From patchwork Fri Jun 14 04:01:33 2024 Content-Type: text/plain; charset="utf-8" MIME-Version: 1.0 Content-Transfer-Encoding: 7bit X-Patchwork-Submitter: "Jason-JH.Lin" X-Patchwork-Id: 13697861 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 bombadil.infradead.org (bombadil.infradead.org [198.137.202.133]) (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 15E4FC27C77 for ; Fri, 14 Jun 2024 04:01:59 +0000 (UTC) DKIM-Signature: v=1; a=rsa-sha256; q=dns/txt; c=relaxed/relaxed; d=lists.infradead.org; s=bombadil.20210309; h=Sender:List-Subscribe:List-Help :List-Post:List-Archive:List-Unsubscribe:List-Id:Content-Type:MIME-Version: References:In-Reply-To:Message-ID:Date:Subject:CC:To:From:Reply-To: Content-Transfer-Encoding:Content-ID:Content-Description:Resent-Date: Resent-From:Resent-Sender:Resent-To:Resent-Cc:Resent-Message-ID:List-Owner; bh=oNX/6xJwVVdxINFYHElAcSxjFjZW+WO3wSYq/VQB9l8=; b=WYtR6hC4lKB6nVbPpbQRf/LiOS YDGaDCyx/AcH7ALxOG3BF1FTZh6GGKcKuON2DwmgW4DWF5hqhDLWGv4Xz4TLd2nEoiVaRKgYQHsEv zEnnw5BIYyPL2arPN0QWwsV3iDJ8f6fguKEsd7zY2Wxw9bpDpGpjyxoQzy7iFp4rwwyvvOpsfpPt8 Xogo76yDBAuHPvBup6LE30ldkxVUsKIrR9bVe6MvINsSRWPB+bSYlMRQ8dyckWjxIv+KKVBck+3hR 1OG2es8CTTM3TRj/871F6WFuttwHwKaLG0ac3v01mFmT3D8Zy/KbrwbLY4JCwhjY+SwCvubEGuMCE bIPI6GYA==; Received: from localhost ([::1] helo=bombadil.infradead.org) by bombadil.infradead.org with esmtp (Exim 4.97.1 #2 (Red Hat Linux)) id 1sHy8I-00000001LMD-0rHI; Fri, 14 Jun 2024 04:01:46 +0000 Received: from mailgw02.mediatek.com ([216.200.240.185]) by bombadil.infradead.org with esmtps (Exim 4.97.1 #2 (Red Hat Linux)) id 1sHy8E-00000001LLT-3gzV; Fri, 14 Jun 2024 04:01:44 +0000 X-UUID: cbfd43262a0211efba8bfb22b0451c12-20240613 DKIM-Signature: v=1; a=rsa-sha256; q=dns/txt; c=relaxed/relaxed; d=mediatek.com; s=dk; h=Content-Type:MIME-Version:References:In-Reply-To:Message-ID:Date:Subject:CC:To:From; bh=oNX/6xJwVVdxINFYHElAcSxjFjZW+WO3wSYq/VQB9l8=; b=sjXL8UqGlWgIsnSo9lrwDIATD+jETQMlrfUpOs7JNrM2puod97FJGW150fc/atq+ZdTIxQR9BPCPpOjgCURwu1LN3l1FPAtdijzMcGzyarVHe9WBr441yHuZEGf2Y6lLcPa7qoJC/xqe+4WjsU6SOFGm50leCcm1mNmJOexY8yc=; X-CID-P-RULE: Release_Ham X-CID-O-INFO: VERSION:1.1.39,REQID:19b4b44b-d2d5-4b68-806e-c722f812b85b,IP:0,U RL:0,TC:0,Content:0,EDM:0,RT:0,SF:0,FILE:0,BULK:0,RULE:Release_Ham,ACTION: release,TS:0 X-CID-META: VersionHash:393d96e,CLOUDID:50d09288-8d4f-477b-89d2-1e3bdbef96d1,B ulkID:nil,BulkQuantity:0,Recheck:0,SF:102,TC:nil,Content:0,EDM:-3,IP:nil,U RL:11|1,File:nil,RT:nil,Bulk:nil,QS:nil,BEC:nil,COL:0,OSI:0,OSA:0,AV:0,LES :1,SPR:NO,DKR:0,DKP:0,BRR:0,BRE:0,ARC:0 X-CID-BVR: 0,NGT X-CID-BAS: 0,NGT,0,_ X-CID-FACTOR: TF_CID_SPAM_SNR,TF_CID_SPAM_ULN X-UUID: cbfd43262a0211efba8bfb22b0451c12-20240613 Received: from mtkmbs13n2.mediatek.inc [(172.21.101.108)] by mailgw02.mediatek.com (envelope-from ) (musrelay.mediatek.com ESMTP with TLSv1.2 ECDHE-RSA-AES256-GCM-SHA384 256/256) with ESMTP id 1866911281; Thu, 13 Jun 2024 21:01:37 -0700 Received: from mtkmbs11n2.mediatek.inc (172.21.101.187) by mtkmbs11n1.mediatek.inc (172.21.101.185) with Microsoft SMTP Server (version=TLS1_2, cipher=TLS_ECDHE_RSA_WITH_AES_256_GCM_SHA384) id 15.2.1118.26; Fri, 14 Jun 2024 12:01:34 +0800 Received: from mtksdccf07.mediatek.inc (172.21.84.99) by mtkmbs11n2.mediatek.inc (172.21.101.73) with Microsoft SMTP Server id 15.2.1118.26 via Frontend Transport; Fri, 14 Jun 2024 12:01:34 +0800 From: Jason-JH.Lin To: Jassi Brar , Chun-Kuang Hu , AngeloGioacchino Del Regno CC: Matthias Brugger , "Jason-JH . Lin" , Singo Chang , Nancy Lin , , , , Subject: [PATCH 2/2] mailbox: mtk-cmdq: Move pm_runimte_get and put to mbox_chan_ops API Date: Fri, 14 Jun 2024 12:01:33 +0800 Message-ID: <20240614040133.24967-3-jason-jh.lin@mediatek.com> X-Mailer: git-send-email 2.18.0 In-Reply-To: <20240614040133.24967-1-jason-jh.lin@mediatek.com> References: <20240614040133.24967-1-jason-jh.lin@mediatek.com> MIME-Version: 1.0 X-MTK: N X-CRM114-Version: 20100106-BlameMichelson ( TRE 0.8.0 (BSD) ) MR-646709E3 X-CRM114-CacheID: sfid-20240613_210143_207602_7BAC219B X-CRM114-Status: GOOD ( 13.93 ) X-BeenThere: linux-arm-kernel@lists.infradead.org X-Mailman-Version: 2.1.34 Precedence: list List-Id: List-Unsubscribe: , List-Archive: List-Post: List-Help: List-Subscribe: , Sender: "linux-arm-kernel" Errors-To: linux-arm-kernel-bounces+linux-arm-kernel=archiver.kernel.org@lists.infradead.org When we run kernel with lockdebug option, we will get the BUG below: BUG: sleeping function called from invalid context at drivers/base/power/runtime.c:1164 in_atomic(): 1, irqs_disabled(): 128, non_block: 0, pid: 3616, name: kworker/u17:3 preempt_count: 1, expected: 0 RCU nest depth: 0, expected: 0 INFO: lockdep is turned off. irq event stamp: 0 CPU: 1 PID: 3616 Comm: kworker/u17:3 Not tainted 6.1.87-lockdep-14133-g26e933aca785 #1 Hardware name: Google Ciri sku0/unprovisioned board (DT) Workqueue: imgsys_runner imgsys_runner_func Call trace: dump_backtrace+0x100/0x120 show_stack+0x20/0x2c dump_stack_lvl+0x84/0xb4 dump_stack+0x18/0x48 __might_resched+0x354/0x4c0 __might_sleep+0x98/0xe4 __pm_runtime_resume+0x70/0x124 cmdq_mbox_send_data+0xe4/0xb1c msg_submit+0x194/0x2dc mbox_send_message+0x190/0x330 imgsys_cmdq_sendtask+0x1618/0x2224 imgsys_runner_func+0xac/0x11c process_one_work+0x638/0xf84 worker_thread+0x808/0xcd0 kthread+0x24c/0x324 ret_from_fork+0x10/0x20 We found that there is a spin_lock_irqsave protection in msg_submit() of mailbox.c and it is in the atomic context. So when cmdq driver calls pm_runtime_get_sync() in cmdq_mbox_send_data(), it will get this BUG report. To avoid using sleep in atomic context, move pm_runtime_get_sync to mbox_chan_ops->power_get and also move pm_runtime_put_autosuspend to mbox_chan_ops->power_put. Fixes: 8afe816b0c99 ("mailbox: mtk-cmdq-mailbox: Implement Runtime PM with autosuspend") Signed-off-by: Jason-JH.Lin --- drivers/mailbox/mtk-cmdq-mailbox.c | 37 +++++++++++++++--------------- 1 file changed, 18 insertions(+), 19 deletions(-) diff --git a/drivers/mailbox/mtk-cmdq-mailbox.c