From 1f8b2c9d38c132e79e18cc726cf7a40ebdcb56d9 Mon Sep 17 00:00:00 2001 From: Dave Jones Date: Wed, 29 Mar 2006 01:40:04 -0500 Subject: [CPUFREQ] extra debugging in cpufreq_add_dev() Snipped from an otherwise rejected patch by Jan Beulich Signed-off-by: Dave Jones --- drivers/cpufreq/cpufreq.c | 2 +- 1 file changed, 1 insertion(+), 1 deletion(-) diff --git a/drivers/cpufreq/cpufreq.c b/drivers/cpufreq/cpufreq.c index 9b6ae7dc8b8..f2179ab65c4 100644 --- a/drivers/cpufreq/cpufreq.c +++ b/drivers/cpufreq/cpufreq.c @@ -685,7 +685,7 @@ static int cpufreq_add_dev (struct sys_device * sys_dev) if (!cpu_online(j)) continue; - dprintk("CPU already managed, adding link\n"); + dprintk("CPU %u already managed, adding link\n", j); cpufreq_cpu_get(cpu); cpu_sys_dev = get_cpu_sysdev(j); sysfs_create_link(&cpu_sys_dev->kobj, &policy->kobj, -- cgit v1.2.3 From 87c32271380e630955de365656f67b0a54b75b19 Mon Sep 17 00:00:00 2001 From: Dave Jones Date: Wed, 29 Mar 2006 01:48:37 -0500 Subject: [CPUFREQ] trailing whitespace removal de-jour. Signed-off-by: Dave Jones --- drivers/cpufreq/cpufreq.c | 5 ++--- 1 file changed, 2 insertions(+), 3 deletions(-) diff --git a/drivers/cpufreq/cpufreq.c b/drivers/cpufreq/cpufreq.c index f2179ab65c4..3d0430741b5 100644 --- a/drivers/cpufreq/cpufreq.c +++ b/drivers/cpufreq/cpufreq.c @@ -695,9 +695,8 @@ static int cpufreq_add_dev (struct sys_device * sys_dev) policy->governor = NULL; /* to assure that the starting sequence is * run in cpufreq_set_policy */ mutex_unlock(&policy->lock); - + /* set default policy */ - ret = cpufreq_set_policy(&new_policy); if (ret) { dprintk("setting policy failed\n"); @@ -707,7 +706,7 @@ static int cpufreq_add_dev (struct sys_device * sys_dev) module_put(cpufreq_driver->owner); dprintk("initialization complete\n"); cpufreq_debug_enable_ratelimit(); - + return 0; -- cgit v1.2.3 From b82fbe6c4232365272bde6f2c3f8fd9dd4dcd73a Mon Sep 17 00:00:00 2001 From: Dave Jones Date: Sat, 1 Apr 2006 22:07:07 -0500 Subject: [CPUFREQ] Remove pointless check in conservative governor. < 0 checks on unsigned variables are pointless. Signed-off-by: Dave Jones --- drivers/cpufreq/cpufreq_conservative.c | 6 ++---- 1 file changed, 2 insertions(+), 4 deletions(-) diff --git a/drivers/cpufreq/cpufreq_conservative.c b/drivers/cpufreq/cpufreq_conservative.c index 037f6bf4543..e07a35487bd 100644 --- a/drivers/cpufreq/cpufreq_conservative.c +++ b/drivers/cpufreq/cpufreq_conservative.c @@ -176,8 +176,7 @@ static ssize_t store_up_threshold(struct cpufreq_policy *unused, ret = sscanf (buf, "%u", &input); mutex_lock(&dbs_mutex); - if (ret != 1 || input > 100 || input < 0 || - input <= dbs_tuners_ins.down_threshold) { + if (ret != 1 || input > 100 || input <= dbs_tuners_ins.down_threshold) { mutex_unlock(&dbs_mutex); return -EINVAL; } @@ -196,8 +195,7 @@ static ssize_t store_down_threshold(struct cpufreq_policy *unused, ret = sscanf (buf, "%u", &input); mutex_lock(&dbs_mutex); - if (ret != 1 || input > 100 || input < 0 || - input >= dbs_tuners_ins.up_threshold) { + if (ret != 1 || input > 100 || input >= dbs_tuners_ins.up_threshold) { mutex_unlock(&dbs_mutex); return -EINVAL; } -- cgit v1.2.3 From 4c41251e31982002bca0ce7e903c0cc66218c1ec Mon Sep 17 00:00:00 2001 From: Erik Mouw Date: Mon, 3 Apr 2006 14:21:00 +0200 Subject: [CPUFREQ] Update LART site URL Update LART site URL. The LART website moved to http://www.lartmaker.nl/. This