[PATCH] mmc: core: Delete an error message for a failed memory allocation in three functions

[PATCH] mmc: core: Delete an error message for a failed memory allocation in three functions

[SF Markus Elfring]

From: Markus Elfring <elfring@users.sourceforge.net>
Date: Sat, 13 May 2017 14:40:08 +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@users.sourceforge.net>
---
 drivers/mmc/core/sd.c | 16 +++-------------
 1 file changed, 3 insertions(+), 13 deletions(-)

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) &&
-- 
2.12.3

RE: [PATCH] mmc: core: Delete an error message for a failed memory allocation in three functions

[Winkler, Tomas]
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Re: [PATCH] mmc: core: Delete an error message for a failed memory allocation in three functions

[Ulf Hansson]

On 13 May 2017 at 14:54, SF Markus Elfring
<elfring@users.sourceforge.net> wrote:
> From: Markus Elfring <elfring@users.sourceforge.net>
> Date: Sat, 13 May 2017 14:40:08 +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@users.sourceforge.net>

It's a nice cleanup. However I found one more occasion in mmc_test.c,
please fix that and re-spin.

Kind regards
Uffe

> ---
>  drivers/mmc/core/sd.c | 16 +++-------------
>  1 file changed, 3 insertions(+), 13 deletions(-)
>
> 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) &&
> --
> 2.12.3
>
> --
> To unsubscribe from this list: send the line "unsubscribe linux-mmc" in
> the body of a message to majordomo@vger.kernel.org
> More majordomo info at  http://vger.kernel.org/majordomo-info.html

Re: mmc: core: Delete an error message for a failed memory allocation in three functions

[SF Markus Elfring]

> It's a nice cleanup. However I found one more occasion in mmc_test.c,
> please fix that and re-spin.

To which source code place does this feedback refer?

Does it mean that another message removal would make sense in the
function “__mmc_test_register_dbgfs_file”?
https://git.kernel.org/pub/scm/linux/kernel/git/torvalds/linux.git/tree/drivers/mmc/core/mmc_test.c?h=v4.11#n3202

Regards,
Markus

Re: mmc: core: Delete an error message for a failed memory allocation in three functions

[Ulf Hansson]

On 19 May 2017 at 11:39, SF Markus Elfring
<elfring@users.sourceforge.net> wrote:
>> It's a nice cleanup. However I found one more occasion in mmc_test.c,
>> please fix that and re-spin.
>
> To which source code place does this feedback refer?
>
> Does it mean that another message removal would make sense in the
> function “__mmc_test_register_dbgfs_file”?
> https://git.kernel.org/pub/scm/linux/kernel/git/torvalds/linux.git/tree/drivers/mmc/core/mmc_test.c?h=v4.11#n3202

Yes!

Br
Uffe

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

[SF Markus Elfring]

From: Markus Elfring <elfring@users.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@users.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

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

[Ulf Hansson]

On 19 May 2017 at 13:34, SF Markus Elfring
<elfring@users.sourceforge.net> wrote:
> From: Markus Elfring <elfring@users.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@users.sourceforge.net>

Thanks, applied for next!

Kind regards
Uffe

> ---
>
> 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
>
> --
> To unsubscribe from this list: send the line "unsubscribe linux-mmc" in
> the body of a message to majordomo@vger.kernel.org
> More majordomo info at  http://vger.kernel.org/majordomo-info.html