UBI: gluebi: rename misleading variables

Both names 'total_read' and 'total_written' are actually used
as the number of bytes left to read and write.
Fix this confusion by renaming both to 'bytes_left'.

Signed-off-by: Ezequiel Garcia <[e-mail]>
Signed-off-by: Artem Bityutskiy <[e-mail]>

drivers/mtd/ubi/gluebi.c

···
 static int gluebi_read(struct mtd_info *mtd, loff_t from, size_t len,
 		       size_t *retlen, unsigned char *buf)
 {
-	int err = 0, lnum, offs, total_read;
+	int err = 0, lnum, offs, bytes_left;
 	struct gluebi_device *gluebi;
 
 	gluebi = container_of(mtd, struct gluebi_device, mtd);
 	lnum = div_u64_rem(from, mtd->erasesize, &offs);
-	total_read = len;
-	while (total_read) {
+	bytes_left = len;
+	while (bytes_left) {
 		size_t to_read = mtd->erasesize - offs;
 
-		if (to_read > total_read)
-			to_read = total_read;
+		if (to_read > bytes_left)
+			to_read = bytes_left;
 
 		err = ubi_read(gluebi->desc, lnum, buf, offs, to_read);
 		if (err)
···
 
 		lnum += 1;
 		offs = 0;
-		total_read -= to_read;
+		bytes_left -= to_read;
 		buf += to_read;
 	}
 
-	*retlen = len - total_read;
+	*retlen = len - bytes_left;
 	return err;
 }
 
···
 static int gluebi_write(struct mtd_info *mtd, loff_t to, size_t len,
 			size_t *retlen, const u_char *buf)
 {
-	int err = 0, lnum, offs, total_written;
+	int err = 0, lnum, offs, bytes_left;
 	struct gluebi_device *gluebi;
 
 	gluebi = container_of(mtd, struct gluebi_device, mtd);
···
 	if (len % mtd->writesize || offs % mtd->writesize)
 		return -EINVAL;
 
-	total_written = len;
-	while (total_written) {
+	bytes_left = len;
+	while (bytes_left) {
 		size_t to_write = mtd->erasesize - offs;
 
-		if (to_write > total_written)
-			to_write = total_written;
+		if (to_write > bytes_left)
+			to_write = bytes_left;
 
 		err = ubi_leb_write(gluebi->desc, lnum, buf, offs, to_write);
 		if (err)
···
 
 		lnum += 1;
 		offs = 0;
-		total_written -= to_write;
+		bytes_left -= to_write;
 		buf += to_write;
 	}
 
-	*retlen = len - total_written;
+	*retlen = len - bytes_left;
 	return err;
 }