Re: [PATCH 4.19 001/106] tpm: use tpm_try_get_ops() in tpm-sysfs.c.

On Tue, Oct 08, 2019 at 02:51:20PM +0200, Pavel Machek wrote:

For example this did not have any locking, and is now protected by

    get_device(&chip->dev);

    down_read(&chip->ops_sem);

. Is that intended? Is this known to fix any bugs?

It is, sysfs code can otherwise race when ops is set NULL in class shutdown.

/Jarkko