From patchwork Wed Dec 1 18:02:46 2021 Content-Type: text/plain; charset="utf-8" MIME-Version: 1.0 Content-Transfer-Encoding: 7bit X-Patchwork-Submitter: Sean Wang X-Patchwork-Id: 12650539 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 E3EE5C433F5 for ; Wed, 1 Dec 2021 18:02:54 +0000 (UTC) Received: (majordomo@vger.kernel.org) by vger.kernel.org via listexpand id S238402AbhLASGP (ORCPT ); Wed, 1 Dec 2021 13:06:15 -0500 Received: from mailgw02.mediatek.com ([210.61.82.184]:33596 "EHLO mailgw02.mediatek.com" rhost-flags-OK-FAIL-OK-FAIL) by vger.kernel.org with ESMTP id S229975AbhLASGO (ORCPT ); Wed, 1 Dec 2021 13:06:14 -0500 X-UUID: 1b5f587df81e40588dc5b9256234ba6a-20211202 X-UUID: 1b5f587df81e40588dc5b9256234ba6a-20211202 Received: from mtkcas10.mediatek.inc [(172.21.101.39)] by mailgw02.mediatek.com (envelope-from ) (Generic MTA with TLSv1.2 ECDHE-RSA-AES256-SHA384 256/256) with ESMTP id 1515505834; Thu, 02 Dec 2021 02:02:51 +0800 Received: from mtkcas10.mediatek.inc (172.21.101.39) by mtkmbs10n1.mediatek.inc (172.21.101.34) with Microsoft SMTP Server (version=TLS1_2, cipher=TLS_ECDHE_RSA_WITH_AES_256_CBC_SHA384) id 15.2.792.15; Thu, 2 Dec 2021 02:02:49 +0800 Received: from mtkswgap22.mediatek.inc (172.21.77.33) by mtkcas10.mediatek.inc (172.21.101.73) with Microsoft SMTP Server id 15.0.1497.2 via Frontend Transport; Thu, 2 Dec 2021 02:02:49 +0800 From: To: , CC: , , , , , , , , , , , , , , , , , , , , , , , , , , , Mark-yw Chen Subject: [PATCH v2 1/2] Bluetooth: Bluetooth: btmtksdio: handle runtime pm only when sdio_func is available Date: Thu, 2 Dec 2021 02:02:46 +0800 Message-ID: <73960845c299e2cd22c11b84014ff6ba4758e9bb.1638381385.git.objelf@gmail.com> X-Mailer: git-send-email 1.7.9.5 MIME-Version: 1.0 X-MTK: N Precedence: bulk List-ID: X-Mailing-List: linux-bluetooth@vger.kernel.org From: Sean Wang Runtime pm ops is not aware the sdio_func status that is probably being disabled by btmtksdio_close. Thus, we are only able to access the sdio_func for the runtime pm operations only when the sdio_func is available. Fixes: 7f3c563c575e7 ("Bluetooth: btmtksdio: Add runtime PM support to SDIO based Bluetooth") Co-developed-by: Mark-yw Chen Signed-off-by: Mark-yw Chen Signed-off-by: Sean Wang --- v2: not check HCI_RUNNING from a driver, use an internal flag instead --- drivers/bluetooth/btmtksdio.c | 10 ++++++++++ 1 file changed, 10 insertions(+) diff --git a/drivers/bluetooth/btmtksdio.c b/drivers/bluetooth/btmtksdio.c index d9cf0c492e29..fc6317e519e9 100644 --- a/drivers/bluetooth/btmtksdio.c +++ b/drivers/bluetooth/btmtksdio.c @@ -99,6 +99,7 @@ MODULE_DEVICE_TABLE(sdio, btmtksdio_table); #define BTMTKSDIO_TX_WAIT_VND_EVT 1 #define BTMTKSDIO_HW_TX_READY 2 +#define BTMTKSDIO_FUNC_ENABLED 3 struct mtkbtsdio_hdr { __le16 len; @@ -539,6 +540,8 @@ static int btmtksdio_open(struct hci_dev *hdev) if (err < 0) goto err_release_host; + set_bit(BTMTKSDIO_FUNC_ENABLED, &bdev->tx_state); + /* Get ownership from the device */ sdio_writel(bdev->func, C_FW_OWN_REQ_CLR, MTK_REG_CHLPCR, &err); if (err < 0) @@ -640,6 +643,7 @@ static int btmtksdio_close(struct hci_dev *hdev) if (err < 0) bt_dev_err(bdev->hdev, "Cannot return ownership to device"); + clear_bit(BTMTKSDIO_FUNC_ENABLED, &bdev->tx_state); sdio_disable_func(bdev->func); sdio_release_host(bdev->func); @@ -1058,6 +1062,9 @@ static int btmtksdio_runtime_suspend(struct device *dev) if (!bdev) return 0; + if (!test_bit(BTMTKSDIO_FUNC_ENABLED, &bdev->tx_state)) + return 0; + sdio_claim_host(bdev->func); sdio_writel(bdev->func, C_FW_OWN_REQ_SET, MTK_REG_CHLPCR, &err); @@ -1085,6 +1092,9 @@ static int btmtksdio_runtime_resume(struct device *dev) if (!bdev) return 0; + if (!test_bit(BTMTKSDIO_FUNC_ENABLED, &bdev->tx_state)) + return 0; + sdio_claim_host(bdev->func); sdio_writel(bdev->func, C_FW_OWN_REQ_CLR, MTK_REG_CHLPCR, &err);