Input: rotary-encoder - constify platform data pointers

Drivers should not be changing platform data attached to the device
because they do not own it.

Signed-off-by: Dmitry Torokhov <dmitry.torokhov@gmail.com>

1 files changed, 6 insertions, 6 deletions

diff --git a/drivers/input/misc/rotary_encoder.c b/drivers/input/misc/rotary_encoder.c
index e261ad4e6c61..ea51265d4e04 100644
--- a/drivers/input/misc/rotary_encoder.c
+++ b/drivers/input/misc/rotary_encoder.c
@@ -29,7 +29,7 @@
 
 struct rotary_encoder {
         struct input_dev *input;
-        struct rotary_encoder_platform_data *pdata;
+        const struct rotary_encoder_platform_data *pdata;
 
         unsigned int axis;
         unsigned int pos;
@@ -43,7 +43,7 @@ struct rotary_encoder {
         char last_stable;
 };
 
-static int rotary_encoder_get_state(struct rotary_encoder_platform_data *pdata)
+static int rotary_encoder_get_state(const struct rotary_encoder_platform_data *pdata)
 {
         int a = !!gpio_get_value(pdata->gpio_a);
         int b = !!gpio_get_value(pdata->gpio_b);
@@ -56,7 +56,7 @@ static int rotary_encoder_get_state(struct rotary_encoder_platform_data *pdata)
 
 static void rotary_encoder_report_event(struct rotary_encoder *encoder)
 {
-        struct rotary_encoder_platform_data *pdata = encoder->pdata;
+        const struct rotary_encoder_platform_data *pdata = encoder->pdata;
 
         if (pdata->relative_axis) {
                 input_report_rel(encoder->input,
@@ -142,10 +142,10 @@ static irqreturn_t rotary_encoder_half_period_irq(int irq, void *dev_id)
 
 static int __devinit rotary_encoder_probe(struct platform_device *pdev)
 {
-        struct rotary_encoder_platform_data *pdata = pdev->dev.platform_data;
+        struct device *dev = &pdev->dev;
+        const struct rotary_encoder_platform_data *pdata = dev_get_platdata(dev);
         struct rotary_encoder *encoder;
         struct input_dev *input;
-        struct device *dev = &pdev->dev;
         irq_handler_t handler;
         int err;
 
@@ -247,7 +247,7 @@ exit_free_mem:
 static int __devexit rotary_encoder_remove(struct platform_device *pdev)
 {
         struct rotary_encoder *encoder = platform_get_drvdata(pdev);
-        struct rotary_encoder_platform_data *pdata = pdev->dev.platform_data;
+        const struct rotary_encoder_platform_data *pdata = encoder->pdata;
 
         free_irq(encoder->irq_a, encoder);
         free_irq(encoder->irq_b, encoder);