diff options
Diffstat (limited to 'drivers/parisc/pdc_stable.c')
| -rw-r--r-- | drivers/parisc/pdc_stable.c | 234 |
1 files changed, 116 insertions, 118 deletions
diff --git a/drivers/parisc/pdc_stable.c b/drivers/parisc/pdc_stable.c index ea1b7a63598..0f54ab6260d 100644 --- a/drivers/parisc/pdc_stable.c +++ b/drivers/parisc/pdc_stable.c @@ -120,15 +120,15 @@ struct pdcspath_entry pdcspath_entry_##_name = { \ }; #define PDCS_ATTR(_name, _mode, _show, _store) \ -struct subsys_attribute pdcs_attr_##_name = { \ - .attr = {.name = __stringify(_name), .mode = _mode, .owner = THIS_MODULE}, \ +struct kobj_attribute pdcs_attr_##_name = { \ + .attr = {.name = __stringify(_name), .mode = _mode}, \ .show = _show, \ .store = _store, \ }; #define PATHS_ATTR(_name, _mode, _show, _store) \ struct pdcspath_attribute paths_attr_##_name = { \ - .attr = {.name = __stringify(_name), .mode = _mode, .owner = THIS_MODULE}, \ + .attr = {.name = __stringify(_name), .mode = _mode}, \ .show = _show, \ .store = _store, \ }; @@ -141,7 +141,7 @@ struct pdcspath_attribute paths_attr_##_name = { \ * @entry: A pointer to an allocated pdcspath_entry. * * The general idea is that you don't read from the Stable Storage every time - * you access the files provided by the facilites. We store a copy of the + * you access the files provided by the facilities. We store a copy of the * content of the stable storage WRT various paths in these structs. We read * these structs when reading the files, and we will write to these structs when * writing to the files, and only then write them back to the Stable Storage. @@ -212,12 +212,10 @@ pdcspath_store(struct pdcspath_entry *entry) entry, devpath, entry->addr); /* addr, devpath and count must be word aligned */ - if (pdc_stable_write(entry->addr, devpath, sizeof(*devpath)) != PDC_OK) { - printk(KERN_ERR "%s: an error occured when writing to PDC.\n" + if (pdc_stable_write(entry->addr, devpath, sizeof(*devpath)) != PDC_OK) + WARN(1, KERN_ERR "%s: an error occurred when writing to PDC.\n" "It is likely that the Stable Storage data has been corrupted.\n" "Please check it carefully upon next reboot.\n", __func__); - WARN_ON(1); - } /* kobject is already registered */ entry->ready = 2; @@ -282,6 +280,7 @@ pdcspath_hwpath_write(struct pdcspath_entry *entry, const char *buf, size_t coun unsigned short i; char in[count+1], *temp; struct device *dev; + int ret; if (!entry || !buf || !count) return -EINVAL; @@ -333,7 +332,9 @@ pdcspath_hwpath_write(struct pdcspath_entry *entry, const char *buf, size_t coun /* Update the symlink to the real device */ sysfs_remove_link(&entry->kobj, "device"); - sysfs_create_link(&entry->kobj, &entry->dev->kobj, "device"); + ret = sysfs_create_link(&entry->kobj, &entry->dev->kobj, "device"); + WARN_ON(ret); + write_unlock(&entry->rw_lock); printk(KERN_INFO PDCS_PREFIX ": changed \"%s\" path to \"%s\"\n", @@ -367,7 +368,7 @@ pdcspath_layer_read(struct pdcspath_entry *entry, char *buf) if (!i) /* entry is not ready */ return -ENODATA; - for (i = 0; devpath->layers[i] && (likely(i < 6)); i++) + for (i = 0; i < 6 && devpath->layers[i]; i++) out += sprintf(out, "%u ", devpath->layers[i]); out += sprintf(out, "\n"); @@ -478,7 +479,7 @@ pdcspath_attr_store(struct kobject *kobj, struct attribute *attr, return ret; } -static struct sysfs_ops pdcspath_attr_ops = { +static const struct sysfs_ops pdcspath_attr_ops = { .show = pdcspath_attr_show, .store = pdcspath_attr_store, }; @@ -520,17 +521,17 @@ static struct pdcspath_entry *pdcspath_entries[] = { /** * pdcs_size_read - Stable Storage size output. - * @entry: An allocated and populated subsytem struct. We don't use it tho. * @buf: