diff options
| author | Julia Lawall <julia@diku.dk> | 2011-06-06 18:59:02 -0700 |
|---|---|---|
| committer | Dave Jones <davej@redhat.com> | 2011-07-13 18:29:54 -0400 |
| commit | 4911ca1031c2ade225fdf22cc872bc121c2c2ec5 (patch) | |
| tree | f3e949229f7b1c112cd1c70cd3ebeb18df138ef4 | |
| parent | 15964d388528c1dbb672027c8003fe7e81630a35 (diff) | |
[CPUFREQ] s5pv210-cpufreq.c: Add missing clk_put
The successive calls to clk_get each call clk_put in the case of failure,
but this is not done for subsequent error handling code. The calls to
clk_get are moved to the end of the function, and appropriate gotos are
added.
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>
Signed-off-by: Kukjin Kim <kgene.kim@samsung.com>
Signed-off-by: Dave Jones <davej@redhat.com>
| -rw-r--r-- | drivers/cpufreq/s5pv210-cpufreq.c | 25 |
1 files changed, 17 insertions, 8 deletions
diff --git a/drivers/cpufreq/s5pv210-cpufreq.c b/drivers/cpufreq/s5pv210-cpufreq.c index ea35d3f74e3..a7cb3385bf5 100644 --- a/drivers/cpufreq/s5pv210-cpufreq.c +++ b/drivers/cpufreq/s5pv210-cpufreq.c @@ -415,6 +415,7 @@ static int check_mem_type(void __iomem *dmc_reg) static int __init s5pv210_cpu_init(struct cpufreq_policy *policy) { unsigned long mem_type; + int ret; cpu_clk = clk_get(NULL, "armclk"); if (IS_ERR(cpu_clk)) @@ -422,19 +423,20 @@ static int __init s5pv210_cpu_init(struct cpufreq_policy *policy) dmc0_clk = clk_get(NULL, "sclk_dmc0"); if (IS_ERR(dmc0_clk)) { - clk_put(cpu_clk); - return PTR_ERR(dmc0_clk); + ret = PTR_ERR(dmc0_clk); + goto out_dmc0; } dmc1_clk = clk_get(NULL, "hclk_msys"); if (IS_ERR(dmc1_clk)) { - clk_put(dmc0_clk); - clk_put(cpu_clk); - return PTR_ERR(dmc1_clk); + ret = PTR_ERR(dmc1_clk); + goto out_dmc1; } - if (policy->cpu != 0) - return -EINVAL; + if (policy->cpu != 0) { + ret = -EINVAL; + goto out_dmc1; + } /* * check_mem_type : This driver only support LPDDR & LPDDR2. @@ -444,7 +446,8 @@ static int __init s5pv210_cpu_init(struct cpufreq_policy *policy) if ((mem_type != LPDDR) && (mem_type != LPDDR2)) { printk(KERN_ERR "CPUFreq doesn't support this memory type\n"); - return -EINVAL; + ret = -EINVAL; + goto out_dmc1; } /* Find current refresh counter and frequency each DMC */ @@ -461,6 +464,12 @@ static int __init s5pv210_cpu_init(struct cpufreq_policy *policy) policy->cpuinfo.transition_latency = 40000; return cpufreq_frequency_table_cpuinfo(policy, s5pv210_freq_table); + +out_dmc1: + clk_put(dmc0_clk); +out_dmc0: + clk_put(cpu_clk); + return ret; } static struct cpufreq_driver s5pv210_driver = { |