[PATCH 0/2] mtd: spi-nor: use scope-based mutex cleanup helpers

[PATCH 0/2] mtd: spi-nor: use scope-based mutex cleanup helpers

[Tudor Ambarus]

Use scope-based mutex clenup helpers, it reduces the code size.

Signed-off-by: Tudor Ambarus <tudor.ambarus@linaro.org>
---
Tudor Ambarus (2):
      mtd: spi-nor: sort headers alphabetically
      mtd: spi-nor: use scope-based mutex cleanup helpers

 drivers/mtd/spi-nor/core.c | 75 +++++++++++++++-------------------------------
 1 file changed, 24 insertions(+), 51 deletions(-)
---
base-commit: a64dcfb451e254085a7daee5fe51bf22959d52d3
change-id: 20250211-spi-nor-guard-mutex-0899888a4586

Best regards,
-- 
Tudor Ambarus <tudor.ambarus@linaro.org>


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[PATCH 1/2] mtd: spi-nor: sort headers alphabetically

[Tudor Ambarus]

Sorting headers alphabetically helps locating duplicates,
and makes it easier to figure out where to insert new headers.

Signed-off-by: Tudor Ambarus <tudor.ambarus@linaro.org>
---
 drivers/mtd/spi-nor/core.c | 4 ++--
 1 file changed, 2 insertions(+), 2 deletions(-)

diff --git a/drivers/mtd/spi-nor/core.c b/drivers/mtd/spi-nor/core.c
index 19eb98bd6821..1bb4a500be6e 100644
--- a/drivers/mtd/spi-nor/core.c
+++ b/drivers/mtd/spi-nor/core.c
@@ -7,10 +7,10 @@
  * Copyright (C) 2014, Freescale Semiconductor, Inc.
  */
 
-#include <linux/err.h>
-#include <linux/errno.h>
 #include <linux/delay.h>
 #include <linux/device.h>
+#include <linux/err.h>
+#include <linux/errno.h>
 #include <linux/math64.h>
 #include <linux/module.h>
 #include <linux/mtd/mtd.h>

-- 
2.48.1.502.g6dc24dfdaf-goog


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[PATCH 2/2] mtd: spi-nor: use scope-based mutex cleanup helpers

[Tudor Ambarus]

Use scope-based mutex clenup helpers, it reduces the code size.

Signed-off-by: Tudor Ambarus <tudor.ambarus@linaro.org>
---
 drivers/mtd/spi-nor/core.c | 71 ++++++++++++++--------------------------------
 1 file changed, 22 insertions(+), 49 deletions(-)

diff --git a/drivers/mtd/spi-nor/core.c b/drivers/mtd/spi-nor/core.c
index 1bb4a500be6e..c9b970f35c6b 100644
--- a/drivers/mtd/spi-nor/core.c
+++ b/drivers/mtd/spi-nor/core.c
@@ -7,6 +7,7 @@
  * Copyright (C) 2014, Freescale Semiconductor, Inc.
  */
 
+#include <linux/cleanup.h>
 #include <linux/delay.h>
 #include <linux/device.h>
 #include <linux/err.h>
@@ -639,32 +640,26 @@ static bool spi_nor_use_parallel_locking(struct spi_nor *nor)
 static int spi_nor_rww_start_rdst(struct spi_nor *nor)
 {
 	struct spi_nor_rww *rww = &nor->rww;
-	int ret = -EAGAIN;
 
-	mutex_lock(&nor->lock);
+	guard(mutex)(&nor->lock);
 
 	if (rww->ongoing_io || rww->ongoing_rd)
-		goto busy;
+		return -EAGAIN;
 
 	rww->ongoing_io = true;
 	rww->ongoing_rd = true;
-	ret = 0;
 
-busy:
-	mutex_unlock(&nor->lock);
-	return ret;
+	return 0;
 }
 
 static void spi_nor_rww_end_rdst(struct spi_nor *nor)
 {
 	struct spi_nor_rww *rww = &nor->rww;
 
