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From: Li Zhijian <lizhijian@fujitsu.com>
To: linux-kernel@vger.kernel.org
Cc: Li Zhijian <lizhijian@fujitsu.com>,
	Parthiban Veerasooran <parthiban.veerasooran@microchip.com>,
	Christian Gromm <christian.gromm@microchip.com>
Subject: [PATCH v2] most: core: Convert sprintf/snprintf to sysfs_emit
Date: Thu, 14 Mar 2024 17:15:40 +0800
Message-Id: <20240314091540.1323705-1-lizhijian@fujitsu.com>
Precedence: bulk
MIME-Version: 1.0
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Per filesystems/sysfs.rst, show() should only use sysfs_emit()
or sysfs_emit_at() when formatting the value to be returned to user space.

coccinelle complains that there are still a couple of functions that use
snprintf(). Convert them to sysfs_emit().

sprintf() will be converted as weel if they have.

Generally, this patch is generated by
make coccicheck M=<path/to/file> MODE=patch \
COCCI=scripts/coccinelle/api/device_attr_show.cocci

No functional change intended

CC: Parthiban Veerasooran <parthiban.veerasooran@microchip.com>
CC: Christian Gromm <christian.gromm@microchip.com>
Signed-off-by: Li Zhijian <lizhijian@fujitsu.com>
---
This is a part of the work "Fix coccicheck device_attr_show warnings"[1]
Split them per subsystem so that the maintainer can review it easily
[1] https://lore.kernel.org/lkml/20240116041129.3937800-1-lizhijian@fujitsu.com/
---
 drivers/most/core.c | 62 ++++++++++++++++++++++-----------------------
 1 file changed, 31 insertions(+), 31 deletions(-)

diff --git a/drivers/most/core.c b/drivers/most/core.c
index e4412c7d25b0..412cb34ce768 100644
--- a/drivers/most/core.c
+++ b/drivers/most/core.c
@@ -208,8 +208,8 @@ static ssize_t number_of_packet_buffers_show(struct device *dev,
 	struct most_channel *c = to_channel(dev);
 	unsigned int i = c->channel_id;
 
-	return snprintf(buf, PAGE_SIZE, "%d\n",
-			c->iface->channel_vector[i].num_buffers_packet);
+	return sysfs_emit(buf, "%d\n",
+			  c->iface->channel_vector[i].num_buffers_packet);
 }
 
 static ssize_t number_of_stream_buffers_show(struct device *dev,
@@ -219,8 +219,8 @@ static ssize_t number_of_stream_buffers_show(struct device *dev,
 	struct most_channel *c = to_channel(dev);
 	unsigned int i = c->channel_id;
 
-	return snprintf(buf, PAGE_SIZE, "%d\n",
-			c->iface->channel_vector[i].num_buffers_streaming);
+	return sysfs_emit(buf, "%d\n",
+			  c->iface->channel_vector[i].num_buffers_streaming);
 }
 
 static ssize_t size_of_packet_buffer_show(struct device *dev,
@@ -230,8 +230,8 @@ static ssize_t size_of_packet_buffer_show(struct device *dev,
 	struct most_channel *c = to_channel(dev);
 	unsigned int i = c->channel_id;
 
-	return snprintf(buf, PAGE_SIZE, "%d\n",
-			c->iface->channel_vector[i].buffer_size_packet);
+	return sysfs_emit(buf, "%d\n",
+			  c->iface->channel_vector[i].buffer_size_packet);
 }
 
 static ssize_t size_of_stream_buffer_show(struct device *dev,
@@ -241,8 +241,8 @@ static ssize_t size_of_stream_buffer_show(struct device *dev,
 	struct most_channel *c = to_channel(dev);
 	unsigned int i = c->channel_id;
 
-	return snprintf(buf, PAGE_SIZE, "%d\n",
-			c->iface->channel_vector[i].buffer_size_streaming);
+	return sysfs_emit(buf, "%d\n",
+			  c->iface->channel_vector[i].buffer_size_streaming);
 }
 
 static ssize_t channel_starving_show(struct device *dev,
@@ -251,7 +251,7 @@ static ssize_t channel_starving_show(struct device *dev,
 {
 	struct most_channel *c = to_channel(dev);
 
-	return snprintf(buf, PAGE_SIZE, "%d\n", c->is_starving);
+	return sysfs_emit(buf, "%d\n", c->is_starving);
 }
 
 static ssize_t set_number_of_buffers_show(struct device *dev,
@@ -260,7 +260,7 @@ static ssize_t set_number_of_buffers_show(struct device *dev,
 {
 	struct most_channel *c = to_channel(dev);
 
-	return snprintf(buf, PAGE_SIZE, "%d\n", c->cfg.num_buffers);
+	return sysfs_emit(buf, "%d\n", c->cfg.num_buffers);
 }
 
 static ssize_t set_buffer_size_show(struct device *dev,
@@ -269,7 +269,7 @@ static ssize_t set_buffer_size_show(struct device *dev,
 {
 	struct most_channel *c = to_channel(dev);
 
