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[ARM] 3523/1: Serial core pm_state

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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>
This commit is contained in:
Andrew Victor
2006-05-16 11:28:49 +01:00
committed by Russell King
parent c4694c76ce
commit 1281e36027
1 changed files with 6 additions and 3 deletions
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3
drivers/serial/serial_core.c
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@@ -1907,10 +1907,13 @@ uart_set_options(struct uart_port *port, struct console *co,
static void uart_change_pm(struct uart_state *state, int pm_state) static void uart_change_pm(struct uart_state *state, int pm_state)
{ {
struct uart_port *port = state->port; struct uart_port *port = state->port;
if (state->pm_state != pm_state) {
if (port->ops->pm) if (port->ops->pm)
port->ops->pm(port, pm_state, state->pm_state); port->ops->pm(port, pm_state, state->pm_state);
state->pm_state = pm_state; state->pm_state = pm_state;
} }
}
int uart_suspend_port(struct uart_driver *drv, struct uart_port *port) int uart_suspend_port(struct uart_driver *drv, struct uart_port *port)
{ {