On Fri, Apr 04, 2025 at 09:51:29AM +0200, Michal Suchánek wrote: > On Thu, Apr 03, 2025 at 09:43:19PM +0100, Jonathan McDowell wrote: > > On Thu, Apr 03, 2025 at 09:45:21PM +0300, Jarkko Sakkinen wrote: > > > On Wed, Apr 02, 2025 at 06:45:40PM +0100, Jonathan McDowell wrote: > > > > On Wed, Apr 02, 2025 at 07:21:30PM +0200, Michal Suchanek wrote: > > > > > With some Infineon chips the timeouts in tpm_tis_send_data (both B and > > > > > C) can reach up to about 2250 ms. > > > > > > > > > > Extend the timeout duration to accommodate this. > > > > > > > > The problem here is the bump of timeout_c is going to interact poorly > > > > with > > > > the Infineon errata workaround, as now we'll wait 4s instead of 200ms to > > > > detect the stuck status change. > > > > > > > > (Also shouldn't timeout_c already end up as 750ms, as it's > > > > max(TIS_SHORT_TIMEOUT, TPM2_TIMEOUT_C), and TIS_SHORT_TIMEOUT is 750 vs > > > > 200 > > > > for TPM2_TIMEOUT_C? That doesn't seem to be borne out by your logs, nor > > > > my > > > > results.) > > > > > > Just noticed that the commit did not end up having fixes etc. tags: > > > > > > https://web.git.kernel.org/pub/scm/linux/kernel/git/jarkko/linux-tpmdd.git/commit/?id=de9e33df7762abbfc2a1568291f2c3a3154c6a9d > > > > > > Should we forward to stable? > > > > It's a TPM bug rather than a kernel issue, so I don't think there's a valid > > Fixes: for it, but it's certainly stable material in my mind. > > In the more general sense of Fixes: indicating where the fix is > applicable it would be any kernel that supports TPM2.
I tried applying the patch on 6.1-stable: ~/work/kernel.org/stable/linux tags/v6.1.132 $ git am -3 ~/Downloads/infineon.patch Applying: tpm, tpm_tis: Workaround failed command reception on Infineon devices Using index info to reconstruct a base tree... M drivers/char/tpm/tpm_tis_core.c M drivers/char/tpm/tpm_tis_core.h M include/linux/tpm.h Falling back to patching base and 3-way merge... Auto-merging include/linux/tpm.h Auto-merging drivers/char/tpm/tpm_tis_core.h Auto-merging drivers/char/tpm/tpm_tis_core.c If no counter-opinions, I'd add: sta...@vger.kernel.org # v6.1+ I based this on Bookworm kernel. > > Thanks > > Michal BR, Jarkko
