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efi: add efivars kobject to efi sysfs folder

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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 <[email protected]>
Cc: H. Peter Anvin <[email protected]>
Signed-off-by: Lee, Chun-Yi <[email protected]>
Signed-off-by: Jeremy Kerr <[email protected]>
Signed-off-by: Matt Fleming <[email protected]>
This commit is contained in:
Lee, Chun-Yi 2012-10-05 13:54:56 +08:00 • committed by Matt Fleming
commit 605e70c7aa
2 changed files with 10 additions and 0 deletions
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9
drivers/firmware/efivars.c
View file

@ -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.