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From: Zijun Hu <zijuhu@codeaurora.org>
To: marcel@holtmann.org, johan.hedberg@gmail.com
Cc: linux-kernel@vger.kernel.org, linux-bluetooth@vger.kernel.org,
	linux-arm-msm@vger.kernel.org, bgodavar@codeaurora.org,
	c-hbandi@codeaurora.org, hemantg@codeaurora.org,
	mka@chromium.org, rjliao@codeaurora.org, zijuhu@codeaurora.org
Subject: [PATCH v1] bluetooth: hci_qca: Fix suspend/resume functionality failure
Date: Thu, 28 May 2020 18:38:22 +0800	[thread overview]
Message-ID: <1590662302-10102-1-git-send-email-zijuhu@codeaurora.org> (raw)

@dev parameter of qca_suspend()/qca_resume() represents
serdev_device, but it is mistook for hci_dev and causes
succedent unexpected memory access.

Fix by taking @dev as serdev_device.

Signed-off-by: Zijun Hu <zijuhu@codeaurora.org>
---
 drivers/bluetooth/hci_qca.c | 12 ++++++++----
 1 file changed, 8 insertions(+), 4 deletions(-)

diff --git a/drivers/bluetooth/hci_qca.c b/drivers/bluetooth/hci_qca.c
index e4a6823..c159161 100644
--- a/drivers/bluetooth/hci_qca.c
+++ b/drivers/bluetooth/hci_qca.c
@@ -1977,8 +1977,10 @@ static void qca_serdev_remove(struct serdev_device *serdev)
 
 static int __maybe_unused qca_suspend(struct device *dev)
 {
-	struct hci_dev *hdev = container_of(dev, struct hci_dev, dev);
-	struct hci_uart *hu = hci_get_drvdata(hdev);
+	struct serdev_device *serdev = to_serdev_device(dev);
+	struct qca_serdev *qcadev = serdev_device_get_drvdata(serdev);
+	struct hci_uart *hu = &qcadev->serdev_hu;
+	struct hci_dev *hdev __maybe_unused = hu->hdev;
 	struct qca_data *qca = hu->priv;
 	unsigned long flags;
 	int ret = 0;
@@ -2057,8 +2059,10 @@ static int __maybe_unused qca_suspend(struct device *dev)
 
 static int __maybe_unused qca_resume(struct device *dev)
 {
-	struct hci_dev *hdev = container_of(dev, struct hci_dev, dev);
-	struct hci_uart *hu = hci_get_drvdata(hdev);
+	struct serdev_device *serdev = to_serdev_device(dev);
+	struct qca_serdev *qcadev = serdev_device_get_drvdata(serdev);
+	struct hci_uart *hu = &qcadev->serdev_hu;
+	struct hci_dev *hdev __maybe_unused = hu->hdev;
 	struct qca_data *qca = hu->priv;
 
 	clear_bit(QCA_SUSPENDING, &qca->flags);
-- 
The Qualcomm Innovation Center, Inc. is a member of the Code Aurora Forum, a Linux Foundation Collaborative Project


             reply	other threads:[~2020-05-28 10:38 UTC|newest]

Thread overview: 2+ messages / expand[flat|nested]  mbox.gz  Atom feed  top
2020-05-28 10:38 Zijun Hu [this message]
2020-05-28 16:16 ` [PATCH v1] bluetooth: hci_qca: Fix suspend/resume functionality failure Matthias Kaehlcke

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