On Thu, Mar 21, 2019 at 04:02:12PM -0700, Tadeusz Struk wrote: > The poll condition should only check response_length, > because reads should only be issued if there is data to read. > The response_read flag only prevents double writes. > The problem was that the write set the response_read to false, > enqued a tpm job, and returned. Then application called poll > which checked the response_read flag and returned EPOLLIN. > Then the application called read, but got nothing. > After all that the async_work kicked in. > Added also mutex_lock around the poll check to prevent > other possible race conditions. >
Cc: [email protected] is missing here. > Fixes: 9488585b21bef0df12 ("tpm: add support for partial reads") > Reported-by: Mantas Mikulėnas <[email protected]> > Tested-by: Mantas Mikulėnas <[email protected]> > Signed-off-by: Tadeusz Struk <[email protected]> /Jarkko
