The return value is only ever used as a return value for remove callbacks
of platform drivers. This return value is ignored by the driver core.
(The only effect is an error message, but uart_remove_one_port() already
emitted one in this case.)
So the return value isn't used at all and uart_remove_one_port() can be
changed to return void without any loss. Also this better matches the
Linux device model as remove functions are not supposed to fail.
Signed-off-by: Uwe Kleine-König <u.kleine-koenig@xxxxxxxxxxxxxx>
---
drivers/tty/serial/atmel_serial.c | 5 ++---
drivers/tty/serial/clps711x.c | 4 +++-
drivers/tty/serial/cpm_uart/cpm_uart_core.c | 5 ++++-
drivers/tty/serial/imx.c | 4 +++-
drivers/tty/serial/lantiq.c | 4 +++-
drivers/tty/serial/serial_core.c | 6 +-----
drivers/tty/serial/st-asc.c | 4 +++-
drivers/tty/serial/uartlite.c | 12 ++++--------
drivers/tty/serial/xilinx_uartps.c | 5 ++---
include/linux/serial_core.h | 2 +-
10 files changed, 26 insertions(+), 25 deletions(-)
diff --git a/drivers/tty/serial/atmel_serial.c b/drivers/tty/serial/atmel_serial.c
index 9cd7479b03c0..6e9192f122aa 100644
--- a/drivers/tty/serial/atmel_serial.c
+++ b/drivers/tty/serial/atmel_serial.c
@@ -3006,14 +3006,13 @@ static int atmel_serial_remove(struct platform_device *pdev)
{
struct uart_port *port = platform_get_drvdata(pdev);
struct atmel_uart_port *atmel_port = to_atmel_uart_port(port);
- int ret = 0;
tasklet_kill(&atmel_port->tasklet_rx);
tasklet_kill(&atmel_port->tasklet_tx);
device_init_wakeup(&pdev->dev, 0);
- ret = uart_remove_one_port(&atmel_uart, port);
+ uart_remove_one_port(&atmel_uart, port);
kfree(atmel_port->rx_ring.buf);
@@ -3023,7 +3022,7 @@ static int atmel_serial_remove(struct platform_device *pdev)
pdev->dev.of_node = NULL;
- return ret;
+ return 0;
}
static SIMPLE_DEV_PM_OPS(atmel_serial_pm_ops, atmel_serial_suspend,
diff --git a/drivers/tty/serial/clps711x.c b/drivers/tty/serial/clps711x.c
index e190dce58f46..e49bc4019b50 100644
--- a/drivers/tty/serial/clps711x.c
+++ b/drivers/tty/serial/clps711x.c
@@ -514,7 +514,9 @@ static int uart_clps711x_remove(struct platform_device *pdev)
{
struct clps711x_port *s = platform_get_drvdata(pdev);
- return uart_remove_one_port(&clps711x_uart, &s->port);
+ uart_remove_one_port(&clps711x_uart, &s->port);
+
+ return 0;
}
static const struct of_device_id __maybe_unused clps711x_uart_dt_ids[] = {
diff --git a/drivers/tty/serial/cpm_uart/cpm_uart_core.c b/drivers/tty/serial/cpm_uart/cpm_uart_core.c
index 349e7da643f0..66afa9bea6bf 100644
--- a/drivers/tty/serial/cpm_uart/cpm_uart_core.c
+++ b/drivers/tty/serial/cpm_uart/cpm_uart_core.c
@@ -1431,7 +1431,10 @@ static int cpm_uart_probe(struct platform_device *ofdev)
static int cpm_uart_remove(struct platform_device *ofdev)
{
struct uart_cpm_port *pinfo = platform_get_drvdata(ofdev);
- return uart_remove_one_port(&cpm_reg, &pinfo->port);
+
+ uart_remove_one_port(&cpm_reg, &pinfo->port);
+
+ return 0;
}
static const struct of_device_id cpm_uart_match[] = {
diff --git a/drivers/tty/serial/imx.c b/drivers/tty/serial/imx.c
index c5e17569c3ad..b2bf3cb449f4 100644
--- a/drivers/tty/serial/imx.c
+++ b/drivers/tty/serial/imx.c
@@ -2467,7 +2467,9 @@ static int imx_uart_remove(struct platform_device *pdev)
{
struct imx_port *sport = platform_get_drvdata(pdev);
- return uart_remove_one_port(&imx_uart_uart_driver, &sport->port);
+ uart_remove_one_port(&imx_uart_uart_driver, &sport->port);
+
+ return 0;
}
static void imx_uart_restore_context(struct imx_port *sport)
diff --git a/drivers/tty/serial/lantiq.c b/drivers/tty/serial/lantiq.c
index a58e9277dfad..d413f97f7190 100644
--- a/drivers/tty/serial/lantiq.c
+++ b/drivers/tty/serial/lantiq.c
@@ -889,7 +889,9 @@ static int lqasc_remove(struct platform_device *pdev)
{
struct uart_port *port = platform_get_drvdata(pdev);
- return uart_remove_one_port(&lqasc_reg, port);
+ uart_remove_one_port(&lqasc_reg, port);
+
+ return 0;
}
static const struct ltq_soc_data soc_data_lantiq = {
diff --git a/drivers/tty/serial/serial_core.c b/drivers/tty/serial/serial_core.c
index 54e82f476a2c..4b98d13555c0 100644
--- a/drivers/tty/serial/serial_core.c
+++ b/drivers/tty/serial/serial_core.c
@@ -3154,13 +3154,12 @@ EXPORT_SYMBOL(uart_add_one_port);
* This unhooks (and hangs up) the specified port structure from the core
* driver. No further calls will be made to the low-level code for this port.