-	mutex_lock(&nor->lock);
+	guard(mutex)(&nor->lock);
 
 	rww->ongoing_io = false;
 	rww->ongoing_rd = false;
-
-	mutex_unlock(&nor->lock);
 }
 
 static int spi_nor_lock_rdst(struct spi_nor *nor)
@@ -1212,26 +1207,21 @@ static void spi_nor_offset_to_banks(u64 bank_size, loff_t start, size_t len,
 static bool spi_nor_rww_start_io(struct spi_nor *nor)
 {
 	struct spi_nor_rww *rww = &nor->rww;
-	bool start = false;
 
-	mutex_lock(&nor->lock);
+	guard(mutex)(&nor->lock);
 
 	if (rww->ongoing_io)
-		goto busy;
+		return false;
 
 	rww->ongoing_io = true;
-	start = true;
 
-busy:
-	mutex_unlock(&nor->lock);
-	return start;
+	return true;
 }
 
 static void spi_nor_rww_end_io(struct spi_nor *nor)
 {
-	mutex_lock(&nor->lock);
+	guard(mutex)(&nor->lock);
 	nor->rww.ongoing_io = false;
-	mutex_unlock(&nor->lock);
 }
 
 static int spi_nor_lock_device(struct spi_nor *nor)
@@ -1254,32 +1244,27 @@ static void spi_nor_unlock_device(struct spi_nor *nor)
 static bool spi_nor_rww_start_exclusive(struct spi_nor *nor)
 {
 	struct spi_nor_rww *rww = &nor->rww;
-	bool start = false;
 
 	mutex_lock(&nor->lock);
 
 	if (rww->ongoing_io || rww->ongoing_rd || rww->ongoing_pe)
-		goto busy;
+		return false;
 
 	rww->ongoing_io = true;
 	rww->ongoing_rd = true;
 	rww->ongoing_pe = true;
-	start = true;
 
-busy:
-	mutex_unlock(&nor->lock);
-	return start;
+	return true;
 }
 
 static void spi_nor_rww_end_exclusive(struct spi_nor *nor)
 {
 	struct spi_nor_rww *rww = &nor->rww;
 
-	mutex_lock(&nor->lock);
+	guard(mutex)(&nor->lock);
 	rww->ongoing_io = false;
 	rww->ongoing_rd = false;
 	rww->ongoing_pe = false;
-	mutex_unlock(&nor->lock);
 }
 
 int spi_nor_prep_and_lock(struct spi_nor *nor)
@@ -1316,30 +1301,26 @@ static bool spi_nor_rww_start_pe(struct spi_nor *nor, loff_t start, size_t len)
 {
 	struct spi_nor_rww *rww = &nor->rww;
 	unsigned int used_banks = 0;
-	bool started = false;
 	u8 first, last;
 	int bank;
 
-	mutex_lock(&nor->lock);
+	guard(mutex)(&nor->lock);
 
 	if (rww->ongoing_io || rww->ongoing_rd || rww->ongoing_pe)
-		goto busy;
+		return false;
 
 	spi_nor_offset_to_banks(nor->params->bank_size, start, len, &first, &last);
 	for (bank = first; bank <= last; bank++) {
 		if (rww->used_banks & BIT(bank))
-			goto busy;
+			return false;
 
 		used_banks |= BIT(bank);
 	}
 
 	rww->used_banks |= used_banks;
 	rww->ongoing_pe = true;
-	started = true;
 
-busy:
-	mutex_unlock(&nor->lock);
-	return started;
+	return true;
 }
 
 static void spi_nor_rww_end_pe(struct spi_nor *nor, loff_t start, size_t len)
@@ -1348,15 +1329,13 @@ static void spi_nor_rww_end_pe(struct spi_nor *nor, loff_t start, size_t len)
 	u8 first, last;
 	int bank;
 
