From patchwork Thu Oct 24 01:54:53 2024 Content-Type: text/plain; charset="utf-8" MIME-Version: 1.0 Content-Transfer-Encoding: 7bit X-Patchwork-Submitter: =?utf-8?b?UGV0ZXIgV2FuZyAo546L5L+h5Y+LKQ==?= X-Patchwork-Id: 13848177 Received: from mailgw01.mediatek.com (unknown [60.244.123.138]) (using TLSv1.2 with cipher ECDHE-RSA-AES256-GCM-SHA384 (256/256 bits)) (No client certificate requested) by smtp.subspace.kernel.org (Postfix) with ESMTPS id B1DF31BDDF; Thu, 24 Oct 2024 01:54:59 +0000 (UTC) Authentication-Results: smtp.subspace.kernel.org; arc=none smtp.client-ip=60.244.123.138 ARC-Seal: i=1; a=rsa-sha256; d=subspace.kernel.org; s=arc-20240116; t=1729734902; cv=none; b=u0QJTGGh/3+tFLhVF97b65A7nUXxAXkwvo8MO4onWnHQpmorxdS2MJGpD9LcGb7FDbUnqduYAzsKkFo9bdEl0PA5zg/UWsLCjehq066KiyezMHjf/Ds1A4fHpP+EoRq3b8ZkYKlIAG5va5mr1d4N/56vKnO4QvC1Q6gZXd4NgLU= ARC-Message-Signature: i=1; a=rsa-sha256; d=subspace.kernel.org; s=arc-20240116; t=1729734902; c=relaxed/simple; bh=VKjnzWViqaacwxmVr+4DEPsTuDpMIYUv315O6plHzSI=; h=From:To:CC:Subject:Date:Message-ID:MIME-Version:Content-Type; b=nIwmBVKrHnvQmAeP9zx8cslbH8u7QFWe6OEdfLGA1ZGjpnof9rINxav3mfEqCn+F9wGTrAbpoVd2PnMAS8LiW/6JMwR91TkCbwbVKTyW3iau1riF6iXk1TRnV6x+vzbgFC7Fc/VklwlHwS6ZwBBlpwKfhJ03MpADRnrOdnUTJzA= ARC-Authentication-Results: i=1; smtp.subspace.kernel.org; dmarc=pass (p=quarantine dis=none) header.from=mediatek.com; spf=pass smtp.mailfrom=mediatek.com; dkim=pass (1024-bit key) header.d=mediatek.com header.i=@mediatek.com header.b=Z0awVBZk; arc=none smtp.client-ip=60.244.123.138 Authentication-Results: smtp.subspace.kernel.org; dmarc=pass (p=quarantine dis=none) header.from=mediatek.com Authentication-Results: smtp.subspace.kernel.org; spf=pass smtp.mailfrom=mediatek.com Authentication-Results: smtp.subspace.kernel.org; dkim=pass (1024-bit key) header.d=mediatek.com header.i=@mediatek.com header.b="Z0awVBZk" X-UUID: f83cbaa691aa11efb88477ffae1fc7a5-20241024 DKIM-Signature: v=1; a=rsa-sha256; q=dns/txt; c=relaxed/relaxed; d=mediatek.com; s=dk; h=Content-Type:MIME-Version:Message-ID:Date:Subject:CC:To:From; bh=3CpmCRaf0iN6t3tO+rXWbvSp6h4e8oWCGaYzYX07O2A=; b=Z0awVBZks7GuVW/SHkBi3mRApiP49nHwGW4yll79KuZnr/qlvqakGKtjlNdfLrqR9qkOMBAOAr50l0IiJbI2/1JqCfNOcnFb5ICOKmk3WukZFEGrSpwN4//RRRNEeduHWVto93JtZnrw0i77p2DfObmsvHqSxPgHuiEnAMUo5+A=; X-CID-P-RULE: Release_Ham X-CID-O-INFO: VERSION:1.1.42,REQID:91de5430-dabc-4fe0-bedd-c4a9f9ab4eb7,IP:0,U RL:0,TC:0,Content:-5,EDM:0,RT:0,SF:0,FILE:0,BULK:0,RULE:Release_Ham,ACTION :release,TS:-5 X-CID-META: VersionHash:b0fcdc3,CLOUDID:438fbd41-8751-41b2-98dd-475503d45150,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: f83cbaa691aa11efb88477ffae1fc7a5-20241024 Received: from mtkmbs11n1.mediatek.inc [(172.21.101.185)] by mailgw01.mediatek.com (envelope-from ) (Generic MTA with TLSv1.2 ECDHE-RSA-AES256-GCM-SHA384 256/256) with ESMTP id 1438409549; Thu, 24 Oct 2024 09:54:56 +0800 Received: from mtkmbs13n2.mediatek.inc (172.21.101.108) by MTKMBS09N2.mediatek.inc (172.21.101.94) with Microsoft SMTP Server (version=TLS1_2, cipher=TLS_ECDHE_RSA_WITH_AES_256_GCM_SHA384) id 15.2.1118.26; Wed, 23 Oct 2024 18:54:55 -0700 Received: from mtksdccf07.mediatek.inc (172.21.84.99) by mtkmbs13n2.mediatek.inc (172.21.101.73) with Microsoft SMTP Server id 15.2.1118.26 via Frontend Transport; Thu, 24 Oct 2024 09:54:55 +0800 From: To: , , , , , CC: , , , , , , , , , , , , , , , , Subject: [PATCH v2] ufs: core: fix another deadlock when rtc update Date: Thu, 24 Oct 2024 09:54:53 +0800 Message-ID: <20241024015453.21684-1-peter.wang@mediatek.com> X-Mailer: git-send-email 2.18.0 Precedence: bulk X-Mailing-List: linux-scsi@vger.kernel.org List-Id: List-Subscribe: List-Unsubscribe: MIME-Version: 1.0 X-MTK: N From: Peter Wang When ufshcd_rtc_work calls ufshcd_rpm_put_sync and the pm's usage_count is 0, it will enter the runtime suspend callback. However, the runtime suspend callback will wait to flush ufshcd_rtc_work, causing a deadlock. Replacing ufshcd_rpm_put_sync with ufshcd_rpm_put can avoid the deadlock. Fixes: 6bf999e0eb41 ("scsi: ufs: core: Add UFS RTC support") Cc: #6.11.x Signed-off-by: Peter Wang Reviewed-by: Bart Van Assche --- drivers/ufs/core/ufshcd.c | 2 +- 1 file changed, 1 insertion(+), 1 deletion(-) diff --git a/drivers/ufs/core/ufshcd.c b/drivers/ufs/core/ufshcd.c index a63dcf48e59d..f5846598d80e 100644 --- a/drivers/ufs/core/ufshcd.c +++ b/drivers/ufs/core/ufshcd.c @@ -8219,7 +8219,7 @@ static void ufshcd_update_rtc(struct ufs_hba *hba) err = ufshcd_query_attr(hba, UPIU_QUERY_OPCODE_WRITE_ATTR, QUERY_ATTR_IDN_SECONDS_PASSED, 0, 0, &val); - ufshcd_rpm_put_sync(hba); + ufshcd_rpm_put(hba); if (err) dev_err(hba->dev, "%s: Failed to update rtc %d\n", __func__, err);