linux-kernel - [PATCH 2/2] driver core: Print device in really

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Date:   Wed, 20 Nov 2019 15:36:19 +0100
From:   Geert Uytterhoeven <geert+renesas@...der.be>
To:     Greg Kroah-Hartman <gregkh@...uxfoundation.org>,
        "Rafael J . Wysocki" <rafael@...nel.org>
Cc:     linux-kernel@...r.kernel.org,
        Geert Uytterhoeven <geert+renesas@...der.be>
Subject: [PATCH 2/2] driver core: Print device in really_probe() warning backtrace

If a device already has devres items attached before probing, a warning
backtrace is printed.  However, this backtrace does not reveal the
offending device, leaving the user uninformed.

Use dev_WARN_ON() instead of WARN_ON() to fix this.

Signed-off-by: Geert Uytterhoeven <geert+renesas@...der.be>
---
 drivers/base/dd.c | 2 +-
 1 file changed, 1 insertion(+), 1 deletion(-)

diff --git a/drivers/base/dd.c b/drivers/base/dd.c
index d811e60610d33ae9..a7e8040ef0003f44 100644
--- a/drivers/base/dd.c
+++ b/drivers/base/dd.c
@@ -516,7 +516,7 @@ static int really_probe(struct device *dev, struct device_driver *drv)
 	atomic_inc(&probe_count);
 	pr_debug("bus: '%s': %s: probing driver %s with device %s\n",
 		 drv->bus->name, __func__, drv->name, dev_name(dev));
-	WARN_ON(!list_empty(&dev->devres_head));
+	dev_WARN_ON(dev, !list_empty(&dev->devres_head));
 
 re_probe:
 	dev->driver = drv;
-- 
2.17.1