The output buffer to write to. */ -static ssize_t -pdcs_size_read(struct subsystem *entry, char *buf) +static ssize_t pdcs_size_read(struct kobject *kobj, + struct kobj_attribute *attr, + char *buf) { char *out = buf; - - if (!entry || !buf) + + if (!buf) return -EINVAL; - + /* show the size of the stable storage */ out += sprintf(out, "%ld\n", pdcs_size); @@ -539,17 +540,17 @@ pdcs_size_read(struct subsystem *entry, char *buf) /** * pdcs_auto_read - Stable Storage autoboot/search flag output. - * @entry: An allocated and populated subsytem struct. We don't use it tho. * @buf: The output buffer to write to. * @knob: The PF_AUTOBOOT or PF_AUTOSEARCH flag */ -static ssize_t -pdcs_auto_read(struct subsystem *entry, char *buf, int knob) +static ssize_t pdcs_auto_read(struct kobject *kobj, + struct kobj_attribute *attr, + char *buf, int knob) { char *out = buf; struct pdcspath_entry *pathentry; - if (!entry || !buf) + if (!buf) return -EINVAL; /* Current flags are stored in primary boot path entry */ @@ -565,40 +566,37 @@ pdcs_auto_read(struct subsystem *entry, char *buf, int knob) /** * pdcs_autoboot_read - Stable Storage autoboot flag output. - * @entry: An allocated and populated subsytem struct. We don't use it tho. * @buf: The output buffer to write to. */ -static inline ssize_t -pdcs_autoboot_read(struct subsystem *entry, char *buf) +static ssize_t pdcs_autoboot_read(struct kobject *kobj, + struct kobj_attribute *attr, char *buf) { - return pdcs_auto_read(entry, buf, PF_AUTOBOOT); + return pdcs_auto_read(kobj, attr, buf, PF_AUTOBOOT); } /** * pdcs_autosearch_read - Stable Storage autoboot flag output. - * @entry: An allocated and populated subsytem struct. We don't use it tho. * @buf: The output buffer to write to. */ -static inline ssize_t -pdcs_autosearch_read(struct subsystem *entry, char *buf) +static ssize_t pdcs_autosearch_read(struct kobject *kobj, + struct kobj_attribute *attr, char *buf) { - return pdcs_auto_read(entry, buf, PF_AUTOSEARCH); + return pdcs_auto_read(kobj, attr, buf, PF_AUTOSEARCH); } /** * pdcs_timer_read - Stable Storage timer count output (in seconds). - * @entry: An allocated and populated subsytem struct. We don't use it tho. * @buf: The output buffer to write to. * * The value of the timer field correponds to a number of seconds in powers of 2. */ -static ssize_t -pdcs_timer_read(struct subsystem *entry, char *buf) +static ssize_t pdcs_timer_read(struct kobject *kobj, + struct kobj_attribute *attr, char *buf) { char *out = buf; struct pdcspath_entry *pathentry; - if (!entry || !buf) + if (!buf) return -EINVAL; /* Current flags are stored in primary boot path entry */ @@ -615,15 +613,14 @@ pdcs_timer_read(struct subsystem *entry, char *buf) /** * pdcs_osid_read - Stable Storage OS ID register output. - * @entry: An allocated and populated subsytem struct. We don't use it tho. * @buf: The output buffer to write to. */ -static ssize_t -pdcs_osid_read(struct subsystem *entry, char *buf) +static ssize_t pdcs_osid_read(struct kobject *kobj, + struct kobj_attribute *attr, char *buf) { char *out = buf; - if (!entry || !buf) + if (!buf) return -EINVAL; out += sprintf(out, "%s dependent data (0x%.4x)\n", @@ -634,18 +631,17 @@ pdcs_osid_read(struct subsystem *entry, char *buf) /** * pdcs_osdep1_read - Stable Storage OS-Dependent data area 1 output. - * @entry: An allocated and populated subsytem struct. We don't use it tho. * @buf: The output buffer to write to. * * This can hold 16 bytes of OS-Dependent data. */ -static ssize_t -pdcs_osdep1_read(struct subsystem *entry, char *buf) +static ssize_t pdcs_osdep1_read(struct kobject *kobj, + struct kobj_attribute *attr, char *buf) { char *out = buf; u32 result[4]; - if (!entry || !buf) + if (!buf) return -EINVAL; if (pdc_stable_read(PDCS_ADDR_OSD1, &result, sizeof(result)) != PDC_OK) @@ -661,18 +657,17 @@ pdcs_osdep1_read(struct subsystem *entry, char *buf) /** * pdcs_diagnostic_read - Stable Storage Diagnostic register output. - * @entry: An allocated and populated subsytem struct. We don't use it tho. * @buf: The output buffer to write to. * * I have NFC how to interpret the content of that register ;-). */ -static ssize_t -pdcs_diagnostic_read(struct subsystem *entry, char *buf) +static ssize_t pdcs_diagnostic_read(struct kobject *kobj, + struct kobj_attribute *attr, char *buf) { char *out = buf; u32 result; - if (!entry || !buf) + if (!buf) return -EINVAL; /* get diagnostic */ @@ -686,18 +681,17 @@ pdcs_diagnostic_read(struct subsystem *entry, char *buf) /** * pdcs_fastsize_read - Stable Storage FastSize register output. - * @entry: An allocated and populated subsytem struct. We don't use it tho. * @buf: The output buffer to write to. * * This register holds the amount of system RAM to be tested during boot sequence. */ -static ssize_t -pdcs_fastsize_read(struct subsystem *entry, char *buf) +static ssize_t pdcs_fastsize_read(struct kobject *kobj, + struct kobj_attribute *attr, char *buf) { char *out = buf; u32 result; - if (!entry || !buf) + if (!buf) return -EINVAL; /* get fast-size */ @@ -715,13 +709,12 @@ pdcs_fastsize_read(struct subsystem *entry, char *buf) /** * pdcs_osdep2_read - Stable Storage OS-Dependent data area 2 output. - * @entry: An allocated and populated subsytem struct. We don't use it tho. * @buf: The output buffer to write to. * * This can hold pdcs_size - 224 bytes of OS-Dependent data, when available. */ -static ssize_t -pdcs_osdep2_read(struct subsystem *entry, char *buf) +static ssize_t pdcs_osdep2_read(struct kobject *kobj, + struct kobj_attribute *attr, char *buf) { char *out = buf; unsigned long size; @@ -733,7 +726,7 @@ pdcs_osdep2_read(struct subsystem *entry, char *buf) size = pdcs_size - 224; - if (!entry || !buf) + if (!buf) return -EINVAL; for (i=0; i<size; i+=4) { @@ -748,7 +741,6 @@ pdcs_osdep2_read(struct subsystem *entry, char *buf) /** * pdcs_auto_write - This function handles autoboot/search flag modifying. - * @entry: An allocated and populated subsytem struct. We don't use it tho. * @buf: The input buffer to read from. * @count: The number of bytes to be read. * @knob: The PF_AUTOBOOT or PF_AUTOSEARCH flag @@ -757,8 +749,9 @@ pdcs_osdep2_read(struct subsystem *entry, char *buf) * We expect a precise syntax: * \"n\" (n == 0 or 1) to toggle AutoBoot Off or On */ -static ssize_t -pdcs_auto_write(struct subsystem *entry, const char *buf, size_t count, int knob) +static ssize_t pdcs_auto_write(struct kobject *kobj, + struct kobj_attribute *attr, const char *buf, + size_t count, int knob) { struct pdcspath_entry *pathentry; unsigned char flags; @@ -768,7 +761,7 @@ pdcs_auto_write(struct subsystem *entry, const char *buf, size_t count, int knob if (!capable(CAP_SYS_ADMIN)) return -EACCES; - if (!entry || !buf || !count) + if (!buf || !count) return -EINVAL; /* We'll use a local copy of buf */ @@ -784,12 +777,9 @@ pdcs_auto_write(struct subsystem *entry, const char *buf, size_t count, int knob read_unlock(&pathentry->rw_lock); DPRINTK("%s: flags before: 0x%X\n", __func__, flags); - - temp = in; - - while (*temp && isspace(*temp)) - temp++; - + + temp = skip_spaces(in); + c = *temp++ - '0'; if ((c != 0) && (c != 1)) goto parse_error; @@ -823,7 +813,6 @@ parse_error: /** * pdcs_autoboot_write - This function handles autoboot flag modifying. - * @entry: An allocated and populated subsytem