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| author | Jia-Ju Bai <baijiaju1990@gmail.com> | 2018-01-27 18:17:38 +0800 |
|---|---|---|
| committer | Marcel Holtmann <marcel@holtmann.org> | 2018-02-07 09:47:04 +0100 |
| commit | 688d6240e0646a56ff8bdffb2310dcdeca354814 (patch) | |
| tree | ae557ddd6bd9afb7c5e6b5385de0e96ddd42f31f /drivers/bluetooth | |
| parent | 0a21963aacfe88fdbfe6166781d4ccd159197bd6 (diff) | |
| download | linux-688d6240e0646a56ff8bdffb2310dcdeca354814.tar.bz2 | |
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 <baijiaju1990@gmail.com>
Signed-off-by: Marcel Holtmann <marcel@holtmann.org>
Diffstat (limited to 'drivers/bluetooth')
| -rw-r--r-- | drivers/bluetooth/hci_ath.c | 4 |
1 files changed, 2 insertions, 2 deletions
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; |