diff options
| author | Jarkko Sakkinen <jarkko@kernel.org> | 2023-04-26 20:29:28 +0300 |
|---|---|---|
| committer | Jarkko Sakkinen <jarkko@kernel.org> | 2023-05-16 02:43:12 +0300 |
| commit | 99d46450625590d410f86fe4660a5eff7d3b8343 (patch) | |
| tree | 446c3d6a59c7a4a8762954ee3e527ff0b257d686 /include | |
| parent | 1398aa803f198b7a386fdd8404666043e95f4c16 (diff) | |
tpm: Prevent hwrng from activating during resume
Set TPM_CHIP_FLAG_SUSPENDED in tpm_pm_suspend() and reset in
tpm_pm_resume(). While the flag is set, tpm_hwrng() gives back zero
bytes. This prevents hwrng from racing during resume.
Cc: stable@vger.kernel.org
Fixes: 6e592a065d51 ("tpm: Move Linux RNG connection to hwrng")
Reviewed-by: Jerry Snitselaar <jsnitsel@redhat.com>
Signed-off-by: Jarkko Sakkinen <jarkko@kernel.org>
Diffstat (limited to 'include')
| -rw-r--r-- | include/linux/tpm.h | 1 |
1 files changed, 1 insertions, 0 deletions
diff --git a/include/linux/tpm.h b/include/linux/tpm.h index 77693389c3f9..6a1e8f157255 100644 --- a/include/linux/tpm.h +++ b/include/linux/tpm.h @@ -282,6 +282,7 @@ enum tpm_chip_flags { TPM_CHIP_FLAG_ALWAYS_POWERED = BIT(5), TPM_CHIP_FLAG_FIRMWARE_POWER_MANAGED = BIT(6), TPM_CHIP_FLAG_FIRMWARE_UPGRADE = BIT(7), + TPM_CHIP_FLAG_SUSPENDED = BIT(8), }; #define to_tpm_chip(d) container_of(d, struct tpm_chip, dev) |