memstick/mspro_block: Convert to use sysfs_emit()/sysfs_emit_at() APIs

Follow the advice of the Documentation/filesystems/sysfs.rst and show()
should only use sysfs_emit() or sysfs_emit_at() when formatting the
value to be returned to user space.
Signed-off-by: ye xingchen <ye.xingchen@zte.com.cn>
Link: https://lore.kernel.org/r/202212081138191215291@zte.com.cnSigned-off-by: Ulf Hansson <ulf.hansson@linaro.org>

drivers/memstick/core/mspro_block.c

@@ -260,7 +260,7 @@ static ssize_t mspro_block_attr_show_default(struct device *dev,
 				buffer[rc++] = '\n';
 		}
 
-		rc += scnprintf(buffer + rc, PAGE_SIZE - rc, "%02x ",
+		rc += sysfs_emit_at(buffer, rc, "%02x ",
 				    ((unsigned char *)s_attr->data)[cnt]);
 	}
 	return rc;
@@ -290,61 +290,43 @@ static ssize_t mspro_block_attr_show_sysinfo(struct device *dev,
 		date_tz_f *= 15;
 	}
 
-	rc += scnprintf(buffer + rc, PAGE_SIZE - rc, "class: %x\n",
-			x_sys->class);
-	rc += scnprintf(buffer + rc, PAGE_SIZE - rc, "block size: %x\n",
-			be16_to_cpu(x_sys->block_size));
-	rc += scnprintf(buffer + rc, PAGE_SIZE - rc, "block count: %x\n",
-			be16_to_cpu(x_sys->block_count));
-	rc += scnprintf(buffer + rc, PAGE_SIZE - rc, "user block count: %x\n",
+	rc += sysfs_emit_at(buffer, rc, "class: %x\n", x_sys->class);
+	rc += sysfs_emit_at(buffer, rc, "block size: %x\n", be16_to_cpu(x_sys->block_size));
+	rc += sysfs_emit_at(buffer, rc, "block count: %x\n", be16_to_cpu(x_sys->block_count));
+	rc += sysfs_emit_at(buffer, rc, "user block count: %x\n",
 			    be16_to_cpu(x_sys->user_block_count));
-	rc += scnprintf(buffer + rc, PAGE_SIZE - rc, "page size: %x\n",
-			be16_to_cpu(x_sys->page_size));
-	rc += scnprintf(buffer + rc, PAGE_SIZE - rc, "assembly date: "
-			"GMT%+d:%d %04u-%02u-%02u %02u:%02u:%02u\n",
+	rc += sysfs_emit_at(buffer, rc, "page size: %x\n", be16_to_cpu(x_sys->page_size));
+	rc += sysfs_emit_at(buffer, rc, "assembly date: GMT%+d:%d %04u-%02u-%02u %02u:%02u:%02u\n",
 			    date_tz, date_tz_f,
 			    be16_to_cpup((__be16 *)&x_sys->assembly_date[1]),
 			    x_sys->assembly_date[3], x_sys->assembly_date[4],
 			    x_sys->assembly_date[5], x_sys->assembly_date[6],
 			    x_sys->assembly_date[7]);
-	rc += scnprintf(buffer + rc, PAGE_SIZE - rc, "serial number: %x\n",
-			be32_to_cpu(x_sys->serial_number));
-	rc += scnprintf(buffer + rc, PAGE_SIZE - rc,
-			"assembly maker code: %x\n",
-			x_sys->assembly_maker_code);
-	rc += scnprintf(buffer + rc, PAGE_SIZE - rc, "assembly model code: "
-			"%02x%02x%02x\n", x_sys->assembly_model_code[0],
+	rc += sysfs_emit_at(buffer, rc, "serial number: %x\n", be32_to_cpu(x_sys->serial_number));
+	rc += sysfs_emit_at(buffer, rc, "assembly maker code: %x\n", x_sys->assembly_maker_code);
+	rc += sysfs_emit_at(buffer, rc, "assembly model code: %02x%02x%02x\n",
+			    x_sys->assembly_model_code[0],
 			    x_sys->assembly_model_code[1],
 			    x_sys->assembly_model_code[2]);
-	rc += scnprintf(buffer + rc, PAGE_SIZE - rc, "memory maker code: %x\n",
+	rc += sysfs_emit_at(buffer, rc, "memory maker code: %x\n",
 			    be16_to_cpu(x_sys->memory_maker_code));
-	rc += scnprintf(buffer + rc, PAGE_SIZE - rc, "memory model code: %x\n",
+	rc += sysfs_emit_at(buffer, rc, "memory model code: %x\n",
 			    be16_to_cpu(x_sys->memory_model_code));
-	rc += scnprintf(buffer + rc, PAGE_SIZE - rc, "vcc: %x\n",
-			x_sys->vcc);
-	rc += scnprintf(buffer + rc, PAGE_SIZE - rc, "vpp: %x\n",
-			x_sys->vpp);
-	rc += scnprintf(buffer + rc, PAGE_SIZE - rc, "controller number: %x\n",
+	rc += sysfs_emit_at(buffer, rc, "vcc: %x\n", x_sys->vcc);
+	rc += sysfs_emit_at(buffer, rc, "vpp: %x\n", x_sys->vpp);
+	rc += sysfs_emit_at(buffer, rc, "controller number: %x\n",
 			    be16_to_cpu(x_sys->controller_number));
-	rc += scnprintf(buffer + rc, PAGE_SIZE - rc,
-			"controller function: %x\n",
+	rc += sysfs_emit_at(buffer, rc, "controller function: %x\n",
 			    be16_to_cpu(x_sys->controller_function));
-	rc += scnprintf(buffer + rc, PAGE_SIZE - rc, "start sector: %x\n",
-			be16_to_cpu(x_sys->start_sector));
-	rc += scnprintf(buffer + rc, PAGE_SIZE - rc, "unit size: %x\n",
-			be16_to_cpu(x_sys->unit_size));
-	rc += scnprintf(buffer + rc, PAGE_SIZE - rc, "sub class: %x\n",
-			x_sys->ms_sub_class);
-	rc += scnprintf(buffer + rc, PAGE_SIZE - rc, "interface type: %x\n",
-			x_sys->interface_type);
-	rc += scnprintf(buffer + rc, PAGE_SIZE - rc, "controller code: %x\n",
+	rc += sysfs_emit_at(buffer, rc, "start sector: %x\n", be16_to_cpu(x_sys->start_sector));
+	rc += sysfs_emit_at(buffer, rc, "unit size: %x\n", be16_to_cpu(x_sys->unit_size));
+	rc += sysfs_emit_at(buffer, rc, "sub class: %x\n", x_sys->ms_sub_class);
+	rc += sysfs_emit_at(buffer, rc, "interface type: %x\n", x_sys->interface_type);
+	rc += sysfs_emit_at(buffer, rc, "controller code: %x\n",
 			    be16_to_cpu(x_sys->controller_code));
-	rc += scnprintf(buffer + rc, PAGE_SIZE - rc, "format type: %x\n",
-			x_sys->format_type);
-	rc += scnprintf(buffer + rc, PAGE_SIZE - rc, "device type: %x\n",
-			x_sys->device_type);
-	rc += scnprintf(buffer + rc, PAGE_SIZE - rc, "mspro id: %s\n",
-			x_sys->mspro_id);
+	rc += sysfs_emit_at(buffer, rc, "format type: %x\n", x_sys->format_type);
+	rc += sysfs_emit_at(buffer, rc, "device type: %x\n", x_sys->device_type);
+	rc += sysfs_emit_at(buffer, rc, "mspro id: %s\n", x_sys->mspro_id);
 	return rc;
 }
 
