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| author | Alexander Usyskin <alexander.usyskin@intel.com> | 2017-01-11 01:27:21 +0200 |
|---|---|---|
| committer | Greg Kroah-Hartman <gregkh@linuxfoundation.org> | 2017-01-11 07:43:57 +0100 |
| commit | 7ee7f45a763bd68c3a606595a8c1bb08c3e6146b (patch) | |
| tree | a42e4971126677c3758e46e4e0f0a20a8d8d41f5 /drivers/misc/mei/bus-fixup.c | |
| parent | a121103c922847ba5010819a3f250f1f7fc84ab8 (diff) | |
| download | linux-7ee7f45a763bd68c3a606595a8c1bb08c3e6146b.tar.bz2 | |
mei: bus: enable OS version only for SPT and newer
Sending OS version for support of TPM2_ChangeEPS() is required only
for SPT FW (HMB version 2.0) and newer.
On older platforms the command should be just ignored by the firmware
but some older platforms misbehave so it's safer to send the command
only if required.
Bugzilla: https://bugzilla.kernel.org/show_bug.cgi?id=192051
Fixes: 7279b238bade (mei: send OS type to the FW)
Signed-off-by: Alexander Usyskin <alexander.usyskin@intel.com>
Signed-off-by: Tomas Winkler <tomas.winkler@intel.com>
Tested-by: Jan Niehusmann <jan@gondor.com>
Signed-off-by: Greg Kroah-Hartman <gregkh@linuxfoundation.org>
Diffstat (limited to 'drivers/misc/mei/bus-fixup.c')
| -rw-r--r-- | drivers/misc/mei/bus-fixup.c | 3 |
1 files changed, 3 insertions, 0 deletions
diff --git a/drivers/misc/mei/bus-fixup.c b/drivers/misc/mei/bus-fixup.c index 18e05ca7584f..3600c9993a98 100644 --- a/drivers/misc/mei/bus-fixup.c +++ b/drivers/misc/mei/bus-fixup.c @@ -152,6 +152,9 @@ static void mei_mkhi_fix(struct mei_cl_device *cldev) { int ret; + if (!cldev->bus->hbm_f_os_supported) + return; + ret = mei_cldev_enable(cldev); if (ret) return; |