* [PATCH] most: core: Use sysfs_emit in sysfs show functions
@ 2026-02-25 18:20 Thorsten Blum
0 siblings, 0 replies; only message in thread
From: Thorsten Blum @ 2026-02-25 18:20 UTC (permalink / raw)
To: Parthiban Veerasooran, Christian Gromm; +Cc: Thorsten Blum, linux-kernel
Replace snprintf() with sysfs_emit() in sysfs show functions.
sysfs_emit() is preferred for formatting sysfs output because it
provides safer bounds checking. In components_show() and print_links(),
use sysfs_emit_at() to avoid manual buffer size accounting.
Signed-off-by: Thorsten Blum <thorsten.blum@linux.dev>
---
drivers/most/core.c | 87 +++++++++++++++++++++------------------------
1 file changed, 40 insertions(+), 47 deletions(-)
diff --git a/drivers/most/core.c b/drivers/most/core.c
index c2616da8bceb..64766c021677 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 +294,9 @@ 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 +305,7 @@ 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 +314,7 @@ 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 +322,7 @@ 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 +394,7 @@ 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 +405,25 @@ 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);
@@ -471,20 +470,16 @@ static int print_links(struct device *dev, void *data)
list_for_each_entry(c, &iface->p->channel_list, list) {
if (c->pipe0.comp) {
- offs += scnprintf(buf + offs,
- PAGE_SIZE - offs,
- "%s:%s:%s\n",
- c->pipe0.comp->name,
- dev_name(iface->dev),
- dev_name(&c->dev));
+ offs += sysfs_emit_at(buf, offs, "%s:%s:%s\n",
+ c->pipe0.comp->name,
+ dev_name(iface->dev),
+ dev_name(&c->dev));
}
if (c->pipe1.comp) {
- offs += scnprintf(buf + offs,
- PAGE_SIZE - offs,
- "%s:%s:%s\n",
- c->pipe1.comp->name,
- dev_name(iface->dev),
- dev_name(&c->dev));
+ offs += sysfs_emit_at(buf, offs, "%s:%s:%s\n",
+ c->pipe1.comp->name,
+ dev_name(iface->dev),
+ dev_name(&c->dev));
}
}
d->offs = offs;
@@ -517,10 +512,8 @@ static ssize_t components_show(struct device_driver *drv, char *buf)
struct most_component *comp;
int offs = 0;
- list_for_each_entry(comp, &comp_list, list) {
- offs += scnprintf(buf + offs, PAGE_SIZE - offs, "%s\n",
- comp->name);
- }
+ list_for_each_entry(comp, &comp_list, list)
+ offs += sysfs_emit_at(buf, offs, "%s\n", comp->name);
return offs;
}
--
Thorsten Blum <thorsten.blum@linux.dev>
GPG: 1D60 735E 8AEF 3BE4 73B6 9D84 7336 78FD 8DFE EAD4
^ permalink raw reply related [flat|nested] only message in thread
only message in thread, other threads:[~2026-02-25 18:20 UTC | newest]
Thread overview: (only message) (download: mbox.gz follow: Atom feed
-- links below jump to the message on this page --
2026-02-25 18:20 [PATCH] most: core: Use sysfs_emit in sysfs show functions Thorsten Blum
This is a public inbox, see mirroring instructions
for how to clone and mirror all data and code used for this inbox