video: fbdev: pxa3xx-gcu: release the resources correctly in pxa3xx_gcu_probe/remove()

In pxa3xx_gcu_probe(), the sequence of error lable is wrong, it will
leads some resource leaked, so adjust the sequence to handle the error
correctly, and if pxa3xx_gcu_add_buffer() fails, pxa3xx_gcu_free_buffers()
need be called.
In pxa3xx_gcu_remove(), add missing clk_disable_unpreprare().

Signed-off-by: Yang Yingliang <yangyingliang@huawei.com>
Signed-off-by: Helge Deller <deller@gmx.de>

diff --git a/drivers/video/fbdev/pxa3xx-gcu.c b/drivers/video/fbdev/pxa3xx-gcu.c
index 350b313..043cc8f 100644 (file)
--- a/drivers/video/fbdev/pxa3xx-gcu.c
+++ b/drivers/video/fbdev/pxa3xx-gcu.c
@@ -646,6 +646,7 @@ static int pxa3xx_gcu_probe(struct platform_device *pdev)
        for (i = 0; i < 8; i++) {
                ret = pxa3xx_gcu_add_buffer(dev, priv);
                if (ret) {
+                       pxa3xx_gcu_free_buffers(dev, priv);
                        dev_err(dev, "failed to allocate DMA memory\n");
                        goto err_disable_clk;
                }
@@ -662,15 +663,15 @@ static int pxa3xx_gcu_probe(struct platform_device *pdev)
                        SHARED_SIZE, irq);
        return 0;
 
-err_free_dma:
-       dma_free_coherent(dev, SHARED_SIZE,
-                       priv->shared, priv->shared_phys);
+err_disable_clk:
+       clk_disable_unprepare(priv->clk);
 
 err_misc_deregister:
        misc_deregister(&priv->misc_dev);
 
-err_disable_clk:
-       clk_disable_unprepare(priv->clk);
+err_free_dma:
+       dma_free_coherent(dev, SHARED_SIZE,
+                         priv->shared, priv->shared_phys);
 
        return ret;
 }
@@ -683,6 +684,7 @@ static int pxa3xx_gcu_remove(struct platform_device *pdev)
        pxa3xx_gcu_wait_idle(priv);
        misc_deregister(&priv->misc_dev);
        dma_free_coherent(dev, SHARED_SIZE, priv->shared, priv->shared_phys);
+       clk_disable_unprepare(priv->clk);
        pxa3xx_gcu_free_buffers(dev, priv);
 
        return 0;