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Message-ID: <Pine.LNX.4.64.1106020748020.22932@ask.diku.dk>
Date: Thu, 2 Jun 2011 07:48:50 +0200 (CEST)
From: Julia Lawall <julia@...u.dk>
To: David Miller <davem@...emloft.net>
Cc: joe@...ches.com, wg@...ndegger.com,
kernel-janitors@...r.kernel.org, socketcan-core@...ts.berlios.de,
netdev@...r.kernel.org, linux-kernel@...r.kernel.org, wharms@....de
Subject: Re: [PATCH 4/10] drivers/net/can/flexcan.c: add missing clk_put
From: Julia Lawall <julia@...u.dk>
The failed_get label is used after the call to clk_get has succeeded, so it
should be moved up above the call to clk_put.
The failed_req labels doesn't do anything different than failed_get, so
delete it.
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@...u.dk>
---
drivers/net/can/flexcan.c | 5 ++---
1 file changed, 2 insertions(+), 3 deletions(-)
diff --git a/drivers/net/can/flexcan.c b/drivers/net/can/flexcan.c
index d499056..1767811 100644
--- a/drivers/net/can/flexcan.c
+++ b/drivers/net/can/flexcan.c
@@ -923,7 +923,7 @@ static int __devinit flexcan_probe(struct platform_device *pdev)
mem_size = resource_size(mem);
if (!request_mem_region(mem->start, mem_size, pdev->name)) {
err = -EBUSY;
- goto failed_req;
+ goto failed_get;
}
base = ioremap(mem->start, mem_size);
@@ -977,9 +977,8 @@ static int __devinit flexcan_probe(struct platform_device *pdev)
iounmap(base);
failed_map:
release_mem_region(mem->start, mem_size);
- failed_req:
- clk_put(clk);
failed_get:
+ clk_put(clk);
failed_clock:
return err;
}
--
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