From mboxrd@z Thu Jan 1 00:00:00 1970 Authentication-Results: smtp.subspace.kernel.org; arc=none smtp.remote-ip=100.103.45.18 ARC-Seal: i=1; d=subspace.kernel.org; s=arc20261015; a=rsa-sha256; cv=none; t=1794047903; b=322ZECnt7sX8xGSHs8GLWPAZz90Q0jgHBT1KXyPb0zMt1wjvjBTALh99xQTbLcCjYHZW YNEEl5JhmXBmM3IQIf0YtVP8ICDkPClgXPGU6OlMstdVTYd2yPIX8oEVALa0vx4WZZ+ig fTQhwewE2yUIZzQY9Wg0kmt8dG9HnF4ciODDuJUIk+mdYeG4GDNM2Jaxu5tfjihtivyxr bXXnM/66/c90kLHgcf3mO4FPahDo9oIcQQAMNS1MtZh/GEt4diesFF0AFrgpKgnIBkfPq OqFfOgBMhOImbYf86j3zB/jCQcqAx/uo5p/0g4UdypOmBCTYo+fEK/W1/bBXhIJ2tAw== ARC-Message-Signature: i=1; d=subspace.kernel.org; s=arc20261015; a=rsa-sha256; c=relaxed/relaxed; t=1794047903; h=Received:DKIM-Signature:From:To:Cc:Subject:Date:Message-ID:X-Mailer: MIME-Version:Content-Type:Content-Transfer-Encoding; bh=NiBSg2nYLpNZqKN21CD8R1dqEFGVz6Rtcns5PziuptQ=; b=FB8Q8OTPWHFknccQxzMIq0I7jVTVHdE2GWyUDoAEvvlsGOXQrWl4NZYhAewetVEst6O2 M2e7c35rQnzvysCGfsAkyBMVCKvFXIjXvY63BnSjGGCHoQLkfc/AcICPbb98/MOtYd5np HaNqUl+TAfY/60gzIKRJJDtsoZYex1o17zAWyXtWiXNzWjKCeFahugQJPo9Kzp0duC3lN fHjwmWIkNVkzcpvOA2ZvM+mtgPs4ahS09/WA3eHT5JPGP7tMEIx7n1rlXj1WQ/xZS4eoW PgIpTOPh2kd5JzW87jvC6Lify/2KXsKh1fUync9wv11x/nGXAjdISOfORVcvItKM2bA== ARC-Authentication-Results: i=1; smtp.subspace.kernel.org; dkim=pass header.d=kernel.org header.i=@kernel.org header.a=rsa-sha256 header.s=k20260515 header.b=GzP6uLqt; arc=none smtp.remote-ip=100.103.45.18 Received: from smtp.kernel.org (quasi.space.kernel.org [100.103.45.18]) (using TLSv1.3 with cipher TLS_AES_256_GCM_SHA384 (256/256 bits) key-exchange X25519 server-signature ECDSA (prime256v1)) (No client certificate requested) by smtp.subspace.kernel.org (Postfix) with ESMTPS id AD4F1606A32F for ; Sat, 7 Nov 2026 10:38:22 +0000 (UTC) Authentication-Results: smtp.subspace.kernel.org; dkim=pass (2048-bit key) header.d=kernel.org header.i=@kernel.org header.a=rsa-sha256 header.s=k20260515 header.b=GzP6uLqt Received: by smtp.kernel.org (Postfix) with ESMTPSA id 2A2251F0089F; Sat, 7 Nov 2026 10:38:22 +0000 (UTC) DKIM-Signature: v=1; a=rsa-sha256; c=relaxed/relaxed; d=kernel.org; s=k20260515; t=1794047902; bh=NiBSg2nYLpNZqKN21CD8R1dqEFGVz6Rtcns5PziuptQ=; h=From:To:Cc:Subject:Date; b=GzP6uLqtWahgPjKcKrbffRM5C04cur9SfpSAFSAlVVxNRmU1bytG/sTFNmeRhmVXi RI0sprv9FO+Ez/gViliQ/0HrYgBKqKiYDUGcumbDA7mUBJwkM/IG06Yn6/yKQ1c2Yo 5la1TCyuWNO0TTpX3XDl8E627MeZS/aIcrgC2qQAyQBlJNKjSh3NCRXtFZIqJAF7c+ 1Ym++ZxDRT52Bs4qBnUNmybYpnN6yFYy3VEGYjaabijhoUTMMtZPzxqzSalAKCiIFv qKO3IBglUustVwLmTrYN6wT6bS/2Zar9Udh3UcAWDQXUqTVPC06Ya2E5WyVB9wVJfe NgzVpCbTFq3ZQ== From: Sasha Levin To: alexander.sverdlin@siemens.com, jarkko@kernel.org Cc: stable@vger.kernel.org Subject: FAILED: patch "[PATCH] tpm: tpm2_probe: propagate transport errors" failed to apply