serial: uartps: Do not use static struct uart_driver out of probe()

cdns_uart_suspend()/resume() and remove() are using static reference
to struct uart_driver. Assign this reference to private data structure
as preparation step for dynamic struct uart_driver allocation.

Signed-off-by: Michal Simek <michal.simek@xilinx.com>
Signed-off-by: Greg Kroah-Hartman <gregkh@linuxfoundation.org>

diff --git a/drivers/tty/serial/xilinx_uartps.c b/drivers/tty/serial/xilinx_uartps.c
index 251d061c00fe184774b62a1a308479db15dead8e..12d6033df1442b917f1d91d966c6a70cf68c017e 100644 (file)
--- a/drivers/tty/serial/xilinx_uartps.c
+++ b/drivers/tty/serial/xilinx_uartps.c
@@ -180,6 +180,7 @@ MODULE_PARM_DESC(rx_timeout, "Rx timeout, 1-255");
  * @port:              Pointer to the UART port
  * @uartclk:           Reference clock
  * @pclk:              APB clock
+ * @cdns_uart_driver:  Pointer to UART driver
  * @baud:              Current baud rate
  * @clk_rate_change_nb:        Notifier block for clock changes
  * @quirks:            Flags for RXBS support.
@@ -188,6 +189,7 @@ struct cdns_uart {
        struct uart_port        *port;
        struct clk              *uartclk;
        struct clk              *pclk;
+       struct uart_driver      *cdns_uart_driver;
        unsigned int            baud;
        struct notifier_block   clk_rate_change_nb;
        u32                     quirks;
@@ -1273,6 +1275,7 @@ static struct uart_driver cdns_uart_uart_driver = {
 static int cdns_uart_suspend(struct device *device)
 {
        struct uart_port *port = dev_get_drvdata(device);
+       struct cdns_uart *cdns_uart = port->private_data;
        int may_wake;
 
        may_wake = device_may_wakeup(device);
@@ -1296,7 +1299,7 @@ static int cdns_uart_suspend(struct device *device)
         * Call the API provided in serial_core.c file which handles
         * the suspend.
         */
-       return uart_suspend_port(&cdns_uart_uart_driver, port);
+       return uart_suspend_port(cdns_uart->cdns_uart_driver, port);
 }
 
 /**
@@ -1308,6 +1311,7 @@ static int cdns_uart_suspend(struct device *device)
 static int cdns_uart_resume(struct device *device)
 {
        struct uart_port *port = dev_get_drvdata(device);
+       struct cdns_uart *cdns_uart = port->private_data;
        unsigned long flags = 0;
        u32 ctrl_reg;
        int may_wake;
@@ -1315,8 +1319,6 @@ static int cdns_uart_resume(struct device *device)
        may_wake = device_may_wakeup(device);
 
        if (console_suspend_enabled && !may_wake) {
-               struct cdns_uart *cdns_uart = port->private_data;
-
                clk_enable(cdns_uart->pclk);
                clk_enable(cdns_uart->uartclk);
 
@@ -1350,7 +1352,7 @@ static int cdns_uart_resume(struct device *device)
                spin_unlock_irqrestore(&port->lock, flags);
        }
 
-       return uart_resume_port(&cdns_uart_uart_driver, port);
+       return uart_resume_port(cdns_uart->cdns_uart_driver, port);
 }
 #endif /* ! CONFIG_PM_SLEEP */
 static int __maybe_unused cdns_runtime_suspend(struct device *dev)
@@ -1414,6 +1416,8 @@ static int cdns_uart_probe(struct platform_device *pdev)
        if (!port)
                return -ENOMEM;
 
+       cdns_uart_data->cdns_uart_driver = &cdns_uart_uart_driver;
+
        match = of_match_node(cdns_uart_of_match, pdev->dev.of_node);
        if (match && match->data) {
                const struct cdns_platform_data *data = match->data;
@@ -1571,7 +1575,7 @@ static int cdns_uart_remove(struct platform_device *pdev)
        clk_notifier_unregister(cdns_uart_data->uartclk,
                        &cdns_uart_data->clk_rate_change_nb);
 #endif
-       rc = uart_remove_one_port(&cdns_uart_uart_driver, port);
+       rc = 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);