From mboxrd@z Thu Jan 1 00:00:00 1970 Received: from smtp.kernel.org (aws-us-west-2-korg-mail-1.web.codeaurora.org [10.30.226.201]) (using TLSv1.2 with cipher ECDHE-RSA-AES256-GCM-SHA384 (256/256 bits)) (No client certificate requested) by smtp.subspace.kernel.org (Postfix) with ESMTPS id 7EB35101C0 for ; Mon, 15 May 2023 17:54:06 +0000 (UTC) Received: by smtp.kernel.org (Postfix) with ESMTPSA id DBAAAC433D2; Mon, 15 May 2023 17:54:05 +0000 (UTC) DKIM-Signature: v=1; a=rsa-sha256; c=relaxed/simple; d=linuxfoundation.org; s=korg; t=1684173246; bh=PfyDjqO/6tcjDC+GDrPObxuTvMlznqvtvK2/x5DRIuU=; h=From:To:Cc:Subject:Date:In-Reply-To:References:From; b=WqH2E/JdlZkGt11urPmA8XbAdSl2G1WIEYNgozV1XPe39MJfgwCIC5/gp/ehxz0MN monmMP3w2zbYjAljhVnEVZzJ4Ync22ziD/Xz7s66GlzvDmt+RN6lcvsug2r16WqLks bUUjzY4dSf/uLGojBmtLl72TItdpZNeqfjeoBrTQ= From: Greg Kroah-Hartman To: stable@vger.kernel.org Cc: Greg Kroah-Hartman , patches@lists.linux.dev, Lino Sanfilippo , Jarkko Sakkinen , Sasha Levin Subject: [PATCH 5.4 032/282] tpm, tpm_tis: Do not skip reset of original interrupt vector Date: Mon, 15 May 2023 18:26:50 +0200 Message-Id: <20230515161723.238443849@linuxfoundation.org> X-Mailer: git-send-email 2.40.1 In-Reply-To: <20230515161722.146344674@linuxfoundation.org> References: <20230515161722.146344674@linuxfoundation.org> User-Agent: quilt/0.67 Precedence: bulk X-Mailing-List: patches@lists.linux.dev List-Id: List-Subscribe: List-Unsubscribe: MIME-Version: 1.0 Content-Type: text/plain; charset=UTF-8 Content-Transfer-Encoding: 8bit From: Lino Sanfilippo [ Upstream commit ed9be0e6c892a783800d77a41ca4c7255c6af8c5 ] If in tpm_tis_probe_irq_single() an error occurs after the original interrupt vector has been read, restore the interrupts before the error is returned. Since the caller does not check the error value, return -1 in any case that the TPM_CHIP_FLAG_IRQ flag is not set. Since the return value of function tpm_tis_gen_interrupt() is not longer used, make it a void function. Fixes: 1107d065fdf1 ("tpm_tis: Introduce intermediate layer for TPM access") Signed-off-by: Lino Sanfilippo Tested-by: Jarkko Sakkinen Reviewed-by: Jarkko Sakkinen Signed-off-by: Jarkko Sakkinen Signed-off-by: Sasha Levin --- drivers/char/tpm/tpm_tis_core.c | 29 +++++++++++------------------ 1 file changed, 11 insertions(+), 18 deletions(-) diff --git a/drivers/char/tpm/tpm_tis_core.c b/drivers/char/tpm/tpm_tis_core.c index 70f7859942287..cb0660304e480 100644 --- a/drivers/char/tpm/tpm_tis_core.c +++ b/drivers/char/tpm/tpm_tis_core.c @@ -613,7 +613,7 @@ static irqreturn_t tis_int_handler(int dummy, void *dev_id) return IRQ_HANDLED; } -static int tpm_tis_gen_interrupt(struct tpm_chip *chip) +static void tpm_tis_gen_interrupt(struct tpm_chip *chip) { const char *desc = "attempting to generate an interrupt"; u32 cap2; @@ -622,7 +622,7 @@ static int tpm_tis_gen_interrupt(struct tpm_chip *chip) ret = request_locality(chip, 0); if (ret < 0) - return ret; + return; if (chip->flags & TPM_CHIP_FLAG_TPM2) ret = tpm2_get_tpm_pt(chip, 0x100, &cap2, desc); @@ -630,8 +630,6 @@ static int tpm_tis_gen_interrupt(struct tpm_chip *chip) ret = tpm1_getcap(chip, TPM_CAP_PROP_TIS_TIMEOUT, &cap, desc, 0); release_locality(chip, 0); - - return ret; } /* Register the IRQ and issue a command that will cause an interrupt. If an @@ -661,42 +659,37 @@ static int tpm_tis_probe_irq_single(struct tpm_chip *chip, u32 intmask, rc = tpm_tis_write8(priv, TPM_INT_VECTOR(priv->locality), irq); if (rc < 0) - return rc; + goto restore_irqs; rc = tpm_tis_read32(priv, TPM_INT_STATUS(priv->locality), &int_status); if (rc < 0) - return rc; + goto restore_irqs; /* Clear all existing */ rc = tpm_tis_write32(priv, TPM_INT_STATUS(priv->locality), int_status); if (rc < 0) - return rc; - + goto restore_irqs; /* Turn on */ rc = tpm_tis_write32(priv, TPM_INT_ENABLE(priv->locality), intmask | TPM_GLOBAL_INT_ENABLE); if (rc < 0) - return rc; + goto restore_irqs; priv->irq_tested = false; /* Generate an interrupt by having the core call through to * tpm_tis_send */ - rc = tpm_tis_gen_interrupt(chip); - if (rc < 0) - return rc; + tpm_tis_gen_interrupt(chip); +restore_irqs: /* tpm_tis_send will either confirm the interrupt is working or it * will call disable_irq which undoes all of the above. */ if (!(chip->flags & TPM_CHIP_FLAG_IRQ)) { - rc = tpm_tis_write8(priv, original_int_vec, - TPM_INT_VECTOR(priv->locality)); - if (rc < 0) - return rc; - - return 1; + tpm_tis_write8(priv, original_int_vec, + TPM_INT_VECTOR(priv->locality)); + return -1; } return 0; -- 2.39.2