i3c: master: Replace sprintf() with sysfs_emit() family

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>
Reviewed-by: Frank Li <Frank.Li@nxp.com>
Link: https://patch.msgid.link/20260421214837.20939-1-m32285159@gmail.com
Signed-off-by: Alexandre Belloni <alexandre.belloni@bootlin.com>

diff --git a/drivers/i3c/master.c b/drivers/i3c/master.c
index 5cd4e5da22333d85ea31d091f1d7ae125c076382..6b8df8089a357f20a36a3f75effcbdc13259a67a 100644 (file)
--- 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;