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 <wsa+renesas@sang-engineering.com>
Acked-by: Geert Uytterhoeven <geert+renesas@glider.be>
Signed-off-by: Wolfram Sang <wsa@the-dreams.de>

diff --git a/drivers/i2c/busses/i2c-sh_mobile.c b/drivers/i2c/busses/i2c-sh_mobile.c
index c7f36c1..a758ccc 100644 (file)
--- a/drivers/i2c/busses/i2c-sh_mobile.c
+++ b/drivers/i2c/busses/i2c-sh_mobile.c
@@ -466,8 +466,7 @@ static int sh_mobile_i2c_isr_rx(struct sh_mobile_i2c_data *pd)
 
 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;
 
@@ -804,7 +803,7 @@ static void sh_mobile_i2c_release_dma(struct sh_mobile_i2c_data *pd)
        }
 }
 
-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;
@@ -813,7 +812,7 @@ static int sh_mobile_i2c_hook_irqs(struct platform_device *dev)
        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;
@@ -844,7 +843,7 @@ static int sh_mobile_i2c_probe(struct platform_device *dev)
                return PTR_ERR(pd->clk);
        }
 
-       ret = sh_mobile_i2c_hook_irqs(dev);
+       ret = sh_mobile_i2c_hook_irqs(dev, pd);
        if (ret)
                return ret;