linux-kernel - [PATCH 5.11 141/601] bus: ti-sysc: Fix initializing module

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Date:   Wed, 12 May 2021 16:43:38 +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, Tony Lindgren <tony@...mide.com>,
        Sasha Levin <sashal@...nel.org>
Subject: [PATCH 5.11 141/601] bus: ti-sysc: Fix initializing module_pa for modules without sysc register

From: Tony Lindgren <tony@...mide.com>

[ Upstream commit 7bad5af826aba00487fed9a3300d3f43f0cba11b ]

We have interconnect target modules with no known registers using only
clocks and resets, but we still want to detect them based on the module
IO range. So let's call sysc_parse_and_check_child_range() earlier so we
have module_pa properly initialized.

Fixes: 2928135c93f8 ("bus: ti-sysc: Support modules without control registers")
Signed-off-by: Tony Lindgren <tony@...mide.com>
Signed-off-by: Sasha Levin <sashal@...nel.org>
---
 drivers/bus/ti-sysc.c | 6 +++---
 1 file changed, 3 insertions(+), 3 deletions(-)

diff --git a/drivers/bus/ti-sysc.c b/drivers/bus/ti-sysc.c
index 9e535336689f..68145e326eb9 100644
--- a/drivers/bus/ti-sysc.c
+++ b/drivers/bus/ti-sysc.c
@@ -901,9 +901,6 @@ static int sysc_map_and_check_registers(struct sysc *ddata)
 	struct device_node *np = ddata->dev->of_node;
 	int error;
 
-	if (!of_get_property(np, "reg", NULL))
-		return 0;
-
 	error = sysc_parse_and_check_child_range(ddata);
 	if (error)
 		return error;
@@ -914,6 +911,9 @@ static int sysc_map_and_check_registers(struct sysc *ddata)
 
 	sysc_check_children(ddata);
 
+	if (!of_get_property(np, "reg", NULL))
+		return 0;
+
 	error = sysc_parse_registers(ddata);
 	if (error)
 		return error;
-- 
2.30.2