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 22059171A1 for ; Mon, 8 May 2023 11:33:34 +0000 (UTC) Received: by smtp.kernel.org (Postfix) with ESMTPSA id 8E434C433D2; Mon, 8 May 2023 11:33:33 +0000 (UTC) DKIM-Signature: v=1; a=rsa-sha256; c=relaxed/simple; d=linuxfoundation.org; s=korg; t=1683545614; bh=qHjuvjEqB5fyIMJEWbG0PLepN709uaQNUs+nd+US6ew=; h=From:To:Cc:Subject:Date:In-Reply-To:References:From; b=JIK9zGMH8phUoMnMDN2bqJLvDN0e2V0ecvRkre/ZEMD4DgcyQCYlG00tEXq4u4m0c 3pocGYUqhI8oYibGMI7RuJBIT91LNQtKVT3ovKP4FovQ4ewz06DHyPRuv5TpbDXknW /gPpuV0VKi9sWBZww12WzPmWm2Xb46g8lXEwQ2SM= From: Greg Kroah-Hartman To: stable@vger.kernel.org Cc: Greg Kroah-Hartman , patches@lists.linux.dev, Lino Sanfilippo , =?UTF-8?q?Michael=20Niew=C3=B6hner?= , Jarkko Sakkinen , Sasha Levin Subject: [PATCH 5.15 068/371] tpm, tpm_tis: Claim locality before writing TPM_INT_ENABLE register Date: Mon, 8 May 2023 11:44:29 +0200 Message-Id: <20230508094814.812269507@linuxfoundation.org> X-Mailer: git-send-email 2.40.1 In-Reply-To: <20230508094811.912279944@linuxfoundation.org> References: <20230508094811.912279944@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 282657a8bd7fddcf511b834f43705001668b33a7 ] In disable_interrupts() the TPM_GLOBAL_INT_ENABLE bit is unset in the TPM_INT_ENABLE register to shut the interrupts off. However modifying the register is only possible with a held locality. So claim the locality before disable_interrupts() is called. Signed-off-by: Lino Sanfilippo Tested-by: Michael Niewöhner Tested-by: Jarkko Sakkinen Reviewed-by: Jarkko Sakkinen Signed-off-by: Jarkko Sakkinen Stable-dep-of: 955df4f87760 ("tpm, tpm_tis: Claim locality when interrupts are reenabled on resume") Signed-off-by: Sasha Levin --- drivers/char/tpm/tpm_tis_core.c | 4 ++++ 1 file changed, 4 insertions(+) diff --git a/drivers/char/tpm/tpm_tis_core.c b/drivers/char/tpm/tpm_tis_core.c index ae0c773a6041a..274096fece3fa 100644 --- a/drivers/char/tpm/tpm_tis_core.c +++ b/drivers/char/tpm/tpm_tis_core.c @@ -1076,7 +1076,11 @@ int tpm_tis_core_init(struct device *dev, struct tpm_tis_data *priv, int irq, dev_err(&chip->dev, FW_BUG "TPM interrupt not working, polling instead\n"); + rc = request_locality(chip, 0); + if (rc < 0) + goto out_err; disable_interrupts(chip); + release_locality(chip, 0); } } else { tpm_tis_probe_irq(chip, intmask); -- 2.39.2