3.13.11-ckt22 -stable review patch. If anyone has any objections, please let
me know.
------------------
From: Michal Simek <michal.si...@xilinx.com>
commit 5c90c07b98c02198d9777a7c4f3047b0a94bf7ed upstream.
For systems with CONFIG_SERIAL_OF_PLATFORM=y and device_type =
"serial"; property in DT of_serial.c driver maps and unmaps IRQ (because
driver probe fails). Then a driver is called but irq mapping is not
created that's why driver is failing again in again on request_irq().
Based on this use platform_get_irq() instead of platform_get_resource()
which is doing irq_desc allocation and driver itself can request IRQ.
Fix both xilinx serial drivers in the tree.
Signed-off-by: Michal Simek <michal.si...@xilinx.com>
Signed-off-by: Greg Kroah-Hartman <gre...@linuxfoundation.org>
[ kamal: backport to 3.13-stable: context ]
Signed-off-by: Kamal Mostafa <ka...@canonical.com>
---
drivers/tty/serial/uartlite.c | 11 ++++++-----
drivers/tty/serial/xilinx_uartps.c | 12 ++++++------
2 files changed, 12 insertions(+), 11 deletions(-)
diff --git a/drivers/tty/serial/uartlite.c b/drivers/tty/serial/uartlite.c
index 5f90ef2..0de299c 100644
--- a/drivers/tty/serial/uartlite.c
+++ b/drivers/tty/serial/uartlite.c
@@ -629,7 +629,8 @@ MODULE_DEVICE_TABLE(of, ulite_of_match);
static int ulite_probe(struct platform_device *pdev)
{
- struct resource *res, *res2;
+ struct resource *res;
+ int irq;
int id = pdev->id;
#ifdef CONFIG_OF
const __be32 *prop;
@@ -643,11 +644,11 @@ static int ulite_probe(struct platform_device *pdev)
if (!res)
return -ENODEV;
- res2 = platform_get_resource(pdev, IORESOURCE_IRQ, 0);
- if (!res2)
- return -ENODEV;
+ irq = platform_get_irq(pdev, 0);
+ if (irq <= 0)
+ return -ENXIO;
- return ulite_assign(&pdev->dev, id, res->start, res2->start);
+ return ulite_assign(&pdev->dev, id, res->start, irq);
}
static int ulite_remove(struct platform_device *pdev)
diff --git a/drivers/tty/serial/xilinx_uartps.c
b/drivers/tty/serial/xilinx_uartps.c
index f619ad5..a3a57c9 100644
--- a/drivers/tty/serial/xilinx_uartps.c
+++ b/drivers/tty/serial/xilinx_uartps.c
@@ -1340,9 +1340,9 @@ static SIMPLE_DEV_PM_OPS(xuartps_dev_pm_ops,
xuartps_suspend, xuartps_resume);
**/
static int xuartps_probe(struct platform_device *pdev)
{
- int rc;
+ int rc, irq;
struct uart_port *port;
- struct resource *res, *res2;
+ struct resource *res;
struct xuartps *xuartps_data;
xuartps_data = devm_kzalloc(&pdev->dev, sizeof(*xuartps_data),
@@ -1378,9 +1378,9 @@ static int xuartps_probe(struct platform_device *pdev)
goto err_out_clk_disable;
}
- res2 = platform_get_resource(pdev, IORESOURCE_IRQ, 0);
- if (!res2) {
- rc = -ENODEV;
+ irq = platform_get_irq(pdev, 0);
+ if (irq <= 0) {
+ rc = -ENXIO;
goto err_out_clk_disable;
}
@@ -1405,7 +1405,7 @@ static int xuartps_probe(struct platform_device *pdev)
* and triggers invocation of the config_port() entry point.
*/
port->mapbase = res->start;
- port->irq = res2->start;
+ port->irq = irq;
port->dev = &pdev->dev;
port->uartclk = clk_get_rate(xuartps_data->refclk);
port->private_data = xuartps_data;
--
1.9.1
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