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From: Maxwell Doose <m32285159@gmail.com>
To: alexandre.belloni@bootlin.com
Cc: Frank.Li@nxp.com, linux-i3c@lists.infradead.org,
	linux-kernel@vger.kernel.org
Subject: [PATCH v2] i3c: master: Replace sprintf() with sysfs_emit() family
Date: Tue, 21 Apr 2026 16:48:37 -0500	[thread overview]
Message-ID: <20260421214837.20939-1-m32285159@gmail.com> (raw)

Replace sprintf() function calls with sysfs_emit() and
sysfs_emit_at() function calls where appropriate. This will help
harden the driver and help modernize it. While at it, add missing
newlines at the end of some sysfs_emit() (formerly sprintf()) calls.

Signed-off-by: Maxwell Doose <m32285159@gmail.com>
---
 v2:
 - Change commit message to use imperative voice as suggested by Frank
   Li.

 drivers/i3c/master.c | 26 +++++++++++++-------------
 1 file changed, 13 insertions(+), 13 deletions(-)

diff --git a/drivers/i3c/master.c b/drivers/i3c/master.c
index 9e6be49bebb2..c0d19eae06b9 100644
--- a/drivers/i3c/master.c
+++ b/drivers/i3c/master.c
@@ -174,7 +174,7 @@ static ssize_t bcr_show(struct device *dev,
 
 	i3c_bus_normaluse_lock(bus);
 	desc = dev_to_i3cdesc(dev);
-	ret = sprintf(buf, "0x%02x\n", desc->info.bcr);
+	ret = sysfs_emit(buf, "0x%02x\n", desc->info.bcr);
 	i3c_bus_normaluse_unlock(bus);
 
 	return ret;
@@ -191,7 +191,7 @@ static ssize_t dcr_show(struct device *dev,
 
 	i3c_bus_normaluse_lock(bus);
 	desc = dev_to_i3cdesc(dev);
-	ret = sprintf(buf, "0x%02x\n", desc->info.dcr);
+	ret = sysfs_emit(buf, "0x%02x\n", desc->info.dcr);
 	i3c_bus_normaluse_unlock(bus);
 
 	return ret;
@@ -208,7 +208,7 @@ static ssize_t pid_show(struct device *dev,
 
 	i3c_bus_normaluse_lock(bus);
 	desc = dev_to_i3cdesc(dev);
-	ret = sprintf(buf, "%llx\n", desc->info.pid);
+	ret = sysfs_emit(buf, "%llx\n", desc->info.pid);
 	i3c_bus_normaluse_unlock(bus);
 
 	return ret;
@@ -225,7 +225,7 @@ static ssize_t dynamic_address_show(struct device *dev,
 
 	i3c_bus_normaluse_lock(bus);
 	desc = dev_to_i3cdesc(dev);
-	ret = sprintf(buf, "%02x\n", desc->info.dyn_addr);
+	ret = sysfs_emit(buf, "%02x\n", desc->info.dyn_addr);
 	i3c_bus_normaluse_unlock(bus);
 
 	return ret;
@@ -256,7 +256,7 @@ static ssize_t hdrcap_show(struct device *dev,
 		if (!hdrcap_strings[mode])
 			continue;
 
-		ret = sprintf(buf + offset, offset ? " %s" : "%s",
+		ret = sysfs_emit_at(buf, offset, offset ? " %s" : "%s",
 			      hdrcap_strings[mode]);
 		if (ret < 0)
 			goto out;
@@ -264,7 +264,7 @@ static ssize_t hdrcap_show(struct device *dev,
 		offset += ret;
 	}
 
-	ret = sprintf(buf + offset, "\n");
+	ret = sysfs_emit_at(buf, offset, "\n");
 	if (ret < 0)
 		goto out;
 
@@ -290,10 +290,10 @@ static ssize_t modalias_show(struct device *dev,
 	ext = I3C_PID_EXTRA_INFO(devinfo.pid);
 
 	if (I3C_PID_RND_LOWER_32BITS(devinfo.pid))
-		return sprintf(buf, "i3c:dcr%02Xmanuf%04X", devinfo.dcr,
+		return sysfs_emit(buf, "i3c:dcr%02Xmanuf%04X\n", devinfo.dcr,
 			       manuf);
 
-	return sprintf(buf, "i3c:dcr%02Xmanuf%04Xpart%04Xext%04X",
+	return sysfs_emit(buf, "i3c:dcr%02Xmanuf%04Xpart%04Xext%04X\n",
 		       devinfo.dcr, manuf, part, ext);
 }
 static DEVICE_ATTR_RO(modalias);
@@ -578,9 +578,9 @@ static ssize_t mode_show(struct device *dev,
 	if (i3cbus->mode < 0 ||
 	    i3cbus->mode >= ARRAY_SIZE(i3c_bus_mode_strings) ||
 	    !i3c_bus_mode_strings[i3cbus->mode])
-		ret = sprintf(buf, "unknown\n");
+		ret = sysfs_emit(buf, "unknown\n");
 	else
-		ret = sprintf(buf, "%s\n", i3c_bus_mode_strings[i3cbus->mode]);
+		ret = sysfs_emit(buf, "%s\n", i3c_bus_mode_strings[i3cbus->mode]);
 	i3c_bus_normaluse_unlock(i3cbus);
 
 	return ret;
@@ -595,7 +595,7 @@ static ssize_t current_master_show(struct device *dev,
 	ssize_t ret;
 
 	i3c_bus_normaluse_lock(i3cbus);
-	ret = sprintf(buf, "%d-%llx\n", i3cbus->id,
+	ret = sysfs_emit(buf, "%d-%llx\n", i3cbus->id,
 		      i3cbus->cur_master->info.pid);
 	i3c_bus_normaluse_unlock(i3cbus);
 
@@ -611,7 +611,7 @@ static ssize_t i3c_scl_frequency_show(struct device *dev,
 	ssize_t ret;
 
 	i3c_bus_normaluse_lock(i3cbus);
-	ret = sprintf(buf, "%ld\n", i3cbus->scl_rate.i3c);
+	ret = sysfs_emit(buf, "%ld\n", i3cbus->scl_rate.i3c);
 	i3c_bus_normaluse_unlock(i3cbus);
 
 	return ret;
@@ -626,7 +626,7 @@ static ssize_t i2c_scl_frequency_show(struct device *dev,
 	ssize_t ret;
 
 	i3c_bus_normaluse_lock(i3cbus);
-	ret = sprintf(buf, "%ld\n", i3cbus->scl_rate.i2c);
+	ret = sysfs_emit(buf, "%ld\n", i3cbus->scl_rate.i2c);
 	i3c_bus_normaluse_unlock(i3cbus);
 
 	return ret;
-- 
2.53.0


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             reply	other threads:[~2026-04-21 21:48 UTC|newest]

Thread overview: 3+ messages / expand[flat|nested]  mbox.gz  Atom feed  top
2026-04-21 21:48 Maxwell Doose [this message]
2026-04-22  3:59 ` [PATCH v2] i3c: master: Replace sprintf() with sysfs_emit() family Frank Li
2026-04-30 10:02 ` Alexandre Belloni

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