diff options
| author | Peter Hurley <peter@hurleysoftware.com> | 2014-09-10 23:06:26 +0400 |
|---|---|---|
| committer | Greg Kroah-Hartman <gregkh@linuxfoundation.org> | 2014-09-24 08:19:35 +0400 |
| commit | d01f4d181c92877ecc678adce248a30cb7077ff1 (patch) | |
| tree | f4b9a5723be98e63e2b238f8290fd418179a238a /drivers/tty/serial/bfin_uart.c | |
| parent | 317c1360200059a7a8a832294a58409c73b784bf (diff) | |
| download | linux-d01f4d181c92877ecc678adce248a30cb7077ff1.tar.xz | |
serial: core: Privatize tty->hw_stopped
tty->hw_stopped is not used by the tty core and is thread-unsafe;
hw_stopped is a member of a bitfield whose fields are updated
non-atomically and no lock is suitable for serializing updates.
Replace serial core usage of tty->hw_stopped with uport->hw_stopped.
Use int storage which works around Alpha EV4/5 non-atomic byte storage,
since uart_port uses different locks to protect certain fields within the
structure.
Signed-off-by: Peter Hurley <peter@hurleysoftware.com>
Signed-off-by: Greg Kroah-Hartman <gregkh@linuxfoundation.org>
Diffstat (limited to 'drivers/tty/serial/bfin_uart.c')
| -rw-r--r-- | drivers/tty/serial/bfin_uart.c | 14 |
1 files changed, 7 insertions, 7 deletions
diff --git a/drivers/tty/serial/bfin_uart.c b/drivers/tty/serial/bfin_uart.c index dec0fd725d80..fc9fbf3f24a7 100644 --- a/drivers/tty/serial/bfin_uart.c +++ b/drivers/tty/serial/bfin_uart.c @@ -108,22 +108,22 @@ static void bfin_serial_set_mctrl(struct uart_port *port, unsigned int mctrl) static irqreturn_t bfin_serial_mctrl_cts_int(int irq, void *dev_id) { struct bfin_serial_port *uart = dev_id; - unsigned int status = bfin_serial_get_mctrl(&uart->port); + struct uart_port *uport = &uart->port; + unsigned int status = bfin_serial_get_mctrl(uport); #ifdef CONFIG_SERIAL_BFIN_HARD_CTSRTS - struct tty_struct *tty = uart->port.state->port.tty; UART_CLEAR_SCTS(uart); - if (tty->hw_stopped) { + if (uport->hw_stopped) { if (status) { - tty->hw_stopped = 0; - uart_write_wakeup(&uart->port); + uport->hw_stopped = 0; + uart_write_wakeup(uport); } } else { if (!status) - tty->hw_stopped = 1; + uport->hw_stopped = 1; } #endif - uart_handle_cts_change(&uart->port, status & TIOCM_CTS); + uart_handle_cts_change(uport, status & TIOCM_CTS); return IRQ_HANDLED; } |