struct. We don't use it tho. * @buf: The input buffer to read from. * @count: The number of bytes to be read. * @@ -831,15 +820,15 @@ parse_error: * We expect a precise syntax: * \"n\" (n == 0 or 1) to toggle AutoSearch Off or On */ -static inline ssize_t -pdcs_autoboot_write(struct subsystem *entry, const char *buf, size_t count) +static ssize_t pdcs_autoboot_write(struct kobject *kobj, + struct kobj_attribute *attr, + const char *buf, size_t count) { - return pdcs_auto_write(entry, buf, count, PF_AUTOBOOT); + return pdcs_auto_write(kobj, attr, buf, count, PF_AUTOBOOT); } /** * pdcs_autosearch_write - This function handles autosearch flag modifying. - * @entry: An allocated and populated subsytem struct. We don't use it tho. * @buf: The input buffer to read from. * @count: The number of bytes to be read. * @@ -847,15 +836,15 @@ pdcs_autoboot_write(struct subsystem *entry, const char *buf, size_t count) * We expect a precise syntax: * \"n\" (n == 0 or 1) to toggle AutoSearch Off or On */ -static inline ssize_t -pdcs_autosearch_write(struct subsystem *entry, const char *buf, size_t count) +static ssize_t pdcs_autosearch_write(struct kobject *kobj, + struct kobj_attribute *attr, + const char *buf, size_t count) { - return pdcs_auto_write(entry, buf, count, PF_AUTOSEARCH); + return pdcs_auto_write(kobj, attr, buf, count, PF_AUTOSEARCH); } /** * pdcs_osdep1_write - Stable Storage OS-Dependent data area 1 input. - * @entry: An allocated and populated subsytem struct. We don't use it tho. * @buf: The input buffer to read from. * @count: The number of bytes to be read. * @@ -863,15 +852,16 @@ pdcs_autosearch_write(struct subsystem *entry, const char *buf, size_t count) * write approach. It's up to userspace to deal with it when constructing * its input buffer. */ -static ssize_t -pdcs_osdep1_write(struct subsystem *entry, const char *buf, size_t count) +static ssize_t pdcs_osdep1_write(struct kobject *kobj, + struct kobj_attribute *attr, + const char *buf, size_t count) { u8 in[16]; if (!capable(CAP_SYS_ADMIN)) return -EACCES; - if (!entry || !buf || !count) + if (!buf || !count) return -EINVAL; if (unlikely(pdcs_osid != OS_ID_LINUX)) @@ -892,7 +882,6 @@ pdcs_osdep1_write(struct subsystem *entry, const char *buf, size_t count) /** * pdcs_osdep2_write - Stable Storage OS-Dependent data area 2 input. - * @entry: An allocated and populated subsytem struct. We don't use it tho. * @buf: The input buffer to read from. * @count: The number of bytes to be read. * @@ -900,8 +889,9 @@ pdcs_osdep1_write(struct subsystem *entry, const char *buf, size_t count) * byte-by-byte write approach. It's up to userspace to deal with it when * constructing its input buffer. */ -static ssize_t -pdcs_osdep2_write(struct subsystem *entry, const char *buf, size_t count) +static ssize_t pdcs_osdep2_write(struct kobject *kobj, + struct kobj_attribute *attr, + const char *buf, size_t count) { unsigned long size; unsigned short i; @@ -910,7 +900,7 @@ pdcs_osdep2_write(struct subsystem *entry, const char *buf, size_t count) if (!capable(CAP_SYS_ADMIN)) return -EACCES; - if (!entry || !buf || !count) + if (!buf || !count) return -EINVAL; if (unlikely(pdcs_size <= 224)) @@ -948,21 +938,25 @@ static PDCS_ATTR(diagnostic, 0400, pdcs_diagnostic_read, NULL); static PDCS_ATTR(fastsize, 0400, pdcs_fastsize_read, NULL); static PDCS_ATTR(osdep2, 0600, pdcs_osdep2_read, pdcs_osdep2_write); -static struct subsys_attribute *pdcs_subsys_attrs[] = { - &pdcs_attr_size, - &pdcs_attr_autoboot, - &pdcs_attr_autosearch, - &pdcs_attr_timer, - &pdcs_attr_osid, - &pdcs_attr_osdep1, - &pdcs_attr_diagnostic, - &pdcs_attr_fastsize, - &pdcs_attr_osdep2, +static struct