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 CBDD3C8E5 for ; Mon, 26 Jun 2023 18:38:15 +0000 (UTC) Received: by smtp.kernel.org (Postfix) with ESMTPSA id 54828C433C8; Mon, 26 Jun 2023 18:38:15 +0000 (UTC) DKIM-Signature: v=1; a=rsa-sha256; c=relaxed/simple; d=linuxfoundation.org; s=korg; t=1687804695; bh=og1l9JlDqTQW0p+OEuy/ep1t09lZJYsiXejiLmrD8nY=; h=From:To:Cc:Subject:Date:In-Reply-To:References:From; b=tj4EsA8JaRefRO6r4qZbpNxkv+iEm5wZVcTbN6DoEG/W3uRiMs/HnPAisDXA63ftV YO0O8CleVCIq29lvbjsqwIoToZNnW7ZPq9RqtGKfkRz0nWv1GhqtYMKKi2WQAsC7zQ stZ6RmFMQNxjkp6R4LHUK2PApwjAOHlyP403ETyQ= 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 Subject: [PATCH 5.15 03/96] tpm, tpm_tis: Claim locality in interrupt handler Date: Mon, 26 Jun 2023 20:11:18 +0200 Message-ID: <20230626180747.075831680@linuxfoundation.org> X-Mailer: git-send-email 2.41.0 In-Reply-To: <20230626180746.943455203@linuxfoundation.org> References: <20230626180746.943455203@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 commit 0e069265bce5a40c4eee52e2364bbbd4dabee94a upstream. Writing the TPM_INT_STATUS register in the interrupt handler to clear the interrupts only has effect if a locality is held. Since this is not guaranteed at the time the interrupt is fired, claim the locality explicitly in the handler. Signed-off-by: Lino Sanfilippo Tested-by: Michael Niewöhner Tested-by: Jarkko Sakkinen Reviewed-by: Jarkko Sakkinen Signed-off-by: Jarkko Sakkinen Signed-off-by: Greg Kroah-Hartman --- drivers/char/tpm/tpm_tis_core.c | 2 ++ 1 file changed, 2 insertions(+) --- a/drivers/char/tpm/tpm_tis_core.c +++ b/drivers/char/tpm/tpm_tis_core.c @@ -731,7 +731,9 @@ static irqreturn_t tis_int_handler(int d wake_up_interruptible(&priv->int_queue); /* Clear interrupts handled with TPM_EOI */ + tpm_tis_request_locality(chip, 0); rc = tpm_tis_write32(priv, TPM_INT_STATUS(priv->locality), interrupt); + tpm_tis_relinquish_locality(chip, 0); if (rc < 0) return IRQ_NONE;