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| author | Hiroshi DOYU <Hiroshi.DOYU@nokia.com> | 2007-08-30 12:46:39 +0300 |
|---|---|---|
| committer | Tony Lindgren <tony@atomide.com> | 2008-03-05 10:23:19 +0200 |
| commit | b8488fbe6d2f32ff4ad2f8f348a50e42389fc727 (patch) | |
| tree | f3b58df85c57e60bf999a25336c99faf2bc7ae21 /arch/arm | |
| parent | 538528de0cb256f65716ab2e9613d9e920f97fe2 (diff) | |
| download | linux-b8488fbe6d2f32ff4ad2f8f348a50e42389fc727.tar.gz linux-b8488fbe6d2f32ff4ad2f8f348a50e42389fc727.tar.bz2 linux-b8488fbe6d2f32ff4ad2f8f348a50e42389fc727.zip | |
ARM: OMAP: Fix sleep under spinlock for cpufreq
[ 10.523437] BUG: sleeping function called from invalid context at kernel/mut6
[ 10.523437] in_atomic():0, irqs_disabled():128
[ 10.523437] [<c002c168>] (dump_stack+0x0/0x14) from [<c005374c>] (__might_sl)
[ 10.523437] [<c0053698>] (__might_sleep+0x0/0xd4) from [<c024fdf4>] (mutex_l)
[ 10.523437] r5 = C02F0DE8 r4 = C02F0DF0
[ 10.523437] [<c024fdd4>] (mutex_lock+0x0/0x44) from [<c0041df4>] (clk_get+0x)
[ 10.523437] r4 = 00000000
[ 10.523437] [<c0041da4>] (clk_get+0x0/0x128) from [<c0046520>] (omap_getspee)
[ 10.523437] r8 = 00000002 r7 = 00000000 r6 = C031DAF8 r5 = C0473980
[ 10.523437] r4 = 00000000
[ 10.523437] [<c00464fc>] (omap_getspeed+0x0/0x5c) from [<c01b8518>] (cpufreq)
[ 10.523437] r5 = C0473980 r4 = 00000002
Signed-off-by: Hiroshi DOYU <Hiroshi.DOYU@nokia.com>
Signed-off-by: Tony Lindgren <tony@atomide.com>
Diffstat (limited to 'arch/arm')
| -rw-r--r-- | arch/arm/plat-omap/cpu-omap.c | 32 |
1 files changed, 10 insertions, 22 deletions
diff --git a/arch/arm/plat-omap/cpu-omap.c b/arch/arm/plat-omap/cpu-omap.c index c0d63b0c61c9..d719c15daa55 100644 --- a/arch/arm/plat-omap/cpu-omap.c +++ b/arch/arm/plat-omap/cpu-omap.c @@ -33,43 +33,33 @@ #define MPU_CLK "virt_prcm_set" #endif +static struct clk *mpu_clk; + /* TODO: Add support for SDRAM timing changes */ int omap_verify_speed(struct cpufreq_policy *policy) { - struct clk * mpu_clk; - if (policy->cpu) return -EINVAL; cpufreq_verify_within_limits(policy, policy->cpuinfo.min_freq, policy->cpuinfo.max_freq); - mpu_clk = clk_get(NULL, MPU_CLK); - if (IS_ERR(mpu_clk)) - return PTR_ERR(mpu_clk); + policy->min = clk_round_rate(mpu_clk, policy->min * 1000) / 1000; policy->max = clk_round_rate(mpu_clk, policy->max * 1000) / 1000; cpufreq_verify_within_limits(policy, policy->cpuinfo.min_freq, policy->cpuinfo.max_freq); - clk_put(mpu_clk); - return 0; } unsigned int omap_getspeed(unsigned int cpu) { - struct clk * mpu_clk; unsigned long rate; if (cpu) return 0; - mpu_clk = clk_get(NULL, MPU_CLK); - if (IS_ERR(mpu_clk)) - return 0; rate = clk_get_rate(mpu_clk) / 1000; - clk_put(mpu_clk); - return rate; } @@ -77,14 +67,9 @@ static int omap_target(struct cpufreq_policy *policy, unsigned int target_freq, unsigned int relation) { - struct clk * mpu_clk; struct cpufreq_freqs freqs; int ret = 0; - mpu_clk = clk_get(NULL, MPU_CLK); - if (IS_ERR(mpu_clk)) - return PTR_ERR(mpu_clk); - freqs.old = omap_getspeed(0); freqs.new = clk_round_rate(mpu_clk, target_freq * 1000) / 1000; freqs.cpu = 0; @@ -92,15 +77,12 @@ static int omap_target(struct cpufreq_policy *policy, cpufreq_notify_transition(&freqs, CPUFREQ_PRECHANGE); ret = clk_set_rate(mpu_clk, target_freq * 1000); cpufreq_notify_transition(&freqs, CPUFREQ_POSTCHANGE); - clk_put(mpu_clk); return ret; } static int __init omap_cpu_init(struct cpufreq_policy *policy) { - struct clk * mpu_clk; - mpu_clk = clk_get(NULL, MPU_CLK); if (IS_ERR(mpu_clk)) return PTR_ERR(mpu_clk); @@ -111,17 +93,23 @@ static int __init omap_cpu_init(struct cpufreq_policy *policy) policy->cpuinfo.min_freq = clk_round_rate(mpu_clk, 0) / 1000; policy->cpuinfo.max_freq = clk_round_rate(mpu_clk, VERY_HI_RATE) / 1000; policy->cpuinfo.transition_latency = CPUFREQ_ETERNAL; - clk_put(mpu_clk); return 0; } +static int omap_cpu_exit(struct cpufreq_policy *policy) +{ + clk_put(mpu_clk); + return 0; +} + static struct cpufreq_driver omap_driver = { .flags = CPUFREQ_STICKY, .verify = omap_verify_speed, .target = omap_target, .get = omap_getspeed, .init = omap_cpu_init, + .exit = omap_cpu_exit, .name = "omap", }; |