex.cz (alsa1.perex.cz [207.180.221.201]) (using TLSv1.2 with cipher ADH-AES256-GCM-SHA384 (256/256 bits)) (No client certificate requested) by alsa0.perex.cz (Postfix) with ESMTPS id D60AB8E4B; Fri, 13 Jan 2023 10:28:47 +0100 (CET) DKIM-Filter: OpenDKIM Filter v2.11.0 alsa0.perex.cz D60AB8E4B DKIM-Signature: v=1; a=rsa-sha256; c=relaxed/simple; d=alsa-project.org; s=default; t=1673602177; bh=9EfKDqwT5iUG/3vSHRo63HrB7tHmjW3+OTAvgNE6xiU=; h=From:To:Subject:Date:In-Reply-To:References:List-Id: List-Unsubscribe:List-Archive:List-Post:List-Help:List-Subscribe: Cc:From; b=jfEkHpIWSr7w1BtvolekN2SDJFc+B+PXelkRNLEFmwYo38eRbfQADWQQIiXJfHIjB bsBH4jYLCnnSwcgsuOpOj6RwQ5l9txY23VrvsZMujSqx7aY8RJ1fBjotgsTpPrVyuR 0odm9kXcRMnyP4UV3g/9E9QW8d+DyWowGO6FxzMA= Received: from alsa1.perex.cz (localhost.localdomain [127.0.0.1]) by alsa1.perex.cz (Postfix) with ESMTP id E4909F80563; Fri, 13 Jan 2023 10:27:48 +0100 (CET) Received: by alsa1.perex.cz (Postfix, from userid 50401) id 375D2F80558; Fri, 13 Jan 2023 10:27:47 +0100 (CET) Received: from mga01.intel.com (mga01.intel.com [192.55.52.88]) (using TLSv1.2 with cipher ECDHE-RSA-AES256-GCM-SHA384 (256/256 bits)) (No client certificate requested) by alsa1.perex.cz (Postfix) with ESMTPS id 0E7A4F80543 for ; Fri, 13 Jan 2023 10:27:44 +0100 (CET) DKIM-Filter: OpenDKIM Filter v2.11.0 alsa1.perex.cz 0E7A4F80543 Authentication-Results: alsa1.perex.cz; dkim=pass (2048-bit key, unprotected) header.d=intel.com header.i=@intel.com header.a=rsa-sha256 header.s=Intel header.b=Of90vXmV DKIM-Signature: v=1; a=rsa-sha256; c=relaxed/simple; d=intel.com; i=@intel.com; q=dns/txt; s=Intel; t=1673602066; x=1705138066; h=from:to:cc:subject:date:message-id:in-reply-to: references:mime-version:content-transfer-encoding; bh=9EfKDqwT5iUG/3vSHRo63HrB7tHmjW3+OTAvgNE6xiU=; b=Of90vXmVyJzZEP2w7inipb3BNV4RuwiEln05PUdiyJ0vnqHDt4hHfl/8 kzOXvzIkeQWvJJ99yjorQDbx5kw+jm8TKRLnjv42xLrH+td32fsPRBz+3 WKf4tFM6O0i3b1xE4FiZoufcCQfjmUgjePvN5/BJFZ0GfTFKNO79UxEh+ EjuLGVVKydI+59Jy0/JNFMCh4bhON0uzCFVS4FEzLz2p7GZMeSau0iKXZ GFxOrC9NTYeNsZfxqHuDLGRr2KlUXUGac3Xxz435Ulk6xJuTw7hbrjclj uaGWGpC/pQIYtTTyCDq4D290t7P39QJhdN2/qloqaHWUrlZOJp++LuaFh g==; X-IronPort-AV: E=McAfee;i="6500,9779,10588"; a="351189462" X-IronPort-AV: E=Sophos;i="5.97,213,1669104000"; d="scan'208";a="351189462" Received: from orsmga003.jf.intel.com ([10.7.209.27]) by fmsmga101.fm.intel.com with ESMTP/TLS/ECDHE-RSA-AES256-GCM-SHA384; 13 Jan 2023 01:27:27 -0800 X-IronPort-AV: E=McAfee;i="6500,9779,10588"; a="608116112" X-IronPort-AV: E=Sophos;i="5.97,213,1669104000"; d="scan'208";a="608116112" Received: from bard-ubuntu.sh.intel.com ([10.239.185.57]) by orsmga003-auth.jf.intel.com with ESMTP/TLS/ECDHE-RSA-AES256-GCM-SHA384; 13 Jan 2023 01:27:25 -0800 From: Bard Liao To: alsa-devel@alsa-project.org, vkoul@kernel.org Subject: [PATCH 4/5] soundwire: cadence: use directly bus sdw_defer structure Date: Fri, 13 Jan 2023 17:35:31 +0800 Message-Id: <20230113093532.3872113-5-yung-chuan.liao@linux.intel.com> X-Mailer: git-send-email 2.25.1 In-Reply-To: <20230113093532.3872113-1-yung-chuan.liao@linux.intel.com> References: <20230113093532.3872113-1-yung-chuan.liao@linux.intel.com> MIME-Version: 1.0 X-BeenThere: alsa-devel@alsa-project.org X-Mailman-Version: 2.1.29 Precedence: list List-Id: "Alsa-devel mailing list for ALSA developers - http://www.alsa-project.org" List-Unsubscribe: , List-Archive: List-Post: List-Help: List-Subscribe: , Cc: pierre-louis.bossart@linux.intel.com, vinod.koul@linaro.org, bard.liao@intel.com, linux-kernel@vger.kernel.org Errors-To: alsa-devel-bounces@alsa-project.org Sender: "Alsa-devel" From: Pierre-Louis Bossart Copying the bus sdw_defer structure into the Cadence internals leads to using stale pointers and kernel oopses on errors. It's just simpler and