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Commit 605e70c7 authored by Lee, Chun-Yi's avatar Lee, Chun-Yi Committed by Matt Fleming
Browse files

efi: add efivars kobject to efi sysfs folder 



UEFI variable filesystem need a new mount point, so this patch add
efivars kobject to efi_kobj for create a /sys/firmware/efi/efivars
folder.

Cc: Matthew Garrett <mjg@redhat.com>
Cc: H. Peter Anvin <hpa@zytor.com>
Signed-off-by: default avatarLee, Chun-Yi <jlee@suse.com>
Signed-off-by: default avatarJeremy Kerr <jeremy.kerr@canonical.com>
Signed-off-by: default avatarMatt Fleming <matt.fleming@intel.com>
parent 0c542edd

drivers/firmware/efivars.c

+9 −0
Original line number Diff line number Diff line
@@ -1527,6 +1527,7 @@ void unregister_efivars(struct efivars *efivars) 
		sysfs_remove_bin_file(&efivars->kset->kobj, efivars->del_var);

	kfree(efivars->new_var);

	kfree(efivars->del_var);

	kobject_put(efivars->kobject);

	kset_unregister(efivars->kset);

}

EXPORT_SYMBOL_GPL(unregister_efivars);
@@ -1558,6 +1559,14 @@ int register_efivars(struct efivars *efivars, 
		goto out;

	}



	efivars->kobject = kobject_create_and_add("efivars", parent_kobj);

	if (!efivars->kobject) {

		pr_err("efivars: Subsystem registration failed.\n");

		error = -ENOMEM;

		kset_unregister(efivars->kset);

		goto out;

	}



	/*

	 * Per EFI spec, the maximum storage allocated for both

	 * the variable name and variable data is 1024 bytes.

include/linux/efi.h

+1 −0
Original line number Diff line number Diff line
@@ -662,6 +662,7 @@ struct efivars { 
	spinlock_t lock;

	struct list_head list;

	struct kset *kset;

	struct kobject *kobject;

	struct bin_attribute *new_var, *del_var;

	const struct efivar_operations *ops;

	struct efivar_entry *walk_entry;