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path: root/drivers/firmware
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Diffstat (limited to 'drivers/firmware')
-rw-r--r--drivers/firmware/efivars.c62
1 files changed, 36 insertions, 26 deletions
diff --git a/drivers/firmware/efivars.c b/drivers/firmware/efivars.c
index a93e401c20a7..277e42616f0d 100644
--- a/drivers/firmware/efivars.c
+++ b/drivers/firmware/efivars.c
@@ -653,6 +653,36 @@ static int efivarfs_file_open(struct inode *inode, struct file *file)
return 0;
}
+static int efi_status_to_err(efi_status_t status)
+{
+ int err;
+
+ switch (status) {
+ case EFI_INVALID_PARAMETER:
+ err = -EINVAL;
+ break;
+ case EFI_OUT_OF_RESOURCES:
+ err = -ENOSPC;
+ break;
+ case EFI_DEVICE_ERROR:
+ err = -EIO;
+ break;
+ case EFI_WRITE_PROTECTED:
+ err = -EROFS;
+ break;
+ case EFI_SECURITY_VIOLATION:
+ err = -EACCES;
+ break;
+ case EFI_NOT_FOUND:
+ err = -ENOENT;
+ break;
+ default:
+ err = -EINVAL;
+ }
+
+ return err;
+}
+
static ssize_t efivarfs_file_write(struct file *file,
const char __user *userbuf, size_t count, loff_t *ppos)
{
@@ -711,29 +741,7 @@ static ssize_t efivarfs_file_write(struct file *file,
spin_unlock(&efivars->lock);
kfree(data);
- switch (status) {
- case EFI_INVALID_PARAMETER:
- count = -EINVAL;
- break;
- case EFI_OUT_OF_RESOURCES:
- count = -ENOSPC;
- break;
- case EFI_DEVICE_ERROR:
- count = -EIO;
- break;
- case EFI_WRITE_PROTECTED:
- count = -EROFS;
- break;
- case EFI_SECURITY_VIOLATION:
- count = -EACCES;
- break;
- case EFI_NOT_FOUND:
- count = -ENOENT;
- break;
- default:
- count = -EINVAL;
- }
- return count;
+ return efi_status_to_err(status);
}
/*
@@ -791,12 +799,12 @@ static ssize_t efivarfs_file_read(struct file *file, char __user *userbuf,
spin_unlock(&efivars->lock);
if (status != EFI_BUFFER_TOO_SMALL)
- return 0;
+ return efi_status_to_err(status);
data = kmalloc(datasize + 4, GFP_KERNEL);
if (!data)
- return 0;
+ return -ENOMEM;
spin_lock(&efivars->lock);
status = efivars->ops->get_variable(var->var.VariableName,
@@ -805,8 +813,10 @@ static ssize_t efivarfs_file_read(struct file *file, char __user *userbuf,
(data + 4));
spin_unlock(&efivars->lock);
- if (status != EFI_SUCCESS)
+ if (status != EFI_SUCCESS) {
+ size = efi_status_to_err(status);
goto out_free;
+ }
memcpy(data, &attributes, 4);
size = simple_read_from_buffer(userbuf, count, ppos,