[PATCH -next 08/10] serial: core: Colocate crucial structure linkage

From: Peter Hurley
Date: Thu Oct 16 2014 - 16:56:51 EST


The key function of uart_add_one_port() is to cross-reference the
UART driver's port structure with the serial core's state table;
keep the assignments together and document this crucial association.

Signed-off-by: Peter Hurley <peter@xxxxxxxxxxxxxxxxxx>
---
drivers/tty/serial/serial_core.c | 5 +++--
1 file changed, 3 insertions(+), 2 deletions(-)

diff --git a/drivers/tty/serial/serial_core.c b/drivers/tty/serial/serial_core.c
index 676c03a..e04ae58 100644
--- a/drivers/tty/serial/serial_core.c
+++ b/drivers/tty/serial/serial_core.c
@@ -2594,11 +2594,12 @@ int uart_add_one_port(struct uart_driver *drv, struct uart_port *uport)
goto out;
}

+ /* Link the port to the driver state table and vice versa */
state->uart_port = uport;
- state->pm_state = UART_PM_STATE_UNDEFINED;
+ uport->state = state;

+ state->pm_state = UART_PM_STATE_UNDEFINED;
uport->cons = drv->cons;
- uport->state = state;

/*
* If this port is a console, then the spinlock is already
--
2.1.1

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