[PATCH] ARM: etm: add missing misc_deregister() on probe error and remove

[Wei Yongjun]

From: Wei Yongjun <yongjun_...@trendmicro.com.cn>

Add the missing misc_deregister() on probe error and remove.

Signed-off-by: Wei Yongjun <yongjun_...@trendmicro.com.cn>
---
 arch/arm/kernel/etm.c | 6 +++++-
 1 file changed, 5 insertions(+), 1 deletion(-)

diff --git a/arch/arm/kernel/etm.c b/arch/arm/kernel/etm.c
index 8ff0ecd..d0b7426 100644
--- a/arch/arm/kernel/etm.c
+++ b/arch/arm/kernel/etm.c
@@ -365,7 +365,8 @@ static int etb_probe(struct amba_device *dev, const struct 
amba_id *id)
        t->emu_clk = clk_get(&dev->dev, "emu_src_ck");
        if (IS_ERR(t->emu_clk)) {
                dev_dbg(&dev->dev, "Failed to obtain emu_src_ck.\n");
-               return -EFAULT;
+               ret = PTR_ERR(t->emu_clk);
+               goto out_dereg;
        }
 
        clk_enable(t->emu_clk);
@@ -384,6 +385,8 @@ static int etb_probe(struct amba_device *dev, const struct 
amba_id *id)
 out:
        return ret;
 
+out_dereg:
+       misc_deregister(&etb_miscdev);
 out_unmap:
        amba_set_drvdata(dev, NULL);
        iounmap(t->etb_regs);
@@ -398,6 +401,7 @@ static int etb_remove(struct amba_device *dev)
 {
        struct tracectx *t = amba_get_drvdata(dev);
 
+       misc_deregister(&etb_miscdev);
        amba_set_drvdata(dev, NULL);
 
        iounmap(t->etb_regs);

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