From: Jarkko Sakkinen <jarkko.sakkinen@linux.intel.com>
To: linux-integrity@vger.kernel.org
Cc: Stefan Berger <stefanb@linux.ibm.com>,
stable@vger.kernel.org, Jerry Snitselaar <jsnitsel@redhat.com>,
Dan Williams <dan.j.williams@intel.com>,
Xiaoping Zhou <xiaoping.zhou@intel.com>,
Jarkko Sakkinen <jarkko.sakkinen@linux.intel.com>,
Peter Huewe <peterhuewe@gmx.de>, Jason Gunthorpe <jgg@ziepe.ca>,
Arnd Bergmann <arnd@arndb.de>,
Greg Kroah-Hartman <gregkh@linuxfoundation.org>,
linux-kernel@vger.kernel.org (open list)
Subject: [PATCH for-linus-v5.5-rc6 2/3] tpm: Revert "tpm_tis_core: Set TPM_CHIP_FLAG_IRQ before probing for interrupts"
Date: Sat, 4 Jan 2020 01:29:33 +0200 [thread overview]
Message-ID: <20200103232935.11314-3-jarkko.sakkinen@linux.intel.com> (raw)
In-Reply-To: <20200103232935.11314-1-jarkko.sakkinen@linux.intel.com>
From: Stefan Berger <stefanb@linux.ibm.com>
There has been a bunch of reports (one from kernel bugzilla linked)
reporting that when this commit is applied it causes on some machines
boot freezes.
Unfortunately hardware where this commit causes a failure is not widely
available (only one I'm aware is Lenovo T490), which means we cannot
predict yet how long it will take to properly fix tpm_tis interrupt
probing.
Thus, the least worst short term action is to revert the code to the
state before this commit. In long term we need fix the tpm_tis probing
code to work on machines that Stefan's fix was supposed to fix.
Link: https://bugzilla.kernel.org/show_bug.cgi?id=205935
Fixes: 1ea32c83c699 ("tpm_tis_core: Set TPM_CHIP_FLAG_IRQ before probing for interrupts")
Cc: stable@vger.kernel.org
Cc: Jerry Snitselaar <jsnitsel@redhat.com>
Cc: Dan Williams <dan.j.williams@intel.com>
Tested-by: Dan Williams <dan.j.williams@intel.com>
Tested-by: Xiaoping Zhou <xiaoping.zhou@intel.com>
Signed-off-by: Stefan Berger <stefanb@linux.ibm.com>
Reported-by: Jerry Snitselaar <jsnitsel@redhat.com>
Signed-off-by: Jarkko Sakkinen <jarkko.sakkinen@linux.intel.com>
---
drivers/char/tpm/tpm_tis_core.c | 1 -
1 file changed, 1 deletion(-)
diff --git a/drivers/char/tpm/tpm_tis_core.c b/drivers/char/tpm/tpm_tis_core.c
index 8af2cee1a762..5dc52c4e2292 100644
--- a/drivers/char/tpm/tpm_tis_core.c
+++ b/drivers/char/tpm/tpm_tis_core.c
@@ -1060,7 +1060,6 @@ int tpm_tis_core_init(struct device *dev, struct tpm_tis_data *priv, int irq,
}
tpm_chip_start(chip);
- chip->flags |= TPM_CHIP_FLAG_IRQ;
if (irq) {
tpm_tis_probe_irq_single(chip, intmask, IRQF_SHARED,
irq);
--
2.20.1
next prev parent reply other threads:[~2020-01-03 23:30 UTC|newest]
Thread overview: 6+ messages / expand[flat|nested] mbox.gz Atom feed top
2020-01-03 23:29 [PATCH for-linus-v5.5-rc6 0/3] TPM changes for v5.5-rc6 Jarkko Sakkinen
2020-01-03 23:29 ` [PATCH for-linus-v5.5-rc6 1/3] tpm: Revert "tpm_tis: reserve chip for duration of tpm_tis_core_init" Jarkko Sakkinen
2020-01-03 23:29 ` Jarkko Sakkinen [this message]
2020-01-03 23:29 ` [PATCH for-linus-v5.5-rc6 3/3] tpm: Revert "tpm_tis_core: Turn on the TPM before probing IRQ's" Jarkko Sakkinen
2020-01-04 4:32 ` [PATCH for-linus-v5.5-rc6 0/3] TPM changes for v5.5-rc6 Jerry Snitselaar
2020-01-06 17:44 ` Jarkko Sakkinen
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