diff options
author | Stephen Rothwell <sfr@canb.auug.org.au> | 2024-05-02 14:50:11 +1000 |
---|---|---|
committer | Stephen Rothwell <sfr@canb.auug.org.au> | 2024-05-02 14:50:11 +1000 |
commit | 3d00d05e524720ff57a6a7215a235e03c6605fb3 (patch) | |
tree | 9cd967de45859603a38693b483da3cf6b1e3a4be | |
parent | d0793a6018934249c7ec951f06cb9dbda60d833f (diff) | |
parent | e5019b14230a0bc1f6641c9850ae39cfe76ad2aa (diff) | |
download | linux-next-3d00d05e524720ff57a6a7215a235e03c6605fb3.tar.gz |
Merge branch 'driver-core-next' of git://git.kernel.org/pub/scm/linux/kernel/git/gregkh/driver-core.git
Notice: this object is not reachable from any branch.
Notice: this object is not reachable from any branch.
-rw-r--r-- | arch/powerpc/platforms/powernv/opal.c | 10 | ||||
-rw-r--r-- | drivers/acpi/bgrt.c | 9 | ||||
-rw-r--r-- | drivers/base/base.h | 9 | ||||
-rw-r--r-- | drivers/base/bus.c | 9 | ||||
-rw-r--r-- | drivers/base/core.c | 8 | ||||
-rw-r--r-- | drivers/base/module.c | 42 | ||||
-rw-r--r-- | drivers/firmware/dmi_scan.c | 12 | ||||
-rw-r--r-- | drivers/firmware/efi/rci2-table.c | 10 | ||||
-rw-r--r-- | drivers/gpu/drm/i915/gvt/firmware.c | 26 | ||||
-rw-r--r-- | drivers/thermal/intel/int340x_thermal/int3400_thermal.c | 9 | ||||
-rw-r--r-- | fs/sysfs/file.c | 27 | ||||
-rw-r--r-- | include/linux/device.h | 11 | ||||
-rw-r--r-- | include/linux/sysfs.h | 15 | ||||
-rw-r--r-- | init/initramfs.c | 10 | ||||
-rw-r--r-- | kernel/module/sysfs.c | 13 |
15 files changed, 101 insertions, 119 deletions
diff --git a/arch/powerpc/platforms/powernv/opal.c b/arch/powerpc/platforms/powernv/opal.c index 45dd77e3ccf6f..5d0f35bb917eb 100644 --- a/arch/powerpc/platforms/powernv/opal.c +++ b/arch/powerpc/platforms/powernv/opal.c @@ -792,14 +792,6 @@ static int __init opal_sysfs_init(void) return 0; } -static ssize_t export_attr_read(struct file *fp, struct kobject *kobj, - struct bin_attribute *bin_attr, char *buf, - loff_t off, size_t count) -{ - return memory_read_from_buffer(buf, count, &off, bin_attr->private, - bin_attr->size); -} - static int opal_add_one_export(struct kobject *parent, const char *export_name, struct device_node *np, const char *prop_name) { @@ -826,7 +818,7 @@ static int opal_add_one_export(struct kobject *parent, const char *export_name, sysfs_bin_attr_init(attr); attr->attr.name = name; attr->attr.mode = 0400; - attr->read = export_attr_read; + attr->read = sysfs_bin_attr_simple_read; attr->private = __va(vals[0]); attr->size = vals[1]; diff --git a/drivers/acpi/bgrt.c b/drivers/acpi/bgrt.c index e4fb9e225ddfc..d1d9c9289087a 100644 --- a/drivers/acpi/bgrt.c +++ b/drivers/acpi/bgrt.c @@ -29,14 +29,7 @@ BGRT_SHOW(type, image_type); BGRT_SHOW(xoffset, image_offset_x); BGRT_SHOW(yoffset, image_offset_y); -static ssize_t image_read(struct file *file, struct kobject *kobj, - struct bin_attribute *attr, char *buf, loff_t off, size_t count) -{ - memcpy(buf, attr->private + off, count); - return count; -} - -static BIN_ATTR_RO(image, 0); /* size gets filled in later */ +static BIN_ATTR_SIMPLE_RO(image); static struct attribute *bgrt_attributes[] = { &bgrt_attr_version.attr, diff --git a/drivers/base/base.h b/drivers/base/base.h index 0738ccad08b2e..db4f910e8e36e 100644 --- a/drivers/base/base.h +++ b/drivers/base/base.h @@ -192,11 +192,14 @@ extern struct kset *devices_kset; void devices_kset_move_last(struct device *dev); #if defined(CONFIG_MODULES) && defined(CONFIG_SYSFS) -void module_add_driver(struct module *mod, struct device_driver *drv); +int module_add_driver(struct module *mod, struct device_driver *drv); void module_remove_driver(struct device_driver *drv); #else -static inline void module_add_driver(struct module *mod, - struct device_driver *drv) { } +static inline int module_add_driver(struct module *mod, + struct device_driver *drv) +{ + return 0; +} static inline void module_remove_driver(struct device_driver *drv) { } #endif diff --git a/drivers/base/bus.c b/drivers/base/bus.c index daee55c9b2d9e..ffea0728b8b2f 100644 --- a/drivers/base/bus.c +++ b/drivers/base/bus.c @@ -674,7 +674,12 @@ int bus_add_driver(struct device_driver *drv) if (error) goto out_del_list; } - module_add_driver(drv->owner, drv); + error = module_add_driver(drv->owner, drv); + if (error) { + printk(KERN_ERR "%s: failed to create module links for %s\n", + __func__, drv->name); + goto out_detach; + } error = driver_create_file(drv, &driver_attr_uevent); if (error) { @@ -699,6 +704,8 @@ int bus_add_driver(struct device_driver *drv) return 0; +out_detach: + driver_detach(drv); out_del_list: klist_del(&priv->knode_bus); out_unregister: diff --git a/drivers/base/core.c b/drivers/base/core.c index 5f4e03336e68e..4d51928c40887 100644 --- a/drivers/base/core.c +++ b/drivers/base/core.c @@ -2346,8 +2346,6 @@ static void fw_devlink_link_device(struct device *dev) /* Device links support end. */ -int (*platform_notify)(struct device *dev) = NULL; -int (*platform_notify_remove)(struct device *dev) = NULL; static struct kobject *dev_kobj; /* /sys/dev/char */ @@ -2395,16 +2393,10 @@ static void device_platform_notify(struct device *dev) acpi_device_notify(dev); software_node_notify(dev); - - if (platform_notify) - platform_notify(dev); } static void device_platform_notify_remove(struct device *dev) { - if (platform_notify_remove) - platform_notify_remove(dev); - software_node_notify_remove(dev); acpi_device_notify_remove(dev); diff --git a/drivers/base/module.c b/drivers/base/module.c index 46ad4d636731d..a1b55da07127d 100644 --- a/drivers/base/module.c +++ b/drivers/base/module.c @@ -30,14 +30,14 @@ static void module_create_drivers_dir(struct module_kobject *mk) mutex_unlock(&drivers_dir_mutex); } -void module_add_driver(struct module *mod, struct device_driver *drv) +int module_add_driver(struct module *mod, struct device_driver *drv) { char *driver_name; - int no_warn; struct module_kobject *mk = NULL; + int ret; if (!drv) - return; + return 0; if (mod) mk = &mod->mkobj; @@ -56,17 +56,37 @@ void module_add_driver(struct module *mod, struct device_driver *drv) } if (!mk) - return; + return 0; + + ret = sysfs_create_link(&drv->p->kobj, &mk->kobj, "module"); + if (ret) + return ret; - /* Don't check return codes; these calls are idempotent */ - no_warn = sysfs_create_link(&drv->p->kobj, &mk->kobj, "module"); driver_name = make_driver_name(drv); - if (driver_name) { - module_create_drivers_dir(mk); - no_warn = sysfs_create_link(mk->drivers_dir, &drv->p->kobj, - driver_name); - kfree(driver_name); + if (!driver_name) { + ret = -ENOMEM; + goto out; + } + + module_create_drivers_dir(mk); + if (!mk->drivers_dir) { + ret = -EINVAL; + goto out; } + + ret = sysfs_create_link(mk->drivers_dir, &drv->p->kobj, driver_name); + if (ret) + goto out; + + kfree(driver_name); + + return 0; +out: + sysfs_remove_link(&drv->p->kobj, "module"); + sysfs_remove_link(mk->drivers_dir, driver_name); + kfree(driver_name); + + return ret; } void module_remove_driver(struct device_driver *drv) diff --git a/drivers/firmware/dmi_scan.c b/drivers/firmware/dmi_scan.c index 015c95a825d31..3d0f773ab876b 100644 --- a/drivers/firmware/dmi_scan.c +++ b/drivers/firmware/dmi_scan.c @@ -746,16 +746,8 @@ static void __init dmi_scan_machine(void) pr_info("DMI not present or invalid.\n"); } -static ssize_t raw_table_read(struct file *file, struct kobject *kobj, - struct bin_attribute *attr, char *buf, - loff_t pos, size_t count) -{ - memcpy(buf, attr->private + pos, count); - return count; -} - -static BIN_ATTR(smbios_entry_point, S_IRUSR, raw_table_read, NULL, 0); -static BIN_ATTR(DMI, S_IRUSR, raw_table_read, NULL, 0); +static BIN_ATTR_SIMPLE_ADMIN_RO(smbios_entry_point); +static BIN_ATTR_SIMPLE_ADMIN_RO(DMI); static int __init dmi_init(void) { diff --git a/drivers/firmware/efi/rci2-table.c b/drivers/firmware/efi/rci2-table.c index de1a9a1f9f146..4fd45d6f69a4d 100644 --- a/drivers/firmware/efi/rci2-table.c +++ b/drivers/firmware/efi/rci2-table.c @@ -40,15 +40,7 @@ static u8 *rci2_base; static u32 rci2_table_len; unsigned long rci2_table_phys __ro_after_init = EFI_INVALID_TABLE_ADDR; -static ssize_t raw_table_read(struct file *file, struct kobject *kobj, - struct bin_attribute *attr, char *buf, - loff_t pos, size_t count) -{ - memcpy(buf, attr->private + pos, count); - return count; -} - -static BIN_ATTR(rci2, S_IRUSR, raw_table_read, NULL, 0); +static BIN_ATTR_SIMPLE_ADMIN_RO(rci2); static u16 checksum(void) { diff --git a/drivers/gpu/drm/i915/gvt/firmware.c b/drivers/gpu/drm/i915/gvt/firmware.c index d800d267f0e9b..221a3ae81baf5 100644 --- a/drivers/gpu/drm/i915/gvt/firmware.c +++ b/drivers/gpu/drm/i915/gvt/firmware.c @@ -51,21 +51,7 @@ struct gvt_firmware_header { #define dev_to_drm_minor(d) dev_get_drvdata((d)) -static ssize_t -gvt_firmware_read(struct file *filp, struct kobject *kobj, - struct bin_attribute *attr, char *buf, - loff_t offset, size_t count) -{ - memcpy(buf, attr->private + offset, count); - return count; -} - -static struct bin_attribute firmware_attr = { - .attr = {.name = "gvt_firmware", .mode = (S_IRUSR)}, - .read = gvt_firmware_read, - .write = NULL, - .mmap = NULL, -}; +static BIN_ATTR_SIMPLE_ADMIN_RO(gvt_firmware); static int expose_firmware_sysfs(struct intel_gvt *gvt) { @@ -108,10 +94,10 @@ static int expose_firmware_sysfs(struct intel_gvt *gvt) crc32_start = offsetof(struct gvt_firmware_header, version); h->crc32 = crc32_le(0, firmware + crc32_start, size - crc32_start); - firmware_attr.size = size; - firmware_attr.private = firmware; + bin_attr_gvt_firmware.size = size; + bin_attr_gvt_firmware.private = firmware; - ret = device_create_bin_file(&pdev->dev, &firmware_attr); + ret = device_create_bin_file(&pdev->dev, &bin_attr_gvt_firmware); if (ret) { vfree(firmware); return ret; @@ -123,8 +109,8 @@ static void clean_firmware_sysfs(struct intel_gvt *gvt) { struct pci_dev *pdev = to_pci_dev(gvt->gt->i915->drm.dev); - device_remove_bin_file(&pdev->dev, &firmware_attr); - vfree(firmware_attr.private); + device_remove_bin_file(&pdev->dev, &bin_attr_gvt_firmware); + vfree(bin_attr_gvt_firmware.private); } /** diff --git a/drivers/thermal/intel/int340x_thermal/int3400_thermal.c b/drivers/thermal/intel/int340x_thermal/int3400_thermal.c index f8ebdd19d3402..fa96972266e4b 100644 --- a/drivers/thermal/intel/int340x_thermal/int3400_thermal.c +++ b/drivers/thermal/intel/int340x_thermal/int3400_thermal.c @@ -73,14 +73,7 @@ struct odvp_attr { struct device_attribute attr; }; -static ssize_t data_vault_read(struct file *file, struct kobject *kobj, - struct bin_attribute *attr, char *buf, loff_t off, size_t count) -{ - memcpy(buf, attr->private + off, count); - return count; -} - -static BIN_ATTR_RO(data_vault, 0); +static BIN_ATTR_SIMPLE_RO(data_vault); static struct bin_attribute *data_attributes[] = { &bin_attr_data_vault, diff --git a/fs/sysfs/file.c b/fs/sysfs/file.c index 7cd64021d453d..d1995e2d6c943 100644 --- a/fs/sysfs/file.c +++ b/fs/sysfs/file.c @@ -785,3 +785,30 @@ int sysfs_emit_at(char *buf, int at, const char *fmt, ...) return len; } EXPORT_SYMBOL_GPL(sysfs_emit_at); + +/** + * sysfs_bin_attr_simple_read - read callback to simply copy from memory. + * @file: attribute file which is being read. + * @kobj: object to which the attribute belongs. + * @attr: attribute descriptor. + * @buf: destination buffer. + * @off: offset in bytes from which to read. + * @count: maximum number of bytes to read. + * + * Simple ->read() callback for bin_attributes backed by a buffer in memory. + * The @private and @size members in struct bin_attribute must be set to the + * buffer's location and size before the bin_attribute is created in sysfs. + * + * Bounds check for @off and @count is done in sysfs_kf_bin_read(). + * Negative value check for @off is done in vfs_setpos() and default_llseek(). + * + * Returns number of bytes written to @buf. + */ +ssize_t sysfs_bin_attr_simple_read(struct file *file, struct kobject *kobj, + struct bin_attribute *attr, char *buf, + loff_t off, size_t count) +{ + memcpy(buf, attr->private + off, count); + return count; +} +EXPORT_SYMBOL_GPL(sysfs_bin_attr_simple_read); diff --git a/include/linux/device.h b/include/linux/device.h index b9f5464f44ed8..07f4d2af1e3c4 100644 --- a/include/linux/device.h +++ b/include/linux/device.h @@ -1207,17 +1207,6 @@ int __must_check devm_device_add_group(struct device *dev, const struct attribute_group *grp); /* - * Platform "fixup" functions - allow the platform to have their say - * about devices and actions that the general device layer doesn't - * know