linux-kernel - [PATCH 2/3] genirq/msi: cache the last msi msg

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Message-Id: <20240324-smmu-v3-v1-2-11bc96e156a5@nxp.com>
Date: Sun, 24 Mar 2024 20:28:59 +0800
From: "Peng Fan (OSS)" <peng.fan@....nxp.com>
To: Will Deacon <will@...nel.org>, Robin Murphy <robin.murphy@....com>, 
 Joerg Roedel <joro@...tes.org>, Thomas Gleixner <tglx@...utronix.de>, 
 Marc Zyngier <maz@...nel.org>
Cc: Bixuan Cui <cuibixuan@...wei.com>, linux-arm-kernel@...ts.infradead.org, 
 iommu@...ts.linux.dev, linux-kernel@...r.kernel.org, 
 Peng Fan <peng.fan@....com>
Subject: [PATCH 2/3] genirq/msi: cache the last msi msg

From: Peng Fan <peng.fan@....com>

Cache the last msi msg which will be used for ARM SMMU V3 resume

Signed-off-by: Peng Fan <peng.fan@....com>
---
 kernel/irq/msi.c | 3 +++
 1 file changed, 3 insertions(+)

diff --git a/kernel/irq/msi.c b/kernel/irq/msi.c
index f90952ebc494..9d7e0a675089 100644
--- a/kernel/irq/msi.c
+++ b/kernel/irq/msi.c
@@ -617,6 +617,9 @@ static unsigned int msi_domain_get_hwsize(struct device *dev, unsigned int domid
 static inline void irq_chip_write_msi_msg(struct irq_data *data,
 					  struct msi_msg *msg)
 {
+	struct msi_desc *desc = irq_data_get_msi_desc(data);
+
+	desc->msg = *msg;
 	data->chip->irq_write_msi_msg(data, msg);
 }
 

-- 
2.37.1