to 6.6-stable tree Date: Sat, 7 Nov 2026 05:38:21 -0500 Message-ID: <20261107053821-failed-6.6-7d4f1cbfe063@kernel.org> X-Mailer: git-send-email 2.53.0 X-Mailing-List: stable@vger.kernel.org List-Id: List-Post: List-Help: List-Subscribe: List-Unsubscribe: List-Owner: Precedence: list MIME-Version: 1.0 Content-Type: text/plain; charset=UTF-8 Content-Transfer-Encoding: 8bit The patch below does not apply to the 6.6-stable tree. If someone wants it applied there, or to any other stable or longterm tree, then please email the backport, including the original git commit id to . To reproduce the conflict and resubmit, you may use the following commands: git fetch https://git.kernel.org/pub/scm/linux/kernel/git/stable/linux.git/ linux-6.6.y git checkout FETCH_HEAD git cherry-pick -x 7d4f1cbfe063af5581dac66abe9e9c965e1031cc # git commit -s git send-email --to '' --in-reply-to '20261107053821-failed-6.6-7d4f1cbfe063@kernel.org' --subject-prefix 'PATCH 6.6.y' 'HEAD^..' Thanks, Sasha ------------------ original commit in Linus's tree ------------------ >From 7d4f1cbfe063af5581dac66abe9e9c965e1031cc Mon Sep 17 00:00:00 2001 From: Alexander Sverdlin Date: Thu, 1 Oct 2026 08:01:11 +0200 Subject: [PATCH] tpm: tpm2_probe: propagate transport errors tpm2_probe() reads the protocol version from the response tag and is documented to return -errno on failure, but it always returns 0. A transport error (tpm_transmit_cmd() < 0) is thus swallowed together with the intentionally ignored TPM response code, leaving TPM_CHIP_FLAG_TPM2 unset. A transient bus failure on the first command then misdetects a TPM 2.0 as a 1.2 and the probe fails on the TPM 1.2 path: tpm_tis_i2c 0-002e: 1.2 TPM (device-id 0x1C, rev-id 22) tpm tpm0: A TPM error (-62) occurred attempting to determine the timeouts Return the transport error instead; rc >= 0 still means a valid header was received and the TPM's own response code is still ignored. Fixes: 94e266ba1fa3 ("tpm: migrate tpm2_probe() to use struct tpm_buf") Cc: stable@vger.kernel.org Signed-off-by: Alexander Sverdlin Reviewed-by: Jarkko Sakkinen Link: https://lore.kernel.org/r/20261001060114.1582092-1-alexander.sverdlin@siemens.com Signed-off-by: Jarkko Sakkinen --- drivers/char/tpm/tpm2-cmd.c | 3 ++- 1 file changed, 2 insertions(+), 1 deletion(-) diff --git a/drivers/char/tpm/tpm2-cmd.c b/drivers/char/tpm/tpm2-cmd.c index ae22295df7981..119c73a603e65 100644 --- a/drivers/char/tpm/tpm2-cmd.c +++ b/drivers/char/tpm/tpm2-cmd.c @@ -483,8 +483,9 @@ int tpm2_probe(struct tpm_chip *chip) out = (struct tpm_header *)buf->data; if (be16_to_cpu(out->tag) == TPM2_ST_NO_SESSIONS) chip->flags |= TPM_CHIP_FLAG_TPM2; + return 0; } - return 0; + return rc; } EXPORT_SYMBOL_GPL(tpm2_probe); -- 2.53.0