linux-kernel - [PATCH v2 11/13] iio: light: st_uvis25_i2c: Use vsprintf extension %pe for symbolic error name

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Message-Id: <b48e846ee7f1fff6f05cd78cd7648f8b4228520d.1584897364.git.nish.malpani25@gmail.com>
Date:   Sun, 22 Mar 2020 22:53:13 +0530
From:   Nishant Malpani <nish.malpani25@...il.com>
To:     jic23@...nel.org
Cc:     andriy.shevchenko@...ux.intel.com, joe@...ches.com,
        knaack.h@....de, lars@...afoo.de, pmeerw@...erw.net,
        nish.malpani25@...il.com, linux-iio@...r.kernel.org,
        linux-kernel@...r.kernel.org
Subject: [PATCH v2 11/13] iio: light: st_uvis25_i2c: Use vsprintf extension %pe for symbolic error name

Utilize %pe format specifier from vsprintf while printing error logs
with dev_err(). Discards the use of unnecessary explicit casting and
prints symbolic error name which might prove to be convenient during
debugging.

Signed-off-by: Nishant Malpani <nish.malpani25@...il.com>
---

Changes in v2:
  - Rewrite commit subject line outlining the usage of %pe.
  - Add a separator between regmap and its error name.

Based on conversations in [1] & [2].

[1] https://marc.info/?l=linux-iio&m=158427554607223&w=2
[2] https://marc.info/?l=linux-iio&m=158481647605891&w=2
---
 drivers/iio/light/st_uvis25_i2c.c | 4 ++--
 1 file changed, 2 insertions(+), 2 deletions(-)

diff --git a/drivers/iio/light/st_uvis25_i2c.c b/drivers/iio/light/st_uvis25_i2c.c
index 4889bbeb0c73..801f754bc1a5 100644
--- a/drivers/iio/light/st_uvis25_i2c.c
+++ b/drivers/iio/light/st_uvis25_i2c.c
@@ -31,8 +31,8 @@ static int st_uvis25_i2c_probe(struct i2c_client *client,
 
 	regmap = devm_regmap_init_i2c(client, &st_uvis25_i2c_regmap_config);
 	if (IS_ERR(regmap)) {
-		dev_err(&client->dev, "Failed to register i2c regmap %d\n",
-			(int)PTR_ERR(regmap));
+		dev_err(&client->dev, "Failed to register i2c regmap: %pe\n",
+			regmap);
 		return PTR_ERR(regmap);
 	}
 
-- 
2.20.1