diff options
| author | Matt Fleming <matt.fleming@intel.com> | 2013-07-11 10:30:33 +0400 |
|---|---|---|
| committer | Matt Fleming <matt.fleming@intel.com> | 2013-07-11 14:00:31 +0400 |
| commit | d320c079efd46db1be0640d00bd6723d9e738f9f (patch) | |
| tree | a7569a0740d894e36e845971f9de35c3d9363b3c /drivers/firmware | |
| parent | 6d128e1e72bf082542e85f72e6b7ddd704193588 (diff) | |
| download | linux-d320c079efd46db1be0640d00bd6723d9e738f9f.tar.xz | |
efivars: check for EFI_RUNTIME_SERVICES
The efivars code requires EFI runtime services to function, so check
that they are enabled.
This fixes a crash when booting with the "noefi" kernel parameter, and
also when mixing kernel and firmware "bitness", e.g. 32-bit kernel with
64-bit firmware.
Tested-by: Dave Young <dyoung@redhat.com>
Signed-off-by: Matt Fleming <matt.fleming@intel.com>
Diffstat (limited to 'drivers/firmware')
| -rw-r--r-- | drivers/firmware/efi/efivars.c | 3 |
1 files changed, 3 insertions, 0 deletions
diff --git a/drivers/firmware/efi/efivars.c b/drivers/firmware/efi/efivars.c index 8bd1bb6dbe47..8a7432a4b413 100644 --- a/drivers/firmware/efi/efivars.c +++ b/drivers/firmware/efi/efivars.c @@ -583,6 +583,9 @@ int efivars_sysfs_init(void) struct kobject *parent_kobj = efivars_kobject(); int error = 0; + if (!efi_enabled(EFI_RUNTIME_SERVICES)) + return -ENODEV; + /* No efivars has been registered yet */ if (!parent_kobj) return 0; |