linux-kernel - [PATCH 4.14 039/246] irqchip/ls-scfg-msi: Map MSIs in the iommu

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Date:   Wed,  1 Aug 2018 18:49:09 +0200
From:   Greg Kroah-Hartman <gregkh@...uxfoundation.org>
To:     linux-kernel@...r.kernel.org
Cc:     Greg Kroah-Hartman <gregkh@...uxfoundation.org>,
        stable@...r.kernel.org, Laurentiu Tudor <laurentiu.tudor@....com>,
        Thomas Gleixner <tglx@...utronix.de>, jason@...edaemon.net,
        marc.zyngier@....com, zhiqiang.hou@....com, minghuan.lian@....com,
        Sasha Levin <alexander.levin@...rosoft.com>
Subject: [PATCH 4.14 039/246] irqchip/ls-scfg-msi: Map MSIs in the iommu

4.14-stable review patch.  If anyone has any objections, please let me know.

------------------

From: Laurentiu Tudor <laurentiu.tudor@....com>

[ Upstream commit 0cdd431c337e99177e68597f3de34bedd3a20a74 ]

Add the required iommu_dma_map_msi_msg() when composing the MSI message,
otherwise the interrupts will not work.

Signed-off-by: Laurentiu Tudor <laurentiu.tudor@....com>
Signed-off-by: Thomas Gleixner <tglx@...utronix.de>
Cc: jason@...edaemon.net
Cc: marc.zyngier@....com
Cc: zhiqiang.hou@....com
Cc: minghuan.lian@....com
Link: https://lkml.kernel.org/r/20180605122727.12831-1-laurentiu.tudor@nxp.com
Signed-off-by: Sasha Levin <alexander.levin@...rosoft.com>
Signed-off-by: Greg Kroah-Hartman <gregkh@...uxfoundation.org>
---
 drivers/irqchip/irq-ls-scfg-msi.c |    3 +++
 1 file changed, 3 insertions(+)

--- a/drivers/irqchip/irq-ls-scfg-msi.c
+++ b/drivers/irqchip/irq-ls-scfg-msi.c
@@ -21,6 +21,7 @@
 #include <linux/of_pci.h>
 #include <linux/of_platform.h>
 #include <linux/spinlock.h>
+#include <linux/dma-iommu.h>
 
 #define MSI_IRQS_PER_MSIR	32
 #define MSI_MSIR_OFFSET		4
@@ -94,6 +95,8 @@ static void ls_scfg_msi_compose_msg(stru
 
 	if (msi_affinity_flag)
 		msg->data |= cpumask_first(data->common->affinity);
+
+	iommu_dma_map_msi_msg(data->irq, msg);
 }
 
 static int ls_scfg_msi_set_affinity(struct irq_data *irq_data,