Re: [PATCH] tpm: fix WARNING: lock held when returning to user space

On Tue, Dec 10, 2019 at 01:17:51PM -0800, Tadeusz Struk wrote:

When an application sends TPM commands in NONBLOCKING mode the driver holds chip->tpm_mutex returning from write(), which triggers WARNING: lock held when returning to user space! To silence this warning the driver needs to release the mutex and acquire it again in tpm_dev_async_work() before sending the command.

Cc: stable@vger.kernel.org Fixes: 9e1b74a63f776 (tpm: add support for nonblocking operation) Signed-off-by: Tadeusz Struk tadeusz.struk@intel.com

Bundle the patch and test into same patch set (no need for cover letter) in the case we need to iterate (as they must be in sync anyway).

/Jarkko