diff options
Diffstat (limited to 'drivers/extcon/extcon.c')
-rw-r--r-- | drivers/extcon/extcon.c | 111 |
1 files changed, 65 insertions, 46 deletions
diff --git a/drivers/extcon/extcon.c b/drivers/extcon/extcon.c index 2fa033711a55..72591af2fec2 100644 --- a/drivers/extcon/extcon.c +++ b/drivers/extcon/extcon.c @@ -1071,6 +1071,66 @@ void extcon_dev_free(struct extcon_dev *edev) EXPORT_SYMBOL_GPL(extcon_dev_free); /** + * extcon_alloc_cables() - alloc the cables for extcon device + * @edev: extcon device which has cables + * + * Returns 0 if success or error number if fail. + */ +static int extcon_alloc_cables(struct extcon_dev *edev) +{ + int index; + char *str; + struct extcon_cable *cable; + + if (!edev) + return -EINVAL; + + if (!edev->max_supported) + return 0; + + edev->cables = kcalloc(edev->max_supported, + sizeof(struct extcon_cable), + GFP_KERNEL); + if (!edev->cables) + return -ENOMEM; + + for (index = 0; index < edev->max_supported; index++) { + cable = &edev->cables[index]; + + str = kasprintf(GFP_KERNEL, "cable.%d", index); + if (!str) { + for (index--; index >= 0; index--) { + cable = &edev->cables[index]; + kfree(cable->attr_g.name); + } + + kfree(edev->cables); + return -ENOMEM; + } + + cable->edev = edev; + cable->cable_index = index; + cable->attrs[0] = &cable->attr_name.attr; + cable->attrs[1] = &cable->attr_state.attr; + cable->attrs[2] = NULL; + cable->attr_g.name = str; + cable->attr_g.attrs = cable->attrs; + + sysfs_attr_init(&cable->attr_name.attr); + cable->attr_name.attr.name = "name"; + cable->attr_name.attr.mode = 0444; + cable->attr_name.show = cable_name_show; + + sysfs_attr_init(&cable->attr_state.attr); + cable->attr_state.attr.name = "state"; + cable->attr_state.attr.mode = 0444; + cable->attr_state.show = cable_state_show; + } + + return 0; +} + +/** * extcon_dev_register() - Register an new extcon device * @edev: the extcon device to be registered * @@ -1117,50 +1177,9 @@ int extcon_dev_register(struct extcon_dev *edev) dev_set_name(&edev->dev, "extcon%lu", (unsigned long)atomic_inc_return(&edev_no)); - if (edev->max_supported) { - char *str; - struct extcon_cable *cable; - - edev->cables = kcalloc(edev->max_supported, - sizeof(struct extcon_cable), - GFP_KERNEL); - if (!edev->cables) { - ret = -ENOMEM; - goto err_sysfs_alloc; - } - for (index = 0; index < edev->max_supported; index++) { - cable = &edev->cables[index]; - - str = kasprintf(GFP_KERNEL, "cable.%d", index); - if (!str) { - for (index--; index >= 0; index--) { - cable = &edev->cables[index]; - kfree(cable->attr_g.name); - } - ret = -ENOMEM; - - goto err_alloc_cables; - } - - cable->edev = edev; - cable->cable_index = index; - cable->attrs[0] = &cable->attr_name.attr; - cable->attrs[1] = &cable->attr_state.attr; - cable->attrs[2] = NULL; - cable->attr_g.name = str; - cable->attr_g.attrs = cable->attrs; - - sysfs_attr_init(&cable->attr_name.attr); - cable->attr_name.attr.name = "name"; - cable->attr_name.attr.mode = 0444; - cable->attr_name.show = cable_name_show; - - sysfs_attr_init(&cable->attr_state.attr); - cable->attr_state.attr.name = "state"; - cable->attr_state.attr.mode = 0444; - cable->attr_state.show = cable_state_show; - } - } + ret = extcon_alloc_cables(edev); + if (ret < 0) + goto err_alloc_cables; if (edev->max_supported && edev->mutually_exclusive) { char *name; @@ -1279,10 +1298,10 @@ err_alloc_groups: err_muex: for (index = 0; index < edev->max_supported; index++) kfree(edev->cables[index].attr_g.name); -err_alloc_cables: if (edev->max_supported) kfree(edev->cables); -err_sysfs_alloc: +err_alloc_cables: + return ret; } EXPORT_SYMBOL_GPL(extcon_dev_register); |