-	return snprintf(buf, PAGE_SIZE, "%d\n", c->cfg.buffer_size);
+	return sysfs_emit(buf, "%d\n", c->cfg.buffer_size);
 }
 
 static ssize_t set_direction_show(struct device *dev,
@@ -279,10 +279,10 @@ static ssize_t set_direction_show(struct device *dev,
 	struct most_channel *c = to_channel(dev);
 
 	if (c->cfg.direction & MOST_CH_TX)
-		return snprintf(buf, PAGE_SIZE, "tx\n");
+		return sysfs_emit(buf, "tx\n");
 	else if (c->cfg.direction & MOST_CH_RX)
-		return snprintf(buf, PAGE_SIZE, "rx\n");
-	return snprintf(buf, PAGE_SIZE, "unconfigured\n");
+		return sysfs_emit(buf, "rx\n");
+	return sysfs_emit(buf, "unconfigured\n");
 }
 
 static ssize_t set_datatype_show(struct device *dev,
@@ -294,10 +294,10 @@ static ssize_t set_datatype_show(struct device *dev,
 
 	for (i = 0; i < ARRAY_SIZE(ch_data_type); i++) {
 		if (c->cfg.data_type & ch_data_type[i].most_ch_data_type)
-			return snprintf(buf, PAGE_SIZE, "%s",
-					ch_data_type[i].name);
+			return sysfs_emit(buf, "%s",
+					  ch_data_type[i].name);
 	}
-	return snprintf(buf, PAGE_SIZE, "unconfigured\n");
+	return sysfs_emit(buf, "unconfigured\n");
 }
 
 static ssize_t set_subbuffer_size_show(struct device *dev,
@@ -306,7 +306,7 @@ static ssize_t set_subbuffer_size_show(struct device *dev,
 {
 	struct most_channel *c = to_channel(dev);
 
-	return snprintf(buf, PAGE_SIZE, "%d\n", c->cfg.subbuffer_size);
+	return sysfs_emit(buf, "%d\n", c->cfg.subbuffer_size);
 }
 
 static ssize_t set_packets_per_xact_show(struct device *dev,
@@ -315,7 +315,7 @@ static ssize_t set_packets_per_xact_show(struct device *dev,
 {
 	struct most_channel *c = to_channel(dev);
 
-	return snprintf(buf, PAGE_SIZE, "%d\n", c->cfg.packets_per_xact);
+	return sysfs_emit(buf, "%d\n", c->cfg.packets_per_xact);
 }
 
 static ssize_t set_dbr_size_show(struct device *dev,
@@ -323,7 +323,7 @@ static ssize_t set_dbr_size_show(struct device *dev,
 {
 	struct most_channel *c = to_channel(dev);
 
-	return snprintf(buf, PAGE_SIZE, "%d\n", c->cfg.dbr_size);
+	return sysfs_emit(buf, "%d\n", c->cfg.dbr_size);
 }
 
 #define to_dev_attr(a) container_of(a, struct device_attribute, attr)
@@ -395,7 +395,7 @@ static ssize_t description_show(struct device *dev,
 {
 	struct most_interface *iface = dev_get_drvdata(dev);
 
-	return snprintf(buf, PAGE_SIZE, "%s\n", iface->description);
+	return sysfs_emit(buf, "%s\n", iface->description);
 }
 
 static ssize_t interface_show(struct device *dev,
@@ -406,25 +406,25 @@ static ssize_t interface_show(struct device *dev,
 
 	switch (iface->interface) {
 	case ITYPE_LOOPBACK:
-		return snprintf(buf, PAGE_SIZE, "loopback\n");
+		return sysfs_emit(buf, "loopback\n");
 	case ITYPE_I2C:
-		return snprintf(buf, PAGE_SIZE, "i2c\n");
+		return sysfs_emit(buf, "i2c\n");
 	case ITYPE_I2S:
-		return snprintf(buf, PAGE_SIZE, "i2s\n");
+		return sysfs_emit(buf, "i2s\n");
 	case ITYPE_TSI:
-		return snprintf(buf, PAGE_SIZE, "tsi\n");
+		return sysfs_emit(buf, "tsi\n");
 	case ITYPE_HBI:
-		return snprintf(buf, PAGE_SIZE, "hbi\n");
+		return sysfs_emit(buf, "hbi\n");
 	case ITYPE_MEDIALB_DIM:
-		return snprintf(buf, PAGE_SIZE, "mlb_dim\n");
+		return sysfs_emit(buf, "mlb_dim\n");
 	case ITYPE_MEDIALB_DIM2:
-		return snprintf(buf, PAGE_SIZE, "mlb_dim2\n");
+		return sysfs_emit(buf, "mlb_dim2\n");
 	case ITYPE_USB:
-		return snprintf(buf, PAGE_SIZE, "usb\n");
+		return sysfs_emit(buf, "usb\n");
 	case ITYPE_PCIE:
-		return snprintf(buf, PAGE_SIZE, "pcie\n");
+		return sysfs_emit(buf, "pcie\n");
 	}
-	return snprintf(buf, PAGE_SIZE, "unknown\n");
+	return sysfs_emit(buf, "unknown\n");
 }
 
 static DEVICE_ATTR_RO(description);
-- 
2.29.2