*/
-int uart_remove_one_port(struct uart_driver *drv, struct uart_port *uport)
+void uart_remove_one_port(struct uart_driver *drv, struct uart_port *uport)
{
struct uart_state *state = drv->state + uport->line;
struct tty_port *port = &state->port;
struct uart_port *uart_port;
struct tty_struct *tty;
- int ret = 0;
mutex_lock(&port_mutex);
@@ -3176,7 +3175,6 @@ int uart_remove_one_port(struct uart_driver *drv, struct uart_port *uport)
if (!uart_port) {
mutex_unlock(&port->mutex);
- ret = -EINVAL;
goto out;
}
uport->flags |= UPF_DEAD;
@@ -3219,8 +3217,6 @@ int uart_remove_one_port(struct uart_driver *drv, struct uart_port *uport)
mutex_unlock(&port->mutex);
out:
mutex_unlock(&port_mutex);
-
- return ret;
}
EXPORT_SYMBOL(uart_remove_one_port);
diff --git a/drivers/tty/serial/st-asc.c b/drivers/tty/serial/st-asc.c
index 5215e6910f68..dc2f2051435c 100644
--- a/drivers/tty/serial/st-asc.c
+++ b/drivers/tty/serial/st-asc.c
@@ -796,7 +796,9 @@ static int asc_serial_remove(struct platform_device *pdev)
{
struct uart_port *port = platform_get_drvdata(pdev);
- return uart_remove_one_port(&asc_uart_driver, port);
+ uart_remove_one_port(&asc_uart_driver, port);
+
+ return 0;
}
#ifdef CONFIG_PM_SLEEP
diff --git a/drivers/tty/serial/uartlite.c b/drivers/tty/serial/uartlite.c
index 94584e54ebbe..679574893ebe 100644
--- a/drivers/tty/serial/uartlite.c
+++ b/drivers/tty/serial/uartlite.c
@@ -685,18 +685,15 @@ static int ulite_assign(struct device *dev, int id, phys_addr_t base, int irq,
*
* @dev: pointer to device structure
*/
-static int ulite_release(struct device *dev)
+static void ulite_release(struct device *dev)
{
struct uart_port *port = dev_get_drvdata(dev);
- int rc = 0;
if (port) {
- rc = uart_remove_one_port(&ulite_uart_driver, port);
+ uart_remove_one_port(&ulite_uart_driver, port);
dev_set_drvdata(dev, NULL);
port->mapbase = 0;
}
-
- return rc;
}
/**
@@ -900,14 +897,13 @@ static int ulite_remove(struct platform_device *pdev)
{
struct uart_port *port = dev_get_drvdata(&pdev->dev);
struct uartlite_data *pdata = port->private_data;
- int rc;
clk_disable_unprepare(pdata->clk);
- rc = ulite_release(&pdev->dev);
+ ulite_release(&pdev->dev);
pm_runtime_disable(&pdev->dev);
pm_runtime_set_suspended(&pdev->dev);
pm_runtime_dont_use_autosuspend(&pdev->dev);
- return rc;
+ return 0;
}
/* work with hotplug and coldplug */
diff --git a/drivers/tty/serial/xilinx_uartps.c b/drivers/tty/serial/xilinx_uartps.c
index 8e521c69a959..20a751663ef9 100644
--- a/drivers/tty/serial/xilinx_uartps.c
+++ b/drivers/tty/serial/xilinx_uartps.c
@@ -1670,14 +1670,13 @@ static int cdns_uart_remove(struct platform_device *pdev)
{
struct uart_port *port = platform_get_drvdata(pdev);
struct cdns_uart *cdns_uart_data = port->private_data;
- int rc;
/* Remove the cdns_uart port from the serial core */
#ifdef CONFIG_COMMON_CLK
clk_notifier_unregister(cdns_uart_data->uartclk,
&cdns_uart_data->clk_rate_change_nb);
#endif
- rc = uart_remove_one_port(cdns_uart_data->cdns_uart_driver, port);
+ uart_remove_one_port(cdns_uart_data->cdns_uart_driver, port);
port->mapbase = 0;
clk_disable_unprepare(cdns_uart_data->uartclk);
clk_disable_unprepare(cdns_uart_data->pclk);
@@ -1693,7 +1692,7 @@ static int cdns_uart_remove(struct platform_device *pdev)
if (!--instances)
uart_unregister_driver(cdns_uart_data->cdns_uart_driver);
- return rc;
+ return 0;
}
static struct platform_driver cdns_uart_platform_driver = {
diff --git a/include/linux/serial_core.h b/include/linux/serial_core.h
index 66ecec15a1bf..ddcdb5b8523e 100644
--- a/include/linux/serial_core.h
+++ b/include/linux/serial_core.h
@@ -853,7 +853,7 @@ void uart_console_write(struct uart_port *port, const char *s,
int uart_register_driver(struct uart_driver *uart);
void uart_unregister_driver(struct uart_driver *uart);
int uart_add_one_port(struct uart_driver *reg, struct uart_port *port);
-int uart_remove_one_port(struct uart_driver *reg, struct uart_port *port);
+void uart_remove_one_port(struct uart_driver *reg, struct uart_port *port);
bool uart_match_port(const struct uart_port *port1,
const struct uart_port *port2);
--
2.39.2
