linux-kernel - [PATCH AUTOSEL 5.15 081/153] firmware: arm_ffa: Set dma

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Message-Id: <20250505231320.2695319-81-sashal@kernel.org>
Date: Mon,  5 May 2025 19:12:08 -0400
From: Sasha Levin <sashal@...nel.org>
To: linux-kernel@...r.kernel.org,
	stable@...r.kernel.org
Cc: Viresh Kumar <viresh.kumar@...aro.org>,
	Sudeep Holla <sudeep.holla@....com>,
	Sasha Levin <sashal@...nel.org>,
	linux-arm-kernel@...ts.infradead.org
Subject: [PATCH AUTOSEL 5.15 081/153] firmware: arm_ffa: Set dma_mask for ffa devices

From: Viresh Kumar <viresh.kumar@...aro.org>

[ Upstream commit cc0aac7ca17e0ea3ca84b552fc79f3e86fd07f53 ]

Set dma_mask for FFA devices, otherwise DMA allocation using the device pointer
lead to following warning:

WARNING: CPU: 1 PID: 1 at kernel/dma/mapping.c:597 dma_alloc_attrs+0xe0/0x124

Signed-off-by: Viresh Kumar <viresh.kumar@...aro.org>
Message-Id: <e3dd8042ac680bd74b6580c25df855d092079c18.1737107520.git.viresh.kumar@...aro.org>
Signed-off-by: Sudeep Holla <sudeep.holla@....com>
Signed-off-by: Sasha Levin <sashal@...nel.org>
---
 drivers/firmware/arm_ffa/bus.c | 1 +
 1 file changed, 1 insertion(+)

diff --git a/drivers/firmware/arm_ffa/bus.c b/drivers/firmware/arm_ffa/bus.c
index f79ba6f733ba4..27820a59ce25e 100644
--- a/drivers/firmware/arm_ffa/bus.c
+++ b/drivers/firmware/arm_ffa/bus.c
@@ -190,6 +190,7 @@ struct ffa_device *ffa_device_register(const uuid_t *uuid, int vm_id)
 	dev = &ffa_dev->dev;
 	dev->bus = &ffa_bus_type;
 	dev->release = ffa_release_device;
+	dev->dma_mask = &dev->coherent_dma_mask;
 	dev_set_name(&ffa_dev->dev, "arm-ffa-%d", id);
 
 	ffa_dev->id = id;
-- 
2.39.5