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Bluetooth: hci_qca: Skip serdev wait when no transfer is pending 

qca_suspend() calls serdev_device_wait_until_sent() regardless of
whether a transfer is pending. While it does no active harm since
the function should return immediately it makes the code more
confusing. Add a flag to track whether a transfer is pending and
only call serdev_device_wait_until_sent() is needed.

Signed-off-by: Matthias Kaehlcke <mka@chromium.org>
Reviewed-by: Abhishek Pandit-Subedi <abhishekpandit@chromium.org>
Signed-off-by: Marcel Holtmann <marcel@holtmann.org>
This commit is contained in:
Matthias Kaehlcke 2020-06-05 11:46:10 -07:00 committed by Marcel Holtmann
parent eff981f657
commit e2a119cd84
1 changed files with 6 additions and 2 deletions
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8
drivers/bluetooth/hci_qca.c
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@ -2048,6 +2048,7 @@ static int __maybe_unused qca_suspend(struct device *dev)
struct hci_uart *hu = &qcadev->serdev_hu;
struct qca_data *qca = hu->priv;
unsigned long flags;
bool tx_pending = false;
int ret = 0;
u8 cmd;
@ -2081,6 +2082,7 @@ static int __maybe_unused qca_suspend(struct device *dev)
qca->tx_ibs_state = HCI_IBS_TX_ASLEEP;
qca->ibs_sent_slps++;
tx_pending = true;
break;
case HCI_IBS_TX_ASLEEP:
@ -2097,8 +2099,10 @@ static int __maybe_unused qca_suspend(struct device *dev)
if (ret < 0)
goto error;
serdev_device_wait_until_sent(hu->serdev,
msecs_to_jiffies(CMD_TRANS_TIMEOUT_MS));
if (tx_pending) {
serdev_device_wait_until_sent(hu->serdev,
msecs_to_jiffies(CMD_TRANS_TIMEOUT_MS));
}
/* Wait for HCI_IBS_SLEEP_IND sent by device to indicate its Tx is going
* to sleep, so that the packet does not wake the system later.