linux-kernel - [PATCH v2] mmc: core: Delete an error message for a failed memory allocation in four functions

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Date:   Fri, 19 May 2017 13:34:44 +0200
From:   SF Markus Elfring <elfring@...rs.sourceforge.net>
To:     Ulf Hansson <ulf.hansson@...aro.org>
Cc:     "linux-mmc@...r.kernel.org" <linux-mmc@...r.kernel.org>,
        Bojan Prtvar <prtvar.b@...il.com>,
        Linus Walleij <linus.walleij@...aro.org>,
        Paul Burton <paul.burton@...tec.com>,
        Shawn Lin <shawn.lin@...k-chips.com>,
        Tomas Winkler <tomas.winkler@...el.com>,
        Uri Yanai <uri.yanai@...disk.com>,
        Wolfram Sang <wsa@...-dreams.de>,
        LKML <linux-kernel@...r.kernel.org>,
        kernel-janitors@...r.kernel.org
Subject: [PATCH v2] mmc: core: Delete an error message for a failed memory
 allocation in four functions

From: Markus Elfring <elfring@...rs.sourceforge.net>
Date: Fri, 19 May 2017 13:15:27 +0200

Omit an extra message for a memory allocation failure in these functions.

This issue was detected by using the Coccinelle software.

Link: http://events.linuxfoundation.org/sites/events/files/slides/LCJ16-Refactor_Strings-WSang_0.pdf
Signed-off-by: Markus Elfring <elfring@...rs.sourceforge.net>
---

v2:
This refactoring superseded the update suggestion "mmc: core: Delete
an error message for a failed memory allocation in three functions"
from 2017-05-13 because another adjustment was requested by Ulf Hansson.
https://patchwork.kernel.org/patch/9725233/
https://lkml.org/lkml/2017/5/19/308

 drivers/mmc/core/mmc_test.c |  2 --
 drivers/mmc/core/sd.c       | 16 +++-------------
 2 files changed, 3 insertions(+), 15 deletions(-)

diff --git a/drivers/mmc/core/mmc_test.c b/drivers/mmc/core/mmc_test.c
index fd1b4b8510b9..7a304a6e5bf1 100644
--- a/drivers/mmc/core/mmc_test.c
+++ b/drivers/mmc/core/mmc_test.c
@@ -3220,8 +3220,6 @@ static int __mmc_test_register_dbgfs_file(struct mmc_card *card,
 	df = kmalloc(sizeof(*df), GFP_KERNEL);
 	if (!df) {
 		debugfs_remove(file);
-		dev_err(&card->dev,
-			"Can't allocate memory for internal usage.\n");
 		return -ENOMEM;
 	}
 
diff --git a/drivers/mmc/core/sd.c b/drivers/mmc/core/sd.c
index d109634fbfce..1d7542daecbe 100644
--- a/drivers/mmc/core/sd.c
+++ b/drivers/mmc/core/sd.c
@@ -294,12 +294,8 @@ static int mmc_read_switch(struct mmc_card *card)
 	err = -EIO;
 
 	status = kmalloc(64, GFP_KERNEL);
-	if (!status) {
-		pr_err("%s: could not allocate a buffer for "
-			"switch capabilities.\n",
-			mmc_hostname(card->host));
+	if (!status)
 		return -ENOMEM;
-	}
 
 	/*
 	 * Find out the card's support bits with a mode 0 operation.
@@ -359,11 +355,8 @@ int mmc_sd_switch_hs(struct mmc_card *card)
 		return 0;
 
 	status = kmalloc(64, GFP_KERNEL);
-	if (!status) {
-		pr_err("%s: could not allocate a buffer for "
-			"switch capabilities.\n", mmc_hostname(card->host));
+	if (!status)
 		return -ENOMEM;
-	}
 
 	err = mmc_sd_switch(card, 1, 0, 1, status);
 	if (err)
@@ -596,11 +589,8 @@ static int mmc_sd_init_uhs_card(struct mmc_card *card)
 		return 0;
 
 	status = kmalloc(64, GFP_KERNEL);
-	if (!status) {
-		pr_err("%s: could not allocate a buffer for "
-			"switch capabilities.\n", mmc_hostname(card->host));
+	if (!status)
 		return -ENOMEM;
-	}
 
 	/* Set 4-bit bus width */
 	if ((card->host->caps & MMC_CAP_4_BIT_DATA) &&
-- 
2.13.0