[PATCH 6/10] drivers/char/hw_random/nomadik-rng.c: add missing clk_put

Julia Lawall
2011-06-01T17:10:09Z

From: Julia Lawall <julia@diku.dk>

Jump to the end of the function for the clk_disable and clk_put rather than
returning directly.

A simplified version of the semantic match that finds this problem is as
follows: (http://coccinelle.lip6.fr/)

// <smpl>
@r exists@
expression e1,e2;
statement S;
@@

e1 = clk_get@p1(...);
... when != e1 = e2
when != clk_put(e1)
when any
if (...) { ... when != clk_put(e1)
when != if (...) { ... clk_put(e1) ... }
* return@p3 ...;
} else S
// </smpl>

Signed-off-by: Julia Lawall <julia@diku.dk>

---
drivers/char/hw_random/nomadik-rng.c | 3 ++-
1 file changed, 2 insertions(+), 1 deletion(-)

diff --git a/drivers/char/hw_random/nomadik-rng.c b/drivers/char/hw_random/nomadik-rng.c
index dd1d143..52e08ca 100644
--- a/drivers/char/hw_random/nomadik-rng.c
+++ b/drivers/char/hw_random/nomadik-rng.c
@@ -55,7 +55,7 @@ static int nmk_rng_probe(struct amba_device *dev, const struct amba_id *id)

ret = amba_request_regions(dev, dev->dev.init_name);
if (ret)
- return ret;
+ goto out_clk;
ret = -ENOMEM;
base = ioremap(dev->res.start, resource_size(&dev->res));
if (!base)
@@ -70,6 +70,7 @@ out_unmap:
iounmap(base);
out_release:
amba_release_regions(dev);
+out_clk:
clk_disable(rng_clk);
clk_put(rng_clk);
return ret;