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author | Mike Waychison <mikew@google.com> | 2011-03-11 17:43:06 -0800 |
---|---|---|
committer | Greg Kroah-Hartman <gregkh@suse.de> | 2011-03-14 08:40:50 -0700 |
commit | d502fbb0dc4d4babe5fb330257fa49a83fbf86a6 (patch) | |
tree | 881fa3719f41f6f0f2a7ab22a3a479789590d48c /drivers/firmware | |
parent | 29422693c410c68071bdd60e0a0ec590490781aa (diff) | |
download | kernel_samsung_crespo-d502fbb0dc4d4babe5fb330257fa49a83fbf86a6.zip kernel_samsung_crespo-d502fbb0dc4d4babe5fb330257fa49a83fbf86a6.tar.gz kernel_samsung_crespo-d502fbb0dc4d4babe5fb330257fa49a83fbf86a6.tar.bz2 |
efivars: Make efivars bin_attributes dynamic
In preparation for encapsulating efivars, we need to have the
bin_attributes be dynamically allocated so that we can use their
->private fields to get back to the struct efivars structure.
Signed-off-by: Mike Waychison <mikew@google.com>
Cc: Matt Domsch <Matt_Domsch@dell.com>,
Signed-off-by: Greg Kroah-Hartman <gregkh@suse.de>
Diffstat (limited to 'drivers/firmware')
-rw-r--r-- | drivers/firmware/efivars.c | 93 |
1 files changed, 68 insertions, 25 deletions
diff --git a/drivers/firmware/efivars.c b/drivers/firmware/efivars.c index f10ecb6..528ce47 100644 --- a/drivers/firmware/efivars.c +++ b/drivers/firmware/efivars.c @@ -101,6 +101,7 @@ struct efivars { spinlock_t lock; struct list_head list; struct kset *kset; + struct bin_attribute *new_var, *del_var; }; static struct efivars __efivars; static struct efivars *efivars = &__efivars; @@ -525,16 +526,6 @@ static ssize_t efivar_delete(struct file *filp, struct kobject *kobj, return count; } -static struct bin_attribute var_subsys_attr_new_var = { - .attr = {.name = "new_var", .mode = 0200}, - .write = efivar_create, -}; - -static struct bin_attribute var_subsys_attr_del_var = { - .attr = {.name = "del_var", .mode = 0200}, - .write = efivar_delete, -}; - /* * Let's not leave out systab information that snuck into * the efivars driver @@ -640,6 +631,66 @@ efivar_create_sysfs_entry(unsigned long variable_name_size, return 0; } + +static int +create_efivars_bin_attributes(struct efivars *efivars) +{ + struct bin_attribute *attr; + int error; + + /* new_var */ + attr = kzalloc(sizeof(*attr), GFP_KERNEL); + if (!attr) + return -ENOMEM; + + attr->attr.name = "new_var"; + attr->attr.mode = 0200; + attr->write = efivar_create; + attr->private = efivars; + efivars->new_var = attr; + + /* del_var */ + attr = kzalloc(sizeof(*attr), GFP_KERNEL); + if (!attr) { + error = -ENOMEM; + goto out_free; + } + attr->attr.name = "del_var"; + attr->attr.mode = 0200; + attr->write = efivar_delete; + attr->private = efivars; + efivars->del_var = attr; + + sysfs_bin_attr_init(efivars->new_var); + sysfs_bin_attr_init(efivars->del_var); + + /* Register */ + error = sysfs_create_bin_file(&efivars->kset->kobj, + efivars->new_var); + if (error) { + printk(KERN_ERR "efivars: unable to create new_var sysfs file" + " due to error %d\n", error); + goto out_free; + } + error = sysfs_create_bin_file(&efivars->kset->kobj, + efivars->del_var); + if (error) { + printk(KERN_ERR "efivars: unable to create del_var sysfs file" + " due to error %d\n", error); + sysfs_remove_bin_file(&efivars->kset->kobj, + efivars->new_var); + goto out_free; + } + + return 0; +out_free: + kfree(efivars->new_var); + efivars->new_var = NULL; + kfree(efivars->new_var); + efivars->new_var = NULL; + return error; +} + /* * For now we register the efi subsystem with the firmware subsystem * and the vars subsystem with the efi subsystem. In the future, it @@ -714,20 +765,7 @@ efivars_init(void) } } while (status != EFI_NOT_FOUND); - /* - * Now add attributes to allow creation of new vars - * and deletion of existing ones... - */ - error = sysfs_create_bin_file(&efivars->kset->kobj, - &var_subsys_attr_new_var); - if (error) - printk(KERN_ERR "efivars: unable to create new_var sysfs file" - " due to error %d\n", error); - error = sysfs_create_bin_file(&efivars->kset->kobj, - &var_subsys_attr_del_var); - if (error) - printk(KERN_ERR "efivars: unable to create del_var sysfs file" - " due to error %d\n", error); + error = create_efivars_bin_attributes(efivars); /* Don't forget the systab entry */ error = sysfs_create_group(efi_kobj, &efi_subsys_attr_group); @@ -758,7 +796,12 @@ efivars_exit(void) spin_unlock(&efivars->lock); efivar_unregister(entry); } - + if (efivars->new_var) + sysfs_remove_bin_file(&efivars->kset->kobj, efivars->new_var); + if (efivars->del_var) + sysfs_remove_bin_file(&efivars->kset->kobj, efivars->del_var); + kfree(efivars->new_var); + kfree(efivars->del_var); kset_unregister(efivars->kset); kobject_put(efi_kobj); } |