| Message ID | 1590662302-10102-1-git-send-email-zijuhu@codeaurora.org (mailing list archive) |
|---|---|
| State | Superseded |
| Headers | show |
| Series | [v1] bluetooth: hci_qca: Fix suspend/resume functionality failure | expand |
Hi Zijun, On Thu, May 28, 2020 at 06:38:22PM +0800, Zijun Hu wrote: > @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> Please add: Fixes: 41d5b25fed0 ("Bluetooth: hci_qca: add PM support") and add stable@kernel.org to cc: > --- > 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; hdev is not used, please remove > 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; hdev is not used, please remove > 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 >
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);
@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(-)