From: "Lee, Chun-Yi" <joeyli.kernel@xxxxxxxxx>
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@xxxxxxxxxx>
Cc: H. Peter Anvin <hpa@xxxxxxxxx>
Signed-off-by: Lee, Chun-Yi <jlee@xxxxxxxx>
Signed-off-by: Jeremy Kerr <jeremy.kerr@xxxxxxxxxxxxx>
Signed-off-by: Matt Fleming <matt.fleming@xxxxxxxxx>
---
v2: Address comments from Alan Cox where efivars->kset was unregistered
in the success path, not the error path.
drivers/firmware/efivars.c | 9 +++++++++
include/linux/efi.h | 1 +
2 files changed, 10 insertions(+)
diff --git a/drivers/firmware/efivars.c b/drivers/firmware/efivars.c
index d7658b4..6793965 100644
--- a/drivers/firmware/efivars.c
+++ b/drivers/firmware/efivars.c
@@ -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.
diff --git a/include/linux/efi.h b/include/linux/efi.h
index b2af157..337aefb 100644
--- a/include/linux/efi.h
+++ b/include/linux/efi.h
@@ -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;
--
1.7.11.7
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