patch updates the URL in CpuFreq specific files. Signed-off-by: Erik Mouw Signed-off-by: Dave Jones --- Documentation/cpu-freq/index.txt | 2 +- drivers/cpufreq/Kconfig | 2 +- 2 files changed, 2 insertions(+), 2 deletions(-) diff --git a/Documentation/cpu-freq/index.txt b/Documentation/cpu-freq/index.txt index 5009805f937..ffdb5323df3 100644 --- a/Documentation/cpu-freq/index.txt +++ b/Documentation/cpu-freq/index.txt @@ -53,4 +53,4 @@ the CPUFreq Mailing list: * http://lists.linux.org.uk/mailman/listinfo/cpufreq Clock and voltage scaling for the SA-1100: -* http://www.lart.tudelft.nl/projects/scaling +* http://www.lartmaker.nl/projects/scaling diff --git a/drivers/cpufreq/Kconfig b/drivers/cpufreq/Kconfig index 60c9be99c6d..2cc71b66231 100644 --- a/drivers/cpufreq/Kconfig +++ b/drivers/cpufreq/Kconfig @@ -99,7 +99,7 @@ config CPU_FREQ_GOV_USERSPACE Enable this cpufreq governor when you either want to set the CPU frequency manually or when an userspace program shall be able to set the CPU dynamically, like on LART - + . For details, take a look at . -- cgit v1.2.3 From b40fc4923ee3352c44ac2c0bd5f4d6018d6c4ad7 Mon Sep 17 00:00:00 2001 From: Andi Kleen Date: Fri, 7 Apr 2006 19:49:48 +0200 Subject: [CPUFREQ] x86_64: Revert earlier powernow-k8 change (Better fix to be applied in next patch) Signed-off-by: Andi Kleen Signed-off-by: Dave Jones --- arch/i386/kernel/cpu/cpufreq/powernow-k8.c | 7 +++---- 1 file changed, 3 insertions(+), 4 deletions(-) diff --git a/arch/i386/kernel/cpu/cpufreq/powernow-k8.c b/arch/i386/kernel/cpu/cpufreq/powernow-k8.c index 712a26bd445..6ba497c47df 100644 --- a/arch/i386/kernel/cpu/cpufreq/powernow-k8.c +++ b/arch/i386/kernel/cpu/cpufreq/powernow-k8.c @@ -55,7 +55,7 @@ static DEFINE_MUTEX(fidvid_mutex); static struct powernow_k8_data *powernow_data[NR_CPUS]; #ifndef CONFIG_SMP -static cpumask_t cpu_core_map[1] = { CPU_MASK_ALL }; +static cpumask_t cpu_core_map[1]; #endif /* Return a frequency in MHz, given an input fid */ @@ -977,7 +977,7 @@ static int __cpuinit powernowk8_cpu_init(struct cpufreq_policy *pol) { struct powernow_k8_data *data; cpumask_t oldmask = CPU_MASK_ALL; - int rc, i; + int rc; if (!cpu_online(pol->cpu)) return -ENODEV; @@ -1063,8 +1063,7 @@ static int __cpuinit powernowk8_cpu_init(struct cpufreq_policy *pol) printk("cpu_init done, current fid 0x%x, vid 0x%x\n", data->currfid, data->currvid); - for_each_cpu_mask(i, cpu_core_map[pol->cpu]) - powernow_data[i] = data; + powernow_data[pol->cpu] = data; return 0; -- cgit v1.2.3 From 530515a06f90c0831732709efee4a99497bd2b7c Mon Sep 17 00:00:00 2001 From: "jacob.shin@amd.com" Date: Fri, 7 Apr 2006 19:49:51 +0200 Subject: [CPUFREQ] x86_64: Proper null pointer check in powernow_k8_get This prevents crashes on dual core system when enough ticks are lost. Replaces earlier patch by me. (Duplicate null data check in powernowk8_get() removed -- davej) arch/i386/kernel/cpu/cpufreq/powernow-k8.c | 11 ++++++++++- 1 file changed, 10 insertions(+), 1 deletion(-) Signed-off-by: Thomas Renninger Signed-off-by: Andi Kleen Signed-off-by: Dave Jones --- arch/i386/kernel/cpu/cpufreq/powernow-k8.c | 8 +++++++- 1 file changed, 7 insertions(+), 1 deletion(-) diff --git a/arch/i386/kernel/cpu/cpufreq/powernow-k8.c b/arch/i386/kernel/cpu/cpufreq/powernow-k8.c index 6ba497c47df..30bb6fd5b2b 100644 --- a/arch/i386/kernel/cpu/cpufreq/powernow-k8.c +++ b/arch/i386/kernel/cpu/cpufreq/powernow-k8.c @@ -46,7 +46,7 @@ #define PFX "powernow-k8: " #define BFX PFX "BIOS error: " -#define VERSION "version 1.60.1" +#define VERSION "version 1.60.2" #include "powernow-k8.h" /* serialize freq changes */ @@ -910,6 +910,9 @@ static int powernowk8_target(struct cpufreq_policy *pol, unsigned targfreq, unsi unsigned int newstate; int ret = -EIO; + if (!data) + return -EINVAL; + /* only run on specific CPU from here on */ oldmask = current->cpus_allowed; set_cpus_allowed(current, cpumask_of_cpu(pol->cpu)); @@ -969,6 +972,9 @@ static int powernowk8_verify(struct cpufreq_policy *pol) { struct powernow_k8_data *data = powernow_data[pol->cpu]; + if (!data) + return -EINVAL; + return cpufreq_frequency_table_verify(pol, data->powernow_table); } -- cgit v1.2.3 From 7970e08bf066900efcd7794a1a338c11eb8f5141 Mon Sep 17 00:00:00 2001 From: Thomas Renninger Date: Thu, 13 Apr 2006 15:14:04 +0200 Subject: [CPUFREQ] If max_freq got reduced (e.g. by _PPC) a write to sysfs scaling_governor let cpufreq core stuck at low max_freq for ever The previous patch had bugs (locking and refcount). This one could also be related to the latest DELL reports. But they only slip into this if a user prog (e.g. powersave daemon does when AC got (un) plugged due to a scheme change) echos something to /sys/../cpufreq/scaling_governor while the frequencies got limited by BIOS. This one works: Subject: Max freq stucks at low freq if reduced by _PPC and sysfs gov access The problem is reproducable by(if machine is limiting freqs via BIOS): - Unplugging AC -> max freq gets limited - echo ${governor} >/sys/.../cpufreq/scaling_governor (policy->user_data.max gets overridden with policy->max and will never come up again.) This patch exchanged the cpufreq_set_policy call to __cpufreq_set_policy and duplicated it's functionality but did not override user_data.max. The same happens with overridding min/max values. If freqs are limited and you override the min freq value, the max freq global value will also get stuck to the limited freq, even if BIOS allows all freqs again. Last scenario does only happen if BIOS does not reduce the frequency to the lowest value (should never happen, just for correctness...) drivers/cpufreq/cpufreq.c | 17 +++++++++++++++-- 1 files changed, 15 insertions(+), 2 deletions(-) Signed-off-by: Thomas Renninger Signed-off-by: "Pallipadi, Venkatesh" Signed-off-by: Dave Jones --- drivers/cpufreq/cpufreq.c | 17 +++++++++++++++-- 1 file changed, 15 insertions(+), 2 deletions(-) diff --git a/drivers/cpufreq/cpufreq.c b/drivers/cpufreq/cpufreq.c index 3d0430741b5..12e63642aa0 100644 --- a/drivers/cpufreq/cpufreq.c +++ b/drivers/cpufreq/cpufreq.c @@ -346,6 +346,8 @@ show_one(scaling_min_freq, min); show_one(scaling_max_freq, max); show_one(scaling_cur_freq, cur); +static int __cpufreq_set_policy(struct cpufreq_policy *data, struct cpufreq_policy *policy); + /** * cpufreq_per_cpu_attr_write() / store_##file_name() - sysfs write access */ @@ -364,7 +366,10 @@ static ssize_t store_##file_name \ if (ret != 1) \ return -EINVAL; \ \ - ret = cpufreq_set_policy(&new_policy); \ + mutex_lock(&policy->lock); \ + ret = __cpufreq_set_policy(policy, &new_policy); \ + policy->user_policy.object = policy->object; \ + mutex_unlock(&policy->lock); \ \ return ret ? ret : count; \ } @@ -420,7 +425,15 @@ static ssize_t store_scaling_governor (struct cpufreq_policy * policy, if (cpufreq_parse_governor(str_governor, &new_policy.policy, &new_policy.governor)) return -EINVAL; - ret = cpufreq_set_policy(&new_policy); + /* Do not use cpufreq_set_policy here or the user_policy.max + will be wrongly overridden */ + mutex_lock(&policy->lock); + ret = __cpufreq_set_policy(policy, &new_policy); + + policy->user_policy.policy = policy->policy; + policy->user_policy.governor = policy->governor; + mutex_unlock(&policy->lock); + return ret ? ret : count; } -- cgit v1.2.3 From 7b14dedd1fe72f33e128ed1b0cbf96d06acc7e9c Mon Sep 17 00:00:00 2001 From: Adrian Bunk Date: Tue, 18 Apr 2006 17:06:13 +0200 Subject: [CPUFREQ] drivers/cpufreq/cpufreq.c: static functions mustn't be exported This patch removes the EXPORT_SYMBOL_GPL of the static function cpufreq_parse_governor(). Signed-off-by: Adrian Bunk Signed-off-by: Dave Jones --- drivers/cpufreq/cpufreq.c | 1 - 1 file changed, 1 deletion(-) diff --git a/drivers/cpufreq/cpufreq.c b/drivers/cpufreq/cpufreq.c index 12e63642aa0..9759d05b197 100644 --- a/drivers/cpufreq/cpufreq.c +++ b/drivers/cpufreq/cpufreq.c @@ -319,7 +319,6 @@ out: } return -EINVAL; } -EXPORT_SYMBOL_GPL(cpufreq_parse_governor); /* drivers/base/cpu.c */ -- cgit v1.2.3 From 3aee086bd3ecce968283798ce4a73966c7ed44e3 Mon Sep 17 00:00:00 2001 From: Tobias Klauser Date: Mon, 10 Apr 2006 19:20:12 +0200 Subject: [CPUFREQ] Remove duplicate check in powernow-k8 Remove a duplicate NULL pointer check introduced by commit 4211a30349e8d2b724cfb4ce2584604f5e59c299 Signed-off-by: Tobias Klauser Signed-off-by: Dave Jones --- arch/i386/kernel/cpu/cpufreq/powernow-k8.c | 3 --- 1 file changed, 3 deletions(-) diff --git a/arch/i386/kernel/cpu/cpufreq/powernow-k8.c b/arch/i386/kernel/cpu/cpufreq/powernow-k8.c index 7c0e160a214..30bb6fd5b2b 100644 --- a/arch/i386/kernel/cpu/cpufreq/powernow-k8.c +++ b/arch/i386/kernel/cpu/cpufreq/powernow-k8.c @@ -1106,9 +1106,6 @@ static unsigned int powernowk8_get (unsigned int cpu) data = powernow_data[first_cpu(cpu_core_map[cpu])]; - if (!data) - return -EINVAL; - if (!data) return -EINVAL; -- cgit v1.2.3 From 9180053cacfec4aa233a6cabf1256960e75b0abd Mon Sep 17 00:00:00 2001 From: Adrian Bunk Date: Wed, 19 Apr 2006 00:07:28 +0200 Subject: [CPUFREQ] powernow-k8.c: fix a check-after-use This patch fixes a check-after-use introduced by commit 4211a30349e8d2b724cfb4ce2584604f5e59c299 and spotted by the Coverity checker. Signed-off-by: Adrian Bunk Signed-off-by: Dave Jones --- arch/i386/kernel/cpu/cpufreq/powernow-k8.c | 7 +++++-- 1 file changed, 5 insertions(+), 2 deletions(-) diff --git a/arch/i386/kernel/cpu/cpufreq/powernow-k8.c b/arch/i386/kernel/cpu/cpufreq/powernow-k8.c index 30bb6fd5b2b..71fffa17442 100644 --- a/arch/i386/kernel/cpu/cpufreq/powernow-k8.c +++ b/arch/i386/kernel/cpu/cpufreq/powernow-k8.c @@ -905,14 +905,17 @@ static int powernowk8_target(struct cpufreq_policy *pol, unsigned targfreq, unsi { cpumask_t oldmask = CPU_MASK_ALL; struct powernow_k8_data *data = powernow_data[pol->cpu]; - u32 checkfid = data->currfid; - u32 checkvid = data->currvid; + u32 checkfid; + u32 checkvid; unsigned int newstate; int ret = -EIO; if (!data) return -EINVAL; + checkfid = data->currfid; + checkvid = data->currvid; + /* only run on specific CPU from here on */ oldmask = current->cpus_allowed; set_cpus_allowed(current, cpumask_of_cpu(pol->cpu)); -- cgit v1.2.3