From nobody Sun Sep 14 20:23:22 2025 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 66B25C46467 for ; Thu, 19 Jan 2023 07:24:26 +0000 (UTC) Received: (majordomo@vger.kernel.org) by vger.kernel.org via listexpand id S229740AbjASHYZ (ORCPT ); Thu, 19 Jan 2023 02:24:25 -0500 Received: from lindbergh.monkeyblade.net ([23.128.96.19]:38080 "EHLO lindbergh.monkeyblade.net" rhost-flags-OK-OK-OK-OK) by vger.kernel.org with ESMTP id S229779AbjASHYE (ORCPT ); Thu, 19 Jan 2023 02:24:04 -0500 Received: from mga11.intel.com (mga11.intel.com [192.55.52.93]) by lindbergh.monkeyblade.net (Postfix) with ESMTPS id CE18F61D65 for ; Wed, 18 Jan 2023 23:23:56 -0800 (PST) DKIM-Signature: v=1; a=rsa-sha256; c=relaxed/simple; d=intel.com; i=@intel.com; q=dns/txt; s=Intel; t=1674113036; x=1705649036; h=from:to:cc:subject:date:message-id:in-reply-to: references:mime-version:content-transfer-encoding; bh=9EfKDqwT5iUG/3vSHRo63HrB7tHmjW3+OTAvgNE6xiU=; b=fwSFWCA3VoaA+T3ht/94ELuEjUP++xTsHwrnz+eOMokFII9xJ8Jm6uYC dEdIltuHUA6TW1NxSb28QqERTluvlhqRg0o1txLuBDH5Q5HdHwYz7N3KC Efuf308thWRbWBK3WpCBdP/9IVCLzoDlppeVHBhArZn98YnoHUo08avE8 8rw22lqc27GcT35CK8C00F6IHFMGXH5APdrd8amHHTpaDmw55zvSKvX15 Yt3ISuh3+Jb6mBqMEmi4vUYoKXID8NXzY/PGDyNAe79yT2SANqEp1zcTc UUQ4faZGBgzFmjFk+9cKg/ALFmtOtMvbOGcDTtxeQA8LLDHFhvvW6nYm1 w==; X-IronPort-AV: E=McAfee;i="6500,9779,10594"; a="322902678" X-IronPort-AV: E=Sophos;i="5.97,228,1669104000"; d="scan'208";a="322902678" Received: from fmsmga007.fm.intel.com ([10.253.24.52]) by fmsmga102.fm.intel.com with ESMTP/TLS/ECDHE-RSA-AES256-GCM-SHA384; 18 Jan 2023 23:23:51 -0800 X-IronPort-AV: E=McAfee;i="6500,9779,10594"; a="662028041" X-IronPort-AV: E=Sophos;i="5.97,228,1669104000"; d="scan'208";a="662028041" Received: from bard-ubuntu.sh.intel.com ([10.239.185.57]) by fmsmga007-auth.fm.intel.com with ESMTP/TLS/ECDHE-RSA-AES256-GCM-SHA384; 18 Jan 2023 23:23:44 -0800 From: Bard Liao To: alsa-devel@alsa-project.org, vkoul@kernel.org Cc: vinod.koul@linaro.org, linux-kernel@vger.kernel.org, pierre-louis.bossart@linux.intel.com, bard.liao@intel.com Subject: [PATCH v2 3/4] soundwire: cadence: use directly bus sdw_defer structure Date: Thu, 19 Jan 2023 15:32:10 +0800 Message-Id: <20230119073211.85979-4-yung-chuan.liao@linux.intel.com> X-Mailer: git-send-email 2.25.1 In-Reply-To: <20230119073211.85979-1-yung-chuan.liao@linux.intel.com> References: <20230119073211.85979-1-yung-chuan.liao@linux.intel.com> MIME-Version: 1.0 Content-Transfer-Encoding: quoted-printable Precedence: bulk List-ID: X-Mailing-List: linux-kernel@vger.kernel.org Content-Type: text/plain; charset="utf-8" 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); =20 for (i =3D 0; i <=3D retry; i++) { - resp =3D bus->ops->xfer_msg_defer(bus, msg, defer); + resp =3D bus->ops->xfer_msg_defer(bus, msg); ret =3D find_response_code(resp); /* if cmd is ok or ignored return */ if (ret =3D=3D 0 || ret =3D=3D -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); =20 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 =3D bus_to_cdns(bus); int cmd =3D 0, ret; @@ -763,9 +763,6 @@ cdns_xfer_msg_defer(struct sdw_bus *bus, if (ret) return SDW_CMD_FAIL_OTHER; =20 - cdns->defer =3D defer; - cdns->defer->length =3D 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; =20 if (int_status & CDNS_MCP_INT_RX_WL) { + struct sdw_bus *bus =3D &cdns->bus; + struct sdw_defer *defer =3D &bus->defer_msg; + cdns_read_response(cdns); =20 - if (cdns->defer) { - cdns_fill_msg_resp(cdns, cdns->defer->msg, - cdns->defer->length, 0); - complete(&cdns->defer->complete); - cdns->defer =3D 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]; =20 struct completion tx_complete; - struct sdw_defer *defer; =20 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); =20 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); =20 u32 cdns_read_ping_status(struct sdw_bus *bus); =20 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, --=20 2.25.1