linux-kernel - [PATCH 3/7] firmware: imx: scu-pd: do not power off console if no_console

lists.openwall.net		lists / announce owl-users owl-dev john-users john-dev passwdqc-users yescrypt popa3d-users / oss-security kernel-hardening musl sabotage tlsify passwords / crypt-dev xvendor / Bugtraq Full-Disclosure linux-kernel linux-netdev linux-ext4 linux-hardening linux-cve-announce PHC
Open Source and information security mailing list archives

Hash Suite: Windows password security audit tool. GUI, reports in PDF.

[<prev] [next>] [<thread-prev] [thread-next>] [day] [month] [year] [list]

Message-Id: <20230714090936.937344-4-peng.fan@oss.nxp.com>
Date:   Fri, 14 Jul 2023 17:09:32 +0800
From:   "Peng Fan (OSS)" <peng.fan@....nxp.com>
To:     shawnguo@...nel.org, s.hauer@...gutronix.de
Cc:     kernel@...gutronix.de, festevam@...il.com, linux-imx@....com,
        Frank.Li@....com, aisheng.dong@....com,
        marcel.ziswiler@...adex.com, linux-arm-kernel@...ts.infradead.org,
        linux-kernel@...r.kernel.org, Peng Fan <peng.fan@....com>
Subject: [PATCH 3/7] firmware: imx: scu-pd: do not power off console if no_console_suspend

From: Dong Aisheng <aisheng.dong@....com>

Do not power off console if no_console_suspend

Signed-off-by: Dong Aisheng <aisheng.dong@....com>
Signed-off-by: Peng Fan <peng.fan@....com>
---
 drivers/firmware/imx/scu-pd.c | 5 +++++
 1 file changed, 5 insertions(+)

diff --git a/drivers/firmware/imx/scu-pd.c b/drivers/firmware/imx/scu-pd.c
index 08583a10ac62..6770be51d234 100644
--- a/drivers/firmware/imx/scu-pd.c
+++ b/drivers/firmware/imx/scu-pd.c
@@ -52,6 +52,7 @@
  */
 
 #include <dt-bindings/firmware/imx/rsrc.h>
+#include <linux/console.h>
 #include <linux/firmware/imx/sci.h>
 #include <linux/firmware/imx/svc/rm.h>
 #include <linux/io.h>
@@ -324,6 +325,10 @@ static int imx_sc_pd_power(struct generic_pm_domain *domain, bool power_on)
 	msg.resource = pd->rsrc;
 	msg.mode = power_on ? IMX_SC_PM_PW_MODE_ON : IMX_SC_PM_PW_MODE_LP;
 
+	/* keep uart console power on for no_console_suspend */
+	if (imx_con_rsrc == pd->rsrc && !console_suspend_enabled && !power_on)
+		return 0;
+
 	ret = imx_scu_call_rpc(pm_ipc_handle, &msg, true);
 	if (ret)
 		dev_err(&domain->dev, "failed to power %s resource %d ret %d\n",
-- 
2.37.1