-	mutex_lock(&nor->lock);
+	guard(mutex)(&nor->lock);
 
 	spi_nor_offset_to_banks(nor->params->bank_size, start, len, &first, &last);
 	for (bank = first; bank <= last; bank++)
 		rww->used_banks &= ~BIT(bank);
 
 	rww->ongoing_pe = false;
-
-	mutex_unlock(&nor->lock);
 }
 
 static int spi_nor_prep_and_lock_pe(struct spi_nor *nor, loff_t start, size_t len)
@@ -1393,19 +1372,18 @@ static bool spi_nor_rww_start_rd(struct spi_nor *nor, loff_t start, size_t len)
 {
 	struct spi_nor_rww *rww = &nor->rww;
 	unsigned int used_banks = 0;
-	bool started = false;
 	u8 first, last;
 	int bank;
 
-	mutex_lock(&nor->lock);
+	guard(mutex)(&nor->lock);
 
 	if (rww->ongoing_io || rww->ongoing_rd)
-		goto busy;
+		return false;
 
 	spi_nor_offset_to_banks(nor->params->bank_size, start, len, &first, &last);
 	for (bank = first; bank <= last; bank++) {
 		if (rww->used_banks & BIT(bank))
-			goto busy;
+			return false;
 
 		used_banks |= BIT(bank);
 	}
@@ -1413,11 +1391,8 @@ static bool spi_nor_rww_start_rd(struct spi_nor *nor, loff_t start, size_t len)
 	rww->used_banks |= used_banks;
 	rww->ongoing_io = true;
 	rww->ongoing_rd = true;
-	started = true;
 
-busy:
-	mutex_unlock(&nor->lock);
-	return started;
+	return true;
 }
 
 static void spi_nor_rww_end_rd(struct spi_nor *nor, loff_t start, size_t len)
@@ -1426,7 +1401,7 @@ static void spi_nor_rww_end_rd(struct spi_nor *nor, loff_t start, size_t len)
 	u8 first, last;
 	int bank;
 
-	mutex_lock(&nor->lock);
+	guard(mutex)(&nor->lock);
 
 	spi_nor_offset_to_banks(nor->params->bank_size, start, len, &first, &last);
 	for (bank = first; bank <= last; bank++)
@@ -1434,8 +1409,6 @@ static void spi_nor_rww_end_rd(struct spi_nor *nor, loff_t start, size_t len)
 
 	rww->ongoing_io = false;
 	rww->ongoing_rd = false;
-
-	mutex_unlock(&nor->lock);
 }
 
 static int spi_nor_prep_and_lock_rd(struct spi_nor *nor, loff_t start, size_t len)

-- 
2.48.1.502.g6dc24dfdaf-goog


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Re: [PATCH 2/2] mtd: spi-nor: use scope-based mutex cleanup helpers

[Pratyush Yadav]

On Tue, Feb 11 2025, Tudor Ambarus wrote:

> Use scope-based mutex clenup helpers, it reduces the code size.

Neat! I didn't know these existed. BTW, s/clenup/cleanup/

Reviewed-by: Pratyush Yadav <pratyush@kernel.org>

-- 
Regards,
Pratyush Yadav

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Re: [PATCH 1/2] mtd: spi-nor: sort headers alphabetically

[Pratyush Yadav]

On Tue, Feb 11 2025, Tudor Ambarus wrote:

> Sorting headers alphabetically helps locating duplicates,
> and makes it easier to figure out where to insert new headers.
>
> Signed-off-by: Tudor Ambarus <tudor.ambarus@linaro.org>

Reviewed-by: Pratyush Yadav <pratyush@kernel.org>

-- 
Regards,
Pratyush Yadav

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Re: [PATCH 1/2] mtd: spi-nor: sort headers alphabetically

[Pratyush Yadav]

On Tue, Feb 11 2025, Tudor Ambarus wrote:

> Sorting headers alphabetically helps locating duplicates,
> and makes it easier to figure out where to insert new headers.

Series applied to spi-nor/next. Thanks!

-- 
Regards,
Pratyush Yadav

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