diff options
| author | Peter Hurley <peter@hurleysoftware.com> | 2015-02-24 22:25:00 +0300 |
|---|---|---|
| committer | Greg Kroah-Hartman <gregkh@linuxfoundation.org> | 2015-03-26 18:10:11 +0300 |
| commit | 959801fef94b7ee66ea2c713229637a7e1770890 (patch) | |
| tree | c9b020e008b67662c065aba921044932b9d9071c | |
| parent | d3157b2ca59ceb9ad1b72cad09535a343f315667 (diff) | |
| download | linux-959801fef94b7ee66ea2c713229637a7e1770890.tar.xz | |
serial: core: Add minor field to uart_port
UART drivers that share ttyS namespace cannot trivially compute the
ttyS index from the port->line value since the minor_start may be
offset from minor 64. Further, to do so requires a pointer to the
uart driver since there is no back pointer from uart_port to
uart_driver.
Rather than have UART drivers computing the minor value by themselves,
encapsulate within the serial core at port registration time.
Signed-off-by: Peter Hurley <peter@hurleysoftware.com>
Signed-off-by: Greg Kroah-Hartman <gregkh@linuxfoundation.org>
| -rw-r--r-- | drivers/tty/serial/serial_core.c | 1 | ||||
| -rw-r--r-- | include/linux/serial_core.h | 1 |
2 files changed, 2 insertions, 0 deletions
diff --git a/drivers/tty/serial/serial_core.c b/drivers/tty/serial/serial_core.c index 8379e3fa0162..a373eff44ae8 100644 --- a/drivers/tty/serial/serial_core.c +++ b/drivers/tty/serial/serial_core.c @@ -2682,6 +2682,7 @@ int uart_add_one_port(struct uart_driver *drv, struct uart_port *uport) state->pm_state = UART_PM_STATE_UNDEFINED; uport->cons = drv->cons; + uport->minor = drv->tty_driver->minor_start + uport->line; /* * If this port is a console, then the spinlock is already diff --git a/include/linux/serial_core.h b/include/linux/serial_core.h index b0148e7bcbfa..980170e5a982 100644 --- a/include/linux/serial_core.h +++ b/include/linux/serial_core.h @@ -235,6 +235,7 @@ struct uart_port { const struct uart_ops *ops; unsigned int custom_divisor; unsigned int line; /* port index */ + unsigned int minor; resource_size_t mapbase; /* for ioremap */ struct device *dev; /* parent device */ unsigned char hub6; /* this should be in the 8250 driver */ |