@@ -356,7 +338,7 @@ static ssize_t mspro_block_attr_show_modelname(struct device *dev,
 						     struct mspro_sys_attr,
 						     dev_attr);
 
-	return scnprintf(buffer, PAGE_SIZE, "%s", (char *)s_attr->data);
+	return sysfs_emit(buffer, "%s", (char *)s_attr->data);
 }
 
 static ssize_t mspro_block_attr_show_mbr(struct device *dev,
@@ -369,26 +351,16 @@ static ssize_t mspro_block_attr_show_mbr(struct device *dev,
 	struct mspro_mbr *x_mbr = x_attr->data;
 	ssize_t rc = 0;
 
-	rc += scnprintf(buffer + rc, PAGE_SIZE - rc, "boot partition: %x\n",
-			x_mbr->boot_partition);
-	rc += scnprintf(buffer + rc, PAGE_SIZE - rc, "start head: %x\n",
-			x_mbr->start_head);
-	rc += scnprintf(buffer + rc, PAGE_SIZE - rc, "start sector: %x\n",
-			x_mbr->start_sector);
-	rc += scnprintf(buffer + rc, PAGE_SIZE - rc, "start cylinder: %x\n",
-			x_mbr->start_cylinder);
-	rc += scnprintf(buffer + rc, PAGE_SIZE - rc, "partition type: %x\n",
-			x_mbr->partition_type);
-	rc += scnprintf(buffer + rc, PAGE_SIZE - rc, "end head: %x\n",
-			x_mbr->end_head);
-	rc += scnprintf(buffer + rc, PAGE_SIZE - rc, "end sector: %x\n",
-			x_mbr->end_sector);
-	rc += scnprintf(buffer + rc, PAGE_SIZE - rc, "end cylinder: %x\n",
-			x_mbr->end_cylinder);
-	rc += scnprintf(buffer + rc, PAGE_SIZE - rc, "start sectors: %x\n",
-			x_mbr->start_sectors);
-	rc += scnprintf(buffer + rc, PAGE_SIZE - rc,
-			"sectors per partition: %x\n",
+	rc += sysfs_emit_at(buffer, rc, "boot partition: %x\n", x_mbr->boot_partition);
+	rc += sysfs_emit_at(buffer, rc, "start head: %x\n", x_mbr->start_head);
+	rc += sysfs_emit_at(buffer, rc, "start sector: %x\n", x_mbr->start_sector);
+	rc += sysfs_emit_at(buffer, rc, "start cylinder: %x\n", x_mbr->start_cylinder);
+	rc += sysfs_emit_at(buffer, rc, "partition type: %x\n", x_mbr->partition_type);
+	rc += sysfs_emit_at(buffer, rc, "end head: %x\n", x_mbr->end_head);
+	rc += sysfs_emit_at(buffer, rc, "end sector: %x\n", x_mbr->end_sector);
+	rc += sysfs_emit_at(buffer, rc, "end cylinder: %x\n", x_mbr->end_cylinder);
+	rc += sysfs_emit_at(buffer, rc, "start sectors: %x\n", x_mbr->start_sectors);
+	rc += sysfs_emit_at(buffer, rc, "sectors per partition: %x\n",
 			    x_mbr->sectors_per_partition);
 	return rc;
 }
@@ -409,22 +381,19 @@ static ssize_t mspro_block_attr_show_specfile(struct device *dev,
 	memcpy(ext, x_spfile->ext, 3);
 	ext[3] = 0;
 
