提交 64dbee31 编写于 作者: P Peter Hurley 提交者: Greg Kroah-Hartman

serial: core: Remove extra locking in uart_write()

uart_start() only claims the port->lock to call __uart_start(),
which does the actual processing. Eliminate the extra acquire/release
in uart_write(); call __uart_start() directly with port->lock already
held.
Signed-off-by: NPeter Hurley <peter@hurleysoftware.com>
Signed-off-by: NGreg Kroah-Hartman <gregkh@linuxfoundation.org>
上级 2b702b9b
...@@ -537,9 +537,10 @@ static int uart_write(struct tty_struct *tty, ...@@ -537,9 +537,10 @@ static int uart_write(struct tty_struct *tty,
count -= c; count -= c;
ret += c; ret += c;
} }
__uart_start(tty);
spin_unlock_irqrestore(&port->lock, flags); spin_unlock_irqrestore(&port->lock, flags);
uart_start(tty);
return ret; return ret;
} }
......
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