attribute *pdcs_subsys_attrs[] = { + &pdcs_attr_size.attr, + &pdcs_attr_autoboot.attr, + &pdcs_attr_autosearch.attr, + &pdcs_attr_timer.attr, + &pdcs_attr_osid.attr, + &pdcs_attr_osdep1.attr, + &pdcs_attr_diagnostic.attr, + &pdcs_attr_fastsize.attr, + &pdcs_attr_osdep2.attr, NULL, }; -static decl_subsys(paths, &ktype_pdcspath, NULL); -static decl_subsys(stable, NULL, NULL); +static struct attribute_group pdcs_attr_group = { + .attrs = pdcs_subsys_attrs, +}; + +static struct kobject *stable_kobj; +static struct kset *paths_kset; /** * pdcs_register_pathentries - Prepares path entries kobjects for sysfs usage. @@ -992,21 +986,24 @@ pdcs_register_pathentries(void) if (err < 0) continue; - if ((err = kobject_set_name(&entry->kobj, "%s", entry->name))) + entry->kobj.kset = paths_kset; + err = kobject_init_and_add(&entry->kobj, &ktype_pdcspath, NULL, + "%s", entry->name); + if (err) return err; - kobj_set_kset_s(entry, paths_subsys); - if ((err = kobject_register(&entry->kobj))) - return err; - + /* kobject is now registered */ write_lock(&entry->rw_lock); entry->ready = 2; /* Add a nice symlink to the real device */ - if (entry->dev) - sysfs_create_link(&entry->kobj, &entry->dev->kobj, "device"); + if (entry->dev) { + err = sysfs_create_link(&entry->kobj, &entry->dev->kobj, "device"); + WARN_ON(err); + } write_unlock(&entry->rw_lock); + kobject_uevent(&entry->kobj, KOBJ_ADD); } return 0; @@ -1024,7 +1021,7 @@ pdcs_unregister_pathentries(void) for (i = 0; (entry = pdcspath_entries[i]); i++) { read_lock(&entry->rw_lock); if (entry->ready >= 2) - kobject_unregister(&entry->kobj); + kobject_put(&entry->kobj); read_unlock(&entry->rw_lock); } } @@ -1036,8 +1033,7 @@ pdcs_unregister_pathentries(void) static int __init pdc_stable_init(void) { - struct subsys_attribute *attr; - int i, rc = 0, error = 0; + int rc = 0, error = 0; u32 result; /* find the size of the stable storage */ @@ -1057,21 +1053,24 @@ pdc_stable_init(void) /* the actual result is 16 bits away */ pdcs_osid = (u16)(result >> 16); - /* For now we'll register the stable subsys within this driver */ - if ((rc = firmware_register(&stable_subsys))) + /* For now we'll register the directory at /sys/firmware/stable */ + stable_kobj = kobject_create_and_add("stable", firmware_kobj); + if (!stable_kobj) { + rc = -ENOMEM; goto fail_firmreg; + } /* Don't forget the root entries */ - for (i = 0; (attr = pdcs_subsys_attrs[i]) && !error; i++) - if (attr->show) - error = subsys_create_file(&stable_subsys, attr); - - /* register the paths subsys as a subsystem of stable subsys */ - kset_set_kset_s(&paths_subsys, stable_subsys); - if ((rc = subsystem_register(&paths_subsys))) - goto fail_subsysreg; + error = sysfs_create_group(stable_kobj, &pdcs_attr_group); - /* now we create all "files" for the paths subsys */ + /* register the paths kset as a child of the stable kset */ + paths_kset = kset_create_and_add("paths", NULL, stable_kobj); + if (!paths_kset) { + rc = -ENOMEM; + goto fail_ksetreg; + } + + /* now we create all "files" for the paths kset */ if ((rc = pdcs_register_pathentries())) goto fail_pdcsreg; @@ -1079,10 +1078,10 @@ pdc_stable_init(void) fail_pdcsreg: pdcs_unregister_pathentries(); - subsystem_unregister(&paths_subsys); + kset_unregister(paths_kset); -fail_subsysreg: - firmware_unregister(&stable_subsys); +fail_ksetreg: + kobject_put(stable_kobj); fail_firmreg: printk(KERN_INFO PDCS_PREFIX " bailing out\n"); @@ -1093,9 +1092,8 @@ static void __exit pdc_stable_exit(void) { pdcs_unregister_pathentries(); - subsystem_unregister(&paths_subsys); - - firmware_unregister(&stable_subsys); + kset_unregister(paths_kset); + kobject_put(stable_kobj); } |