linux-kernel - [PATCH 5.13 191/351] ACPI: AMBA: Fix resource name in /proc/iomem

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Message-Id: <20210719144951.290427919@linuxfoundation.org>
Date:   Mon, 19 Jul 2021 16:52:17 +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,
        Liguang Zhang <zhangliguang@...ux.alibaba.com>,
        "Rafael J. Wysocki" <rafael.j.wysocki@...el.com>,
        Sasha Levin <sashal@...nel.org>
Subject: [PATCH 5.13 191/351] ACPI: AMBA: Fix resource name in /proc/iomem

From: Liguang Zhang <zhangliguang@...ux.alibaba.com>

[ Upstream commit 7718629432676b5ebd9a32940782fe297a0abf8d ]

In function amba_handler_attach(), dev->res.name is initialized by
amba_device_alloc. But when address_found is false, dev->res.name is
assigned to null value, which leads to wrong resource name display in
/proc/iomem, "<BAD>" is seen for those resources.

Signed-off-by: Liguang Zhang <zhangliguang@...ux.alibaba.com>
Signed-off-by: Rafael J. Wysocki <rafael.j.wysocki@...el.com>
Signed-off-by: Sasha Levin <sashal@...nel.org>
---
 drivers/acpi/acpi_amba.c | 1 +
 1 file changed, 1 insertion(+)

diff --git a/drivers/acpi/acpi_amba.c b/drivers/acpi/acpi_amba.c
index 49b781a9cd97..ab8a4e0191b1 100644
--- a/drivers/acpi/acpi_amba.c
+++ b/drivers/acpi/acpi_amba.c
@@ -76,6 +76,7 @@ static int amba_handler_attach(struct acpi_device *adev,
 		case IORESOURCE_MEM:
 			if (!address_found) {
 				dev->res = *rentry->res;
+				dev->res.name = dev_name(&dev->dev);
 				address_found = true;
 			}
 			break;
-- 
2.30.2