From mboxrd@z Thu Jan 1 00:00:00 1970 Return-Path: Received: (majordomo@vger.kernel.org) by vger.kernel.org via listexpand id S933375AbcLNWLH (ORCPT ); Wed, 14 Dec 2016 17:11:07 -0500 Received: from smtp.codeaurora.org ([198.145.29.96]:57032 "EHLO smtp.codeaurora.org" rhost-flags-OK-OK-OK-OK) by vger.kernel.org with ESMTP id S1751711AbcLNWLG (ORCPT ); Wed, 14 Dec 2016 17:11:06 -0500 DMARC-Filter: OpenDMARC Filter v1.3.1 smtp.codeaurora.org 6D5AA615DD Authentication-Results: pdx-caf-mail.web.codeaurora.org; dmarc=none header.from=codeaurora.org Authentication-Results: pdx-caf-mail.web.codeaurora.org; spf=pass smtp.mailfrom=agustinv@codeaurora.org From: Agustin Vega-Frias To: linux-kernel@vger.kernel.org, linux-acpi@vger.kernel.org, linux-arm-kernel@lists.infradead.org, rjw@rjwysocki.net, lenb@kernel.org, tglx@linutronix.de, jason@lakedaemon.net, marc.zyngier@arm.com Cc: lorenzo.pieralisi@arm.com, timur@codeaurora.org, cov@codeaurora.org, agross@codeaurora.org, harba@codeaurora.org, jcm@redhat.com, msalter@redhat.com, mlangsdo@redhat.com, ahs3@redhat.com, astone@redhat.com, graeme.gregory@linaro.org, guohanjun@huawei.com, charles.garcia-tobin@arm.com, Agustin Vega-Frias Subject: [PATCH V9 1/3] ACPI: Generic GSI: Do not attempt to map non-GSI IRQs during bus scan Date: Wed, 14 Dec 2016 17:10:36 -0500 Message-Id: <1481753438-3905-2-git-send-email-agustinv@codeaurora.org> X-Mailer: git-send-email 1.9.1 In-Reply-To: <1481753438-3905-1-git-send-email-agustinv@codeaurora.org> References: <1481753438-3905-1-git-send-email-agustinv@codeaurora.org> Sender: linux-kernel-owner@vger.kernel.org List-ID: X-Mailing-List: linux-kernel@vger.kernel.org ACPI extended IRQ resources may contain a Resource Source field to specify an alternate interrupt controller, attempting to map them as GSIs is incorrect, so just disable the platform resource. Since this field is currently ignored, we make this change conditional on CONFIG_ACPI_GENERIC_GSI to keep the current behavior on x86 platforms, in case some existing ACPI tables are using this incorrectly. Signed-off-by: Agustin Vega-Frias --- drivers/acpi/resource.c | 17 ++++++++++++++++- 1 file changed, 16 insertions(+), 1 deletion(-) diff --git a/drivers/acpi/resource.c b/drivers/acpi/resource.c index 56241eb..76ca4e9 100644 --- a/drivers/acpi/resource.c +++ b/drivers/acpi/resource.c @@ -43,6 +43,18 @@ static inline bool acpi_iospace_resource_valid(struct resource *res) acpi_iospace_resource_valid(struct resource *res) { return true; } #endif +#ifdef CONFIG_ACPI_GENERIC_GSI +static inline bool is_gsi(struct acpi_resource_extended_irq *ext_irq) +{ + return ext_irq->resource_source.string_length == 0; +} +#else +static inline bool is_gsi(struct acpi_resource_extended_irq *ext_irq) +{ + return true; +} +#endif + static bool acpi_dev_resource_len_valid(u64 start, u64 end, u64 len, bool io) { u64 reslen = end - start + 1; @@ -470,9 +482,12 @@ bool acpi_dev_resource_interrupt(struct acpi_resource *ares, int index, acpi_dev_irqresource_disabled(res, 0); return false; } - acpi_dev_get_irqresource(res, ext_irq->interrupts[index], + if (is_gsi(ext_irq)) + acpi_dev_get_irqresource(res, ext_irq->interrupts[index], ext_irq->triggering, ext_irq->polarity, ext_irq->sharable, false); + else + acpi_dev_irqresource_disabled(res, 0); break; default: res->flags = 0; -- Qualcomm Datacenter Technologies, Inc. on behalf of the Qualcomm Technologies, Inc. Qualcomm Technologies, Inc. is a member of the Code Aurora Forum, a Linux Foundation Collaborative Project.