-	rc += scnprintf(buffer + rc, PAGE_SIZE - rc, "name: %s\n", name);
-	rc += scnprintf(buffer + rc, PAGE_SIZE - rc, "ext: %s\n", ext);
-	rc += scnprintf(buffer + rc, PAGE_SIZE - rc, "attribute: %x\n",
-			x_spfile->attr);
-	rc += scnprintf(buffer + rc, PAGE_SIZE - rc, "time: %d:%d:%d\n",
+	rc += sysfs_emit_at(buffer, rc, "name: %s\n", name);
+	rc += sysfs_emit_at(buffer, rc, "ext: %s\n", ext);
+	rc += sysfs_emit_at(buffer, rc, "attribute: %x\n", x_spfile->attr);
+	rc += sysfs_emit_at(buffer, rc, "time: %d:%d:%d\n",
 			    x_spfile->time >> 11,
 			    (x_spfile->time >> 5) & 0x3f,
 			    (x_spfile->time & 0x1f) * 2);
-	rc += scnprintf(buffer + rc, PAGE_SIZE - rc, "date: %d-%d-%d\n",
+	rc += sysfs_emit_at(buffer, rc, "date: %d-%d-%d\n",
 			    (x_spfile->date >> 9) + 1980,
 			    (x_spfile->date >> 5) & 0xf,
 			    x_spfile->date & 0x1f);
-	rc += scnprintf(buffer + rc, PAGE_SIZE - rc, "start cluster: %x\n",
-			x_spfile->cluster);
-	rc += scnprintf(buffer + rc, PAGE_SIZE - rc, "size: %x\n",
-			x_spfile->size);
+	rc += sysfs_emit_at(buffer, rc, "start cluster: %x\n", x_spfile->cluster);
+	rc += sysfs_emit_at(buffer, rc, "size: %x\n", x_spfile->size);
 	return rc;
 }
 
@@ -438,15 +407,13 @@ static ssize_t mspro_block_attr_show_devinfo(struct device *dev,
 	struct mspro_devinfo *x_devinfo = x_attr->data;
 	ssize_t rc = 0;
 
-	rc += scnprintf(buffer + rc, PAGE_SIZE - rc, "cylinders: %x\n",
-			be16_to_cpu(x_devinfo->cylinders));
-	rc += scnprintf(buffer + rc, PAGE_SIZE - rc, "heads: %x\n",
-			be16_to_cpu(x_devinfo->heads));
-	rc += scnprintf(buffer + rc, PAGE_SIZE - rc, "bytes per track: %x\n",
+	rc += sysfs_emit_at(buffer, rc, "cylinders: %x\n", be16_to_cpu(x_devinfo->cylinders));
+	rc += sysfs_emit_at(buffer, rc, "heads: %x\n", be16_to_cpu(x_devinfo->heads));
+	rc += sysfs_emit_at(buffer, rc, "bytes per track: %x\n",
 			    be16_to_cpu(x_devinfo->bytes_per_track));
-	rc += scnprintf(buffer + rc, PAGE_SIZE - rc, "bytes per sector: %x\n",
+	rc += sysfs_emit_at(buffer, rc, "bytes per sector: %x\n",
 			    be16_to_cpu(x_devinfo->bytes_per_sector));
-	rc += scnprintf(buffer + rc, PAGE_SIZE - rc, "sectors per track: %x\n",
+	rc += sysfs_emit_at(buffer, rc, "sectors per track: %x\n",
 			    be16_to_cpu(x_devinfo->sectors_per_track));
 	return rc;
 }