linux-kernel - [PATCH] spi: Gracefully handle power supplies with disabled PM

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-next>] [day] [month] [year] [list]

Message-Id: <20180917121041.21084-1-lkundrak@v3.sk>
Date:   Mon, 17 Sep 2018 14:10:41 +0200
From:   Lubomir Rintel <lkundrak@...sk>
To:     linux-kernel@...r.kernel.org
Cc:     linux-spi@...r.kernel.org, Lubomir Rintel <lkundrak@...sk>,
        Mark Brown <broonie@...nel.org>
Subject: [PATCH] spi: Gracefully handle power supplies with disabled PM

This allows use of SPI when power management is disables, such as on
early boot;

See also: commit 31eb74318054 ("PM / runtime: Fix handling of suppliers
with disabled runtime PM")

Cc: Mark Brown <broonie@...nel.org>
Signed-off-by: Lubomir Rintel <lkundrak@...sk>
---
 drivers/spi/spi.c | 2 +-
 1 file changed, 1 insertion(+), 1 deletion(-)

diff --git a/drivers/spi/spi.c b/drivers/spi/spi.c
index ec395a6baf9c..6546564e41d0 100644
--- a/drivers/spi/spi.c
+++ b/drivers/spi/spi.c
@@ -1212,7 +1212,7 @@ static void __spi_pump_messages(struct spi_controller *ctlr, bool in_kthread)
 
 	if (!was_busy && ctlr->auto_runtime_pm) {
 		ret = pm_runtime_get_sync(ctlr->dev.parent);
-		if (ret < 0) {
+		if (ret < 0 && ret != -EACCES) {
 			pm_runtime_put_noidle(ctlr->dev.parent);
 			dev_err(&ctlr->dev, "Failed to power device: %d\n",
 				ret);
-- 
2.17.1