linux-kernel - [PATCH v2 14/22] pwm: Probe PWM chip devices on demand

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: <1438089593-7696-15-git-send-email-tomeu.vizoso@collabora.com>
Date:	Tue, 28 Jul 2015 15:19:45 +0200
From:	Tomeu Vizoso <tomeu.vizoso@...labora.com>
To:	linux-kernel@...r.kernel.org
Cc:	Stephen Warren <swarren@...dotorg.org>,
	Javier Martinez Canillas <javier@....samsung.com>,
	Mark Brown <broonie@...nel.org>,
	Thierry Reding <thierry.reding@...il.com>,
	"Rafael J. Wysocki" <rjw@...ysocki.net>,
	linux-arm-kernel@...ts.infradead.org,
	Dmitry Torokhov <dmitry.torokhov@...il.com>,
	devicetree@...r.kernel.org,
	Linus Walleij <linus.walleij@...aro.org>,
	linux-acpi@...r.kernel.org, Arnd Bergmann <arnd@...db.de>,
	Tomeu Vizoso <tomeu.vizoso@...labora.com>,
	linux-pwm@...r.kernel.org
Subject: [PATCH v2 14/22] pwm: Probe PWM chip devices on demand

When looking up a PWM chip through its firmware node, probe it if it
hasn't already.

The goal is to reduce deferred probes to a minimum, as it makes it very
cumbersome to find out why a device failed to probe, and can introduce
very big delays in when a critical device is probed.

Signed-off-by: Tomeu Vizoso <tomeu.vizoso@...labora.com>
---

Changes in v2: None

 drivers/pwm/core.c | 2 ++
 1 file changed, 2 insertions(+)

diff --git a/drivers/pwm/core.c b/drivers/pwm/core.c
index 3a7769fe53de..4727cbf69d96 100644
--- a/drivers/pwm/core.c
+++ b/drivers/pwm/core.c
@@ -496,6 +496,8 @@ static struct pwm_chip *of_node_to_pwmchip(struct device_node *np)
 {
 	struct pwm_chip *chip;
 
+	fwnode_ensure_device(&np->fwnode);
+
 	mutex_lock(&pwm_lock);
 
 	list_for_each_entry(chip, &pwm_chips, list)
-- 
2.4.3

--
To unsubscribe from this list: send the line "unsubscribe linux-kernel" in
the body of a message to majordomo@...r.kernel.org
More majordomo info at  http://vger.kernel.org/majordomo-info.html
Please read the FAQ at  http://www.tux.org/lkml/