From patchwork Thu Jan 19 07:32:08 2023 Content-Type: text/plain; charset="utf-8" MIME-Version: 1.0 Content-Transfer-Encoding: 7bit X-Patchwork-Submitter: "Liao, Bard" X-Patchwork-Id: 644131 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 B5DEBC38142 for ; Thu, 19 Jan 2023 07:25:07 +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 B6E075737; Thu, 19 Jan 2023 08:24:13 +0100 (CET) DKIM-Filter: OpenDKIM Filter v2.11.0 alsa0.perex.cz B6E075737 DKIM-Signature: v=1; a=rsa-sha256; c=relaxed/simple; d=alsa-project.org; s=default; t=1674113103; bh=FoI5xBiRDitd9OHdi7JRneCz/iRwjpZBUD404jd4Zsg=; h=From:To:Subject:Date:In-Reply-To:References:List-Id: List-Unsubscribe:List-Archive:List-Post:List-Help:List-Subscribe: Cc:From; b=Wu01W9MCP1S/jXV7yU3sWBgGj3rhGX0vmfTegaz/FbDXVShiehfF2JGlgogi0QlSz Pxm143MyC5wXGMh26f9+78Q4RaggHYGYQeOwGAuWEuv7Av0c3ZInxHwqemRN7mHGkY SCChK3GHkg7WgQPKtm9qOM746VMir6H5jDbX9LaE= Received: from alsa1.perex.cz (localhost.localdomain [127.0.0.1]) by alsa1.perex.cz (Postfix) with ESMTP id 927BAF804E6; Thu, 19 Jan 2023 08:23:50 +0100 (CET) Received: by alsa1.perex.cz (Postfix, from userid 50401) id 519A4F804FE; Thu, 19 Jan 2023 08:23:49 +0100 (CET) Received: from mga11.intel.com (mga11.intel.com [192.55.52.93]) (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 2374DF804DE for ; Thu, 19 Jan 2023 08:23:45 +0100 (CET) DKIM-Filter: OpenDKIM Filter v2.11.0 alsa1.perex.cz 2374DF804DE 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=ESzZsMZh DKIM-Signature: v=1; a=rsa-sha256; c=relaxed/simple; d=intel.com; i=@intel.com; q=dns/txt; s=Intel; t=1674113027; x=1705649027; h=from:to:cc:subject:date:message-id:in-reply-to: references:mime-version:content-transfer-encoding; bh=FoI5xBiRDitd9OHdi7JRneCz/iRwjpZBUD404jd4Zsg=; b=ESzZsMZhZ5x9GtZExrruTBThgDgGfz9B0G/5IpeI3gblEf1R2OaFylG4 6Yt3TpsmpdLFNxYML5QnYcMNRcfkhGzRGGFLfpPnWarzog7Sn9eL1wjEP H3otQZRUYdL6PlgMmztv82UMQDr51dGAe7eoNf3cMIgnkQ5rPj7j7jhAf /IbMF/cdLr/XLDo5lqAYwyqbFfVxkMuAn6pVSja0zhrwH5Ht0WJvO/oX4 81LrnraY7uCSsfS8Sa/tEWc173fNkp31aLYd6YDhlPovKuMJn+TAZn920 hx19BFr6j4bbeWjBP9BRXG4Hv1W6x1bqwUJntPd7k0G2jklUx39mnJvD7 w==; X-IronPort-AV: E=McAfee;i="6500,9779,10594"; a="322902665" X-IronPort-AV: E=Sophos;i="5.97,228,1669104000"; d="scan'208";a="322902665" 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 23:23:45 -0800 X-IronPort-AV: E=McAfee;i="6500,9779,10594"; a="662028008" X-IronPort-AV: E=Sophos;i="5.97,228,1669104000"; d="scan'208";a="662028008" 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 23:23:38 -0800 From: Bard Liao To: alsa-devel@alsa-project.org, vkoul@kernel.org Subject: [PATCH v2 1/4] soundwire: stream: use consistent pattern for freeing buffers Date: Thu, 19 Jan 2023 15:32:08 +0800 Message-Id: <20230119073211.85979-2-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 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 The code should free the message buffer used for data, the message structure used for control and assign the latter to NULL. The last part is missing for multi-link cases, and the order is inconsistent for single-link cases. 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/stream.c | 4 +++- 1 file changed, 3 insertions(+), 1 deletion(-) diff --git a/drivers/soundwire/stream.c b/drivers/soundwire/stream.c index df3b36670df4..9c13dbd2b26e 100644 --- a/drivers/soundwire/stream.c +++ b/drivers/soundwire/stream.c @@ -723,8 +723,8 @@ static int sdw_bank_switch(struct sdw_bus *bus, int m_rt_count) } if (!multi_link) { - kfree(wr_msg); kfree(wbuf); + kfree(wr_msg); bus->defer_msg.msg = NULL; bus->params.curr_bank = !bus->params.curr_bank; bus->params.next_bank = !bus->params.next_bank; @@ -769,6 +769,7 @@ static int sdw_ml_sync_bank_switch(struct sdw_bus *bus) if (bus->defer_msg.msg) { kfree(bus->defer_msg.msg->buf); kfree(bus->defer_msg.msg); + bus->defer_msg.msg = NULL; } return 0; @@ -867,6 +868,7 @@ static int do_bank_switch(struct sdw_stream_runtime *stream) if (bus->defer_msg.msg) { kfree(bus->defer_msg.msg->buf); kfree(bus->defer_msg.msg); + bus->defer_msg.msg = NULL; } } From patchwork Thu Jan 19 07:32:10 2023 Content-Type: text/plain; charset="utf-8" MIME-Version: 1.0 Content-Transfer-Encoding: 7bit X-Patchwork-Submitter: "Liao, Bard" X-Patchwork-Id: 644130 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 8C353C00A5A for ; Thu, 19 Jan 2023 07:25:43 +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 218AF57B2; Thu, 19 Jan 2023 08:24:46 +0100 (CET) DKIM-Filter: OpenDKIM Filter v2.11.0 alsa0.perex.cz 218AF57B2 DKIM-Signature: v=1; a=rsa-sha256; c=relaxed/simple; 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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 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 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,