This reverts commit d23d12484307b40eea549b8a858f5fffad913897. This commit has caused regressions for the XPS 9560 containing a Nuvoton TPM.
As mentioned by the reporter all TPM2 commands are failing with: ERROR:tcti:src/tss2-tcti/tcti-device.c:290:tcti_device_receive() Failed to read response from fd 3, got errno 1: Operation not permitted The reporter bisected this issue back to this commit which was backported to stable as commit 4d6ebc4. Cc: Jeffrin Jose T <jeff...@rajagiritech.edu.in> BugLink: https://bugzilla.kernel.org/show_bug.cgi?id=206275 Fixes: d23d124 ("tpm: fix invalid locking in NONBLOCKING mode") Reported-by: Alex Guzman <a...@guzman.io> Signed-off-by: Mario Limonciello <mario.limoncie...@dell.com> --- drivers/char/tpm/tpm-dev-common.c | 8 -------- 1 file changed, 8 deletions(-) diff --git a/drivers/char/tpm/tpm-dev-common.c b/drivers/char/tpm/tpm-dev-common.c index 87f449340202..bc9d7c7ddc01 100644 --- a/drivers/char/tpm/tpm-dev-common.c +++ b/drivers/char/tpm/tpm-dev-common.c @@ -61,12 +61,6 @@ static void tpm_dev_async_work(struct work_struct *work) mutex_lock(&priv->buffer_mutex); priv->command_enqueued = false; - ret = tpm_try_get_ops(priv->chip); - if (ret) { - priv->response_length = ret; - goto out; - } - ret = tpm_dev_transmit(priv->chip, priv->space, priv->data_buffer, sizeof(priv->data_buffer)); tpm_put_ops(priv->chip); @@ -74,7 +68,6 @@ static void tpm_dev_async_work(struct work_struct *work) priv->response_length = ret; mod_timer(&priv->user_read_timer, jiffies + (120 * HZ)); } -out: mutex_unlock(&priv->buffer_mutex); wake_up_interruptible(&priv->async_wait); } @@ -211,7 +204,6 @@ ssize_t tpm_common_write(struct file *file, const char __user *buf, if (file->f_flags & O_NONBLOCK) { priv->command_enqueued = true; queue_work(tpm_dev_wq, &priv->async_work); - tpm_put_ops(priv->chip); mutex_unlock(&priv->buffer_mutex); return size; } -- 2.25.1
