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Subject[LINUX PATCHv3 3/9] serial-uartlite: Do not use static struct uart_driver out of probe()
Date
From: Shubhrajyoti Datta <shubhrajyoti.datta@xilinx.com>

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

Signed-off-by: Shubhrajyoti Datta <shubhrajyoti.datta@xilinx.com>
Signed-off-by: Michal Simek <michal.simek@xilinx.com>
---
drivers/tty/serial/uartlite.c | 11 ++++++++---
1 file changed, 8 insertions(+), 3 deletions(-)

diff --git a/drivers/tty/serial/uartlite.c b/drivers/tty/serial/uartlite.c
index 441a216..64c7248 100644
--- a/drivers/tty/serial/uartlite.c
+++ b/drivers/tty/serial/uartlite.c
@@ -63,6 +63,7 @@ static struct uart_port *console_port;
struct uartlite_data {
const struct uartlite_reg_ops *reg_ops;
struct clk *clk;
+ struct uart_driver *ulite_uart_driver;
};

struct uartlite_reg_ops {
@@ -691,10 +692,11 @@ static int ulite_assign(struct device *dev, int id, u32 base, int irq,
static int ulite_release(struct device *dev)
{
struct uart_port *port = dev_get_drvdata(dev);
+ struct uartlite_data *pdata = port->private_data;
int rc = 0;

if (port) {
- rc = uart_remove_one_port(&ulite_uart_driver, port);
+ rc = uart_remove_one_port(pdata->ulite_uart_driver, port);
dev_set_drvdata(dev, NULL);
port->mapbase = 0;
}
@@ -711,9 +713,10 @@ static int ulite_release(struct device *dev)
static int __maybe_unused ulite_suspend(struct device *dev)
{
struct uart_port *port = dev_get_drvdata(dev);
+ struct uartlite_data *pdata = port->private_data;

if (port)
- uart_suspend_port(&ulite_uart_driver, port);
+ uart_suspend_port(pdata->ulite_uart_driver, port);

return 0;
}
@@ -727,9 +730,10 @@ static int __maybe_unused ulite_suspend(struct device *dev)
static int __maybe_unused ulite_resume(struct device *dev)
{
struct uart_port *port = dev_get_drvdata(dev);
+ struct uartlite_data *pdata = port->private_data;

if (port)
- uart_resume_port(&ulite_uart_driver, port);
+ uart_resume_port(pdata->ulite_uart_driver, port);

return 0;
}
@@ -804,6 +808,7 @@ static int ulite_probe(struct platform_device *pdev)
pdata->clk = NULL;
}

+ pdata->ulite_uart_driver = &ulite_uart_driver;
ret = clk_prepare_enable(pdata->clk);
if (ret) {
dev_err(&pdev->dev, "Failed to prepare clock\n");
--
2.1.1
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