b/drivers/mailbox/mtk-cmdq-mailbox.c index 4aa394e91109..02cef3eee35a 100644 --- a/drivers/mailbox/mtk-cmdq-mailbox.c +++ b/drivers/mailbox/mtk-cmdq-mailbox.c @@ -387,20 +387,13 @@ static int cmdq_mbox_send_data(struct mbox_chan *chan, void *data) struct cmdq *cmdq = dev_get_drvdata(chan->mbox->dev); struct cmdq_task *task; unsigned long curr_pa, end_pa; - int ret; /* Client should not flush new tasks if suspended. */ WARN_ON(cmdq->suspended); - ret = pm_runtime_get_sync(cmdq->mbox.dev); - if (ret < 0) - return ret; - task = kzalloc(sizeof(*task), GFP_ATOMIC); - if (!task) { - pm_runtime_put_autosuspend(cmdq->mbox.dev); + if (!task) return -ENOMEM; - } task->cmdq = cmdq; INIT_LIST_HEAD(&task->list_entry); @@ -448,7 +441,6 @@ static int cmdq_mbox_send_data(struct mbox_chan *chan, void *data) list_move_tail(&task->list_entry, &thread->task_busy_list); pm_runtime_mark_last_busy(cmdq->mbox.dev); - pm_runtime_put_autosuspend(cmdq->mbox.dev); return 0; } @@ -465,8 +457,6 @@ static void cmdq_mbox_shutdown(struct mbox_chan *chan) struct cmdq_task *task, *tmp; unsigned long flags; - WARN_ON(pm_runtime_get_sync(cmdq->mbox.dev) < 0); - spin_lock_irqsave(&thread->chan->lock, flags); if (list_empty(&thread->task_busy_list)) goto done; @@ -496,7 +486,6 @@ static void cmdq_mbox_shutdown(struct mbox_chan *chan) spin_unlock_irqrestore(&thread->chan->lock, flags); pm_runtime_mark_last_busy(cmdq->mbox.dev); - pm_runtime_put_autosuspend(cmdq->mbox.dev); } static int cmdq_mbox_flush(struct mbox_chan *chan, unsigned long timeout) @@ -507,11 +496,6 @@ static int cmdq_mbox_flush(struct mbox_chan *chan, unsigned long timeout) struct cmdq_task *task, *tmp; unsigned long flags; u32 enable; - int ret; - - ret = pm_runtime_get_sync(cmdq->mbox.dev); - if (ret < 0) - return ret; spin_lock_irqsave(&thread->chan->lock, flags); if (list_empty(&thread->task_busy_list)) @@ -536,7 +520,6 @@ static int cmdq_mbox_flush(struct mbox_chan *chan, unsigned long timeout) out: spin_unlock_irqrestore(&thread->chan->lock, flags); pm_runtime_mark_last_busy(cmdq->mbox.dev); - pm_runtime_put_autosuspend(cmdq->mbox.dev); return 0; @@ -551,15 +534,31 @@ static int cmdq_mbox_flush(struct mbox_chan *chan, unsigned long timeout) return -EFAULT; } pm_runtime_mark_last_busy(cmdq->mbox.dev); - pm_runtime_put_autosuspend(cmdq->mbox.dev); + return 0; } +static int cmdq_mbox_pm_resume(struct mbox_chan *chan) +{ + struct cmdq *cmdq = dev_get_drvdata(chan->mbox->dev); + + return pm_runtime_get_sync(cmdq->mbox.dev); +} + +static void cmdq_mbox_pm_susepnd(struct mbox_chan *chan) +{ + struct cmdq *cmdq = dev_get_drvdata(chan->mbox->dev); + + pm_runtime_put_autosuspend(cmdq->mbox.dev); +} + static const struct mbox_chan_ops cmdq_mbox_chan_ops = { .send_data = cmdq_mbox_send_data, .startup = cmdq_mbox_startup, .shutdown = cmdq_mbox_shutdown, .flush = cmdq_mbox_flush, + .power_get = cmdq_mbox_pm_resume, + .power_put = cmdq_mbox_pm_susepnd, }; static struct mbox_chan *cmdq_xlate(struct mbox_controller *mbox,