safer to use the bus sdw_defer structure directly. Link: https://github.com/thesofproject/linux/issues/4056 Signed-off-by: Pierre-Louis Bossart Reviewed-by: Ranjani Sridharan Signed-off-by: Bard Liao --- drivers/soundwire/bus.c | 2 +- drivers/soundwire/cadence_master.c | 17 ++++++++--------- drivers/soundwire/cadence_master.h | 5 +---- include/linux/soundwire/sdw.h | 3 +-- 4 files changed, 11 insertions(+), 16 deletions(-) diff --git a/drivers/soundwire/bus.c b/drivers/soundwire/bus.c index 572cc9a9af41..fc192d0c61e7 100644 --- a/drivers/soundwire/bus.c +++ b/drivers/soundwire/bus.c @@ -237,7 +237,7 @@ static inline int do_transfer_defer(struct sdw_bus *bus, init_completion(&defer->complete); for (i = 0; i <= retry; i++) { - resp = bus->ops->xfer_msg_defer(bus, msg, defer); + resp = bus->ops->xfer_msg_defer(bus, msg); ret = find_response_code(resp); /* if cmd is ok or ignored return */ if (ret == 0 || ret == -ENODATA) diff --git a/drivers/soundwire/cadence_master.c b/drivers/soundwire/cadence_master.c index 521387322145..2365395cb181 100644 --- a/drivers/soundwire/cadence_master.c +++ b/drivers/soundwire/cadence_master.c @@ -750,7 +750,7 @@ EXPORT_SYMBOL(cdns_xfer_msg); enum sdw_command_response cdns_xfer_msg_defer(struct sdw_bus *bus, - struct sdw_msg *msg, struct sdw_defer *defer) + struct sdw_msg *msg) { struct sdw_cdns *cdns = bus_to_cdns(bus); int cmd = 0, ret; @@ -763,9 +763,6 @@ cdns_xfer_msg_defer(struct sdw_bus *bus, if (ret) return SDW_CMD_FAIL_OTHER; - cdns->defer = defer; - cdns->defer->length = msg->len; - return _cdns_xfer_msg(cdns, msg, cmd, 0, msg->len, true); } EXPORT_SYMBOL(cdns_xfer_msg_defer); @@ -893,13 +890,15 @@ irqreturn_t sdw_cdns_irq(int irq, void *dev_id) return IRQ_NONE; if (int_status & CDNS_MCP_INT_RX_WL) { + struct sdw_bus *bus = &cdns->bus; + struct sdw_defer *defer = &bus->defer_msg; + cdns_read_response(cdns); - if (cdns->defer) { - cdns_fill_msg_resp(cdns, cdns->defer->msg, - cdns->defer->length, 0); - complete(&cdns->defer->complete); - cdns->defer = NULL; + if (defer && defer->msg) { + cdns_fill_msg_resp(cdns, defer->msg, + defer->length, 0); + complete(&defer->complete); } else { complete(&cdns->tx_complete); } diff --git a/drivers/soundwire/cadence_master.h b/drivers/soundwire/cadence_master.h index fa9dc38264a4..53029d22822d 100644 --- a/drivers/soundwire/cadence_master.h +++ b/drivers/soundwire/cadence_master.h @@ -109,7 +109,6 @@ struct sdw_cdns_dai_runtime { * @instance: instance number * @response_buf: SoundWire response buffer * @tx_complete: Tx completion - * @defer: Defer pointer * @ports: Data ports * @num_ports: Total number of data ports * @pcm: PCM streams @@ -130,7 +129,6 @@ struct sdw_cdns { u32 response_buf[CDNS_MCP_IP_MAX_CMD_LEN + 2]; struct completion tx_complete; - struct sdw_defer *defer; struct sdw_cdns_port *ports; int num_ports; @@ -189,8 +187,7 @@ enum sdw_command_response cdns_xfer_msg(struct sdw_bus *bus, struct sdw_msg *msg); enum sdw_command_response -cdns_xfer_msg_defer(struct sdw_bus *bus, - struct sdw_msg *msg, struct sdw_defer *defer); +cdns_xfer_msg_defer(struct sdw_bus *bus, struct sdw_msg *msg); u32 cdns_read_ping_status(struct sdw_bus *bus); diff --git a/include/linux/soundwire/sdw.h b/include/linux/soundwire/sdw.h index 3cd2a761911f..fb2bd1524a26 100644 --- a/include/linux/soundwire/sdw.h +++ b/include/linux/soundwire/sdw.h @@ -852,8 +852,7 @@ struct sdw_master_ops { enum sdw_command_response (*xfer_msg) (struct sdw_bus *bus, struct sdw_msg *msg); enum sdw_command_response (*xfer_msg_defer) - (struct sdw_bus *bus, struct sdw_msg *msg, - struct sdw_defer *defer); + (struct sdw_bus *bus, struct sdw_msg *msg); enum sdw_command_response (*reset_page_addr) (struct sdw_bus *bus, unsigned int dev_num); int (*set_bus_conf)(struct sdw_bus *bus,