From 688d6240e0646a56ff8bdffb2310dcdeca354814 Mon Sep 17 00:00:00 2001 From: Jia-Ju Bai Date: Sat, 27 Jan 2018 18:17:38 +0800 Subject: Bluetooth: hci_ath: Replace mdelay with msleep in ath_wakeup_ar3k ath_wakeup_ar3k() is never called from atomic context. It is only called by ath_hci_uart_work() that is only called in ath_open() via INIT_WORK(). All of the above functions do not enter atomic context along the way. Despite never getting called from atomic context, ath_wakeup_ar3k() calls mdelay() for busy wait. That is not necessary and can be replaced with msleep to avoid busy wait. This is found by a static analysis tool named DCNS written by myself. Signed-off-by: Jia-Ju Bai Signed-off-by: Marcel Holtmann --- drivers/bluetooth/hci_ath.c | 4 ++-- 1 file changed, 2 insertions(+), 2 deletions(-) (limited to 'drivers/bluetooth') diff --git a/drivers/bluetooth/hci_ath.c b/drivers/bluetooth/hci_ath.c index 14ae7ee88acb..d568fbd94d6c 100644 --- a/drivers/bluetooth/hci_ath.c +++ b/drivers/bluetooth/hci_ath.c @@ -71,12 +71,12 @@ static int ath_wakeup_ar3k(struct tty_struct *tty) /* Clear RTS first */ tty->driver->ops->tiocmget(tty); tty->driver->ops->tiocmset(tty, 0x00, TIOCM_RTS); - mdelay(20); + msleep(20); /* Set RTS, wake up board */ tty->driver->ops->tiocmget(tty); tty->driver->ops->tiocmset(tty, TIOCM_RTS, 0x00); - mdelay(20); + msleep(20); status = tty->driver->ops->tiocmget(tty); return status; -- cgit