i2c: sh_mobile: optimize irq entry

We can simply pass the pointer to the private structure to the irq
routine instead of passing the platform device and looking up its
driver_data.

Signed-off-by: Wolfram Sang <[e-mail]>
Acked-by: Geert Uytterhoeven <[e-mail]>
Signed-off-by: Wolfram Sang <[e-mail]>

drivers/i2c/busses/i2c-sh_mobile.c

···
 
 static irqreturn_t sh_mobile_i2c_isr(int irq, void *dev_id)
 {
-	struct platform_device *dev = dev_id;
-	struct sh_mobile_i2c_data *pd = platform_get_drvdata(dev);
+	struct sh_mobile_i2c_data *pd = dev_id;
 	unsigned char sr;
 	int wakeup = 0;
 
···
 	}
 }
 
-static int sh_mobile_i2c_hook_irqs(struct platform_device *dev)
+static int sh_mobile_i2c_hook_irqs(struct platform_device *dev, struct sh_mobile_i2c_data *pd)
 {
 	struct resource *res;
 	resource_size_t n;
···
 	while ((res = platform_get_resource(dev, IORESOURCE_IRQ, k))) {
 		for (n = res->start; n <= res->end; n++) {
 			ret = devm_request_irq(&dev->dev, n, sh_mobile_i2c_isr,
-					  0, dev_name(&dev->dev), dev);
+					  0, dev_name(&dev->dev), pd);
 			if (ret) {
 				dev_err(&dev->dev, "cannot request IRQ %pa\n", &n);
 				return ret;
···
 		return PTR_ERR(pd->clk);
 	}
 
-	ret = sh_mobile_i2c_hook_irqs(dev);
+	ret = sh_mobile_i2c_hook_irqs(dev, pd);
 	if (ret)
 		return ret;