about. - */ -/* Notify platform of device discovery */ -extern int (*platform_notify)(struct device *dev); - -extern int (*platform_notify_remove)(struct device *dev); - - -/* * get_device - atomically increment the reference count for the device. * */ diff --git a/include/linux/sysfs.h b/include/linux/sysfs.h index 326341c623857..a7d725fbf7393 100644 --- a/include/linux/sysfs.h +++ b/include/linux/sysfs.h @@ -371,6 +371,17 @@ struct bin_attribute bin_attr_##_name = __BIN_ATTR_ADMIN_RO(_name, _size) #define BIN_ATTR_ADMIN_RW(_name, _size) \ struct bin_attribute bin_attr_##_name = __BIN_ATTR_ADMIN_RW(_name, _size) +#define __BIN_ATTR_SIMPLE_RO(_name, _mode) { \ + .attr = { .name = __stringify(_name), .mode = _mode }, \ + .read = sysfs_bin_attr_simple_read, \ +} + +#define BIN_ATTR_SIMPLE_RO(_name) \ +struct bin_attribute bin_attr_##_name = __BIN_ATTR_SIMPLE_RO(_name, 0444) + +#define BIN_ATTR_SIMPLE_ADMIN_RO(_name) \ +struct bin_attribute bin_attr_##_name = __BIN_ATTR_SIMPLE_RO(_name, 0400) + struct sysfs_ops { ssize_t (*show)(struct kobject *, struct attribute *, char *); ssize_t (*store)(struct kobject *, struct attribute *, const char *, size_t); @@ -478,6 +489,10 @@ int sysfs_emit(char *buf, const char *fmt, ...); __printf(3, 4) int sysfs_emit_at(char *buf, int at, const char *fmt, ...); +ssize_t sysfs_bin_attr_simple_read(struct file *file, struct kobject *kobj, + struct bin_attribute *attr, char *buf, + loff_t off, size_t count); + #else /* CONFIG_SYSFS */ static inline int sysfs_create_dir_ns(struct kobject *kobj, const void *ns) diff --git a/init/initramfs.c b/init/initramfs.c index a298a3854a801..814241b648274 100644 --- a/init/initramfs.c +++ b/init/initramfs.c @@ -575,15 +575,7 @@ extern unsigned long __initramfs_size; #include <linux/initrd.h> #include <linux/kexec.h> -static ssize_t raw_read(struct file *file, struct kobject *kobj, - struct bin_attribute *attr, char *buf, - loff_t pos, size_t count) -{ - memcpy(buf, attr->private + pos, count); - return count; -} - -static BIN_ATTR(initrd, 0440, raw_read, NULL, 0); +static BIN_ATTR(initrd, 0440, sysfs_bin_attr_simple_read, NULL, 0); void __init reserve_initrd_mem(void) { diff --git a/kernel/module/sysfs.c b/kernel/module/sysfs.c index d964167c66586..26efe1305c120 100644 --- a/kernel/module/sysfs.c +++ b/kernel/module/sysfs.c @@ -146,17 +146,6 @@ struct module_notes_attrs { struct bin_attribute attrs[] __counted_by(notes); }; -static ssize_t module_notes_read(struct file *filp, struct kobject *kobj, - struct bin_attribute *bin_attr, - char *buf, loff_t pos, size_t count) -{ - /* - * The caller checked the pos and count against our size. - */ - memcpy(buf, bin_attr->private + pos, count); - return count; -} - static void free_notes_attrs(struct module_notes_attrs *notes_attrs, unsigned int i) { @@ -205,7 +194,7 @@ static void add_notes_attrs(struct module *mod, const struct load_info *info) nattr->attr.mode = 0444; nattr->size = info->sechdrs[i].sh_size; nattr->private = (void *)info->sechdrs[i].sh_addr; - nattr->read = module_notes_read; + nattr->read = sysfs_bin_attr_simple_read; ++nattr; } ++loaded; |