linux-kernel - [PATCH v4 3/3] driver core: add probe_err

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Message-id: <20181220102247.4911-4-a.hajda@samsung.com>
Date:   Thu, 20 Dec 2018 11:22:47 +0100
From:   Andrzej Hajda <a.hajda@...sung.com>
To:     Greg Kroah-Hartman <gregkh@...uxfoundation.org>
Cc:     Andrzej Hajda <a.hajda@...sung.com>,
        Bartlomiej Zolnierkiewicz <b.zolnierkie@...sung.com>,
        Marek Szyprowski <m.szyprowski@...sung.com>,
        "Rafael J. Wysocki" <rafael@...nel.org>,
        linux-kernel@...r.kernel.org,
        Javier Martinez Canillas <javierm@...hat.com>,
        linux-arm-kernel@...ts.infradead.org, andy.shevchenko@...il.com,
        Mark Brown <broonie@...nel.org>,
        Russell King - ARM Linux <linux@...linux.org.uk>
Subject: [PATCH v4 3/3] driver core: add probe_err_ptr helper

probe_err is useful in multiple contexts where error is encoded in pointer.
Adding helper performing conversion to error value should simplify code
further.

Signed-off-by: Andrzej Hajda <a.hajda@...sung.com>
---
 include/linux/device.h | 2 ++
 1 file changed, 2 insertions(+)

diff --git a/include/linux/device.h b/include/linux/device.h
index 2d3a1cc6f5da..50632414c363 100644
--- a/include/linux/device.h
+++ b/include/linux/device.h
@@ -1594,6 +1594,8 @@ do {									\
 extern __printf(3, 4)
 int probe_err(const struct device *dev, int err, const char *fmt, ...);
 
+#define probe_err_ptr(dev, ptr, args...) probe_err(dev, PTR_ERR(ptr), args)
+
 /* Create alias, so I can be autoloaded. */
 #define MODULE_ALIAS_CHARDEV(major,minor) \
 	MODULE_ALIAS("char-major-" __stringify(major) "-" __stringify(minor))
-- 
2.17.1