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| author | Jarkko Sakkinen <[email protected]> | 2021-02-19 22:55:59 +0000 |
|---|---|---|
| committer | Jarkko Sakkinen <[email protected]> | 2021-02-24 16:53:22 +0000 |
| commit | a5665ec2affdba21bff3b0d4d3aed83b3951e8ff (patch) | |
| tree | 587214574562dd8c303345d756891792cee3ce1a /drivers/gpu/drm/amd/amdgpu/amdgpu_gem.c | |
| parent | Merge tag 'keys-misc-20210126' of git://git.kernel.org/pub/scm/linux/kernel/g... (diff) | |
| download | kernel-a5665ec2affdba21bff3b0d4d3aed83b3951e8ff.tar.gz kernel-a5665ec2affdba21bff3b0d4d3aed83b3951e8ff.zip | |
tpm, tpm_tis: Decorate tpm_get_timeouts() with request_locality()
This is shown with Samsung Chromebook Pro (Caroline) with TPM 1.2
(SLB 9670):
[ 4.324298] TPM returned invalid status
[ 4.324806] WARNING: CPU: 2 PID: 1 at drivers/char/tpm/tpm_tis_core.c:275 tpm_tis_status+0x86/0x8f
Background
==========
TCG PC Client Platform TPM Profile (PTP) Specification, paragraph 6.1 FIFO
Interface Locality Usage per Register, Table 39 Register Behavior Based on
Locality Setting for FIFO - a read attempt to TPM_STS_x Registers returns
0xFF in case of lack of locality.
The fix
=======
Decorate tpm_get_timeouts() with request_locality() and release_locality().
Fixes: a3fbfae82b4c ("tpm: take TPM chip power gating out of tpm_transmit()")
Cc: James Bottomley <[email protected]>
Cc: Guenter Roeck <[email protected]>
Cc: Laurent Bigonville <[email protected]>
Cc: [email protected]
Reported-by: Lukasz Majczak <[email protected]>
Signed-off-by: Jarkko Sakkinen <[email protected]>
Diffstat (limited to 'drivers/gpu/drm/amd/amdgpu/amdgpu_gem.c')
0 files changed, 0 insertions, 0 deletions