diff options
| author | Andrew Victor <andrew@sanpeople.com> | 2006-05-16 14:28:49 +0400 |
|---|---|---|
| committer | Russell King <rmk+kernel@arm.linux.org.uk> | 2006-05-16 14:28:49 +0400 |
| commit | 1281e36027a9119356bd93b5e7853c72c35dd462 (patch) | |
| tree | c10b62b061a3a3f74a1e94ac539345ebaf8708ed /drivers/serial | |
| parent | c4694c76ce28dd7e415b4f3014d8c6e580b5f3d2 (diff) | |
| download | linux-1281e36027a9119356bd93b5e7853c72c35dd462.tar.xz | |
[ARM] 3523/1: Serial core pm_state
Patch from Andrew Victor
The serial_core already manages the power state of the UARTs, and
therefore it shouldn't suspend a UART which was previously suspended.
This patch modifies serial_core only call the UART-specific
power-management function if the PM state is actually changing.
Signed-off-by: Andrew Victor <andrew@sanpeople.com>
Signed-off-by: Russell King <rmk+kernel@arm.linux.org.uk>
Diffstat (limited to 'drivers/serial')
| -rw-r--r-- | drivers/serial/serial_core.c | 9 |
1 files changed, 6 insertions, 3 deletions
diff --git a/drivers/serial/serial_core.c b/drivers/serial/serial_core.c index aeb8153ccf24..17839e753e4c 100644 --- a/drivers/serial/serial_core.c +++ b/drivers/serial/serial_core.c @@ -1907,9 +1907,12 @@ uart_set_options(struct uart_port *port, struct console *co, static void uart_change_pm(struct uart_state *state, int pm_state) { struct uart_port *port = state->port; - if (port->ops->pm) - port->ops->pm(port, pm_state, state->pm_state); - state->pm_state = pm_state; + + if (state->pm_state != pm_state) { + if (port->ops->pm) + port->ops->pm(port, pm_state, state->pm_state); + state->pm_state = pm_state; + } } int uart_suspend_port(struct uart_driver *drv, struct uart_port *port) |