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=1794049851; b=PlHpQDwaheMcshqyoucxkggVYzxluNK5/6eI0WnYmVhJTAXMNNZQHVUPLPWnkgKNJtpm GlRr2zNdLML6Dsm031HMwDZuQc4AFlwXbtD0T2ukdNN/yxUp3Jtp3oGwC1hAiTkD4Rqme ynuM9ENfk6o/LioWDnyVlcZkYFlD9gWKOfRnwRj/uMxvyA44V9LjtWUCmD0C4a2Id0TFi bOfDA85fpTN2IZHLQ69o6Hqk2L4cNlP7ZktPIusqezQh7Dz6Ied3DsXLmX3KHbj1AcQGQ tADZtuyMiA2O46SMDl3W1x1pwc9MmI/0M+T0H2FtOFJUcLTv7AYPwV4DDmCTPT7FMrw== ARC-Message-Signature: i=1; d=subspace.kernel.org; s=arc20261015; a=rsa-sha256; c=relaxed/relaxed; t=1794049851; h=Received:DKIM-Signature:From:To:Cc:Subject:Date:Message-ID:X-Mailer: MIME-Version:Content-Type:Content-Transfer-Encoding; bh=9mUD9QEAV3EQ7QfIHSx0J3IbaaIHloZdkRpys5JUtfo=; b=0a/BjVVCjs9tROIO/aOOStJ4nKDI7LEX7F8kUJwtQliSFeS7a+gH2BuW7hcD+TtETyJz /5cIlBJ1BpwyWn5OAjNAN7rFGimghHaHDdI6pe/xfmg55EXe3gNyDZX9myudcNuwpYKwu SI/zf8OtEPfrGQlFU1+Mlv789WUhQkNODis4QNyX4z6zYFhGT8Dpr8t1Dh/FZy3Otl3Yc qa3HX3ojH5GJmPGogjmeylpu/t+mHWXnpWXEYY3DTyCKBmHzXLiI1IHqD6JBjxppqocns HJ0CYaCzo8lF14WTWdjU/bFTgAp8jBdgakTnWfTjc4VAIaKp5TpaCf/LfPFZrbQKYeA== 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="TI/md936"; 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 3883C606A326 for ; Sat, 7 Nov 2026 11:10:51 +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=TI/md936 Received: by smtp.kernel.org (Postfix) with ESMTPSA id A7E391F008A1; Sat, 7 Nov 2026 11:10:50 +0000 (UTC) DKIM-Signature: v=1; a=rsa-sha256; c=relaxed/relaxed; d=kernel.org; s=k20260515; t=1794049851; bh=9mUD9QEAV3EQ7QfIHSx0J3IbaaIHloZdkRpys5JUtfo=; h=From:To:Cc:Subject:Date; b=TI/md936ThbguI6UtcD07ysu4APRewTeXyr6hkFAEQFi106dTTrQRO867+wgpKrM0 hZKdH5vllrIkss/lkud3yRcQpi8OGe82Iv9SGb+yEBTDB4anUo+Ib/8bgR+trSz6Tt yTKBBTycnCMuqboGXbG+bTZyGL6WVFN+cDf0EOhnbhJpjjn2JWY/kyVuw2SLY0d4bI StYXT8hPFtCH3HbeFGUhJjKSxpJQ3v0uuJ5d5usIIa953jahDETyVcUL/yn/Nf16Va nFFI901vmFipdb8od8M61iFvKmDat0Pi73pSilYOdViSA+CUcSmua3pD0a8ukQvmz5 CSzHE2U0xInJQ== 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 5.15-stable tree Date: Sat, 7 Nov 2026 06:10:49 -0500 Message-ID: <20261107061049-failed-5.15-7d4f1cbfe063@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 5.15-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-5.15.y git checkout FETCH_HEAD git cherry-pick -x 7d4f1cbfe063af5581dac66abe9e9c965e1031cc # git commit -s git send-email --to '' --in-reply-to '20261107061049-failed-5.15-7d4f1cbfe063@kernel.org' --subject-prefix 'PATCH 5.15.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