xiaomi-sm8450/android_kernel_xiaomi_sm8450
1
0
Garpu 0
Kode Masalah Tarik Permintaan Actions Packages Projects Rilis Wiki Kegiatan

tty: Replace ASYNC_INITIALIZED bit and update atomically

Telusuri Sumber 
Replace ASYNC_INITIALIZED bit in the tty_port::flags field with
TTY_PORT_INITIALIZED bit in the tty_port::iflags field. Introduce helpers
tty_port_set_initialized() and tty_port_initialized() to abstract
atomic bit ops.

Note: the transforms for test_and_set_bit() and test_and_clear_bit()
are unnecessary as the state transitions are already mutually exclusive;
the tty lock prevents concurrent open/close/hangup.

Signed-off-by: Peter Hurley <peter@hurleysoftware.com>
Signed-off-by: Greg Kroah-Hartman <gregkh@linuxfoundation.org>
This commit is contained in:
Peter Hurley
2016-04-09 17:53:25 -07:00
committed by Greg Kroah-Hartman
orang tua 80f02d5424
melakukan d41861ca19
27 mengubah file dengan 157 tambahan dan 150 penghapusan
Download Patch File Download Diff File Expand all files Collapse all files

12
drivers/s390/char/con3215.c
Melihat File

@@ -311,8 +311,7 @@ static void raw3215_timeout(unsigned long __data)
*/
static inline void raw3215_try_io(struct raw3215_info *raw)
{
if (!(raw->port.flags & ASYNC_INITIALIZED) ||
tty_port_suspended(&raw->port))
if (!tty_port_initialized(&raw->port) || tty_port_suspended(&raw->port))
return;
if (raw->queued_read != NULL)
raw3215_start_io(raw);
@@ -616,10 +615,10 @@ static int raw3215_startup(struct raw3215_info *raw)
{
unsigned long flags;
if (raw->port.flags & ASYNC_INITIALIZED)
if (tty_port_initialized(&raw->port))
return 0;
raw->line_pos = 0;
raw->port.flags |= ASYNC_INITIALIZED;
tty_port_set_initialized(&raw->port, 1);
spin_lock_irqsave(get_ccwdev_lock(raw->cdev), flags);
raw3215_try_io(raw);
spin_unlock_irqrestore(get_ccwdev_lock(raw->cdev), flags);
@@ -635,8 +634,7 @@ static void raw3215_shutdown(struct raw3215_info *raw)
DECLARE_WAITQUEUE(wait, current);
unsigned long flags;
if (!(raw->port.flags & ASYNC_INITIALIZED) ||
(raw->flags & RAW3215_FIXED))
if (!tty_port_initialized(&raw->port) || (raw->flags & RAW3215_FIXED))
return;
/* Wait for outstanding requests, then free irq */
spin_lock_irqsave(get_ccwdev_lock(raw->cdev), flags);
@@ -650,7 +648,7 @@ static void raw3215_shutdown(struct raw3215_info *raw)
spin_lock_irqsave(get_ccwdev_lock(raw->cdev), flags);
remove_wait_queue(&raw->empty_wait, &wait);
set_current_state(TASK_RUNNING);
raw->port.flags &= ~ASYNC_INITIALIZED;
tty_port_set_initialized(&raw->port, 1);
}
spin_unlock_irqrestore(get_ccwdev_lock(raw->cdev), flags);
}