mtd: nand: denali: rename misleading dma_buf to tmp_buf

The "dma_buf" is not used for a DMA bounce buffer, but for arranging
the transferred data for the syndrome page layout.  In fact, it is
used in the PIO mode as well, so "dma_buf" is a misleading name.
Rename it to "tmp_buf".
Signed-off-by: Masahiro Yamada <yamada.masahiro@socionext.com>
Signed-off-by: Boris Brezillon <boris.brezillon@free-electrons.com>

drivers/mtd/nand/denali.c

@@ -710,12 +710,12 @@ static int denali_read_page_raw(struct mtd_info *mtd, struct nand_chip *chip,
 	int ecc_steps = chip->ecc.steps;
 	int ecc_size = chip->ecc.size;
 	int ecc_bytes = chip->ecc.bytes;
-	void *dma_buf = denali->buf;
+	void *tmp_buf = denali->buf;
 	int oob_skip = denali->oob_skip_bytes;
 	size_t size = writesize + oobsize;
 	int ret, i, pos, len;
 
-	ret = denali_data_xfer(denali, dma_buf, size, page, 1, 0);
+	ret = denali_data_xfer(denali, tmp_buf, size, page, 1, 0);
 	if (ret)
 		return ret;
 
@@ -730,11 +730,11 @@ static int denali_read_page_raw(struct mtd_info *mtd, struct nand_chip *chip,
 			else if (pos + len > writesize)
 				len = writesize - pos;
 
-			memcpy(buf, dma_buf + pos, len);
+			memcpy(buf, tmp_buf + pos, len);
 			buf += len;
 			if (len < ecc_size) {
 				len = ecc_size - len;
-				memcpy(buf, dma_buf + writesize + oob_skip,
+				memcpy(buf, tmp_buf + writesize + oob_skip,
 				       len);
 				buf += len;
 			}
@@ -745,7 +745,7 @@ static int denali_read_page_raw(struct mtd_info *mtd, struct nand_chip *chip,
 		uint8_t *oob = chip->oob_poi;
 
 		/* BBM at the beginning of the OOB area */
-		memcpy(oob, dma_buf + writesize, oob_skip);
+		memcpy(oob, tmp_buf + writesize, oob_skip);
 		oob += oob_skip;
 
 		/* OOB ECC */
@@ -758,11 +758,11 @@ static int denali_read_page_raw(struct mtd_info *mtd, struct nand_chip *chip,
 			else if (pos + len > writesize)
 				len = writesize - pos;
 
-			memcpy(oob, dma_buf + pos, len);
+			memcpy(oob, tmp_buf + pos, len);
 			oob += len;
 			if (len < ecc_bytes) {
 				len = ecc_bytes - len;
-				memcpy(oob, dma_buf + writesize + oob_skip,
+				memcpy(oob, tmp_buf + writesize + oob_skip,
 				       len);
 				oob += len;
 			}
@@ -770,7 +770,7 @@ static int denali_read_page_raw(struct mtd_info *mtd, struct nand_chip *chip,
 
 		/* OOB free */
 		len = oobsize - (oob - chip->oob_poi);
-		memcpy(oob, dma_buf + size - len, len);
+		memcpy(oob, tmp_buf + size - len, len);
 	}
 
 	return 0;
@@ -841,7 +841,7 @@ static int denali_write_page_raw(struct mtd_info *mtd, struct nand_chip *chip,
 	int ecc_steps = chip->ecc.steps;
 	int ecc_size = chip->ecc.size;
 	int ecc_bytes = chip->ecc.bytes;
-	void *dma_buf = denali->buf;
+	void *tmp_buf = denali->buf;
 	int oob_skip = denali->oob_skip_bytes;
 	size_t size = writesize + oobsize;
 	int i, pos, len;
@@ -851,7 +851,7 @@ static int denali_write_page_raw(struct mtd_info *mtd, struct nand_chip *chip,
 	 * This simplifies the logic.
 	 */
 	if (!buf || !oob_required)
-		memset(dma_buf, 0xff, size);
+		memset(tmp_buf, 0xff, size);
 
 	/* Arrange the buffer for syndrome payload/ecc layout */
 	if (buf) {
@@ -864,11 +864,11 @@ static int denali_write_page_raw(struct mtd_info *mtd, struct nand_chip *chip,
 			else if (pos + len > writesize)
 				len = writesize - pos;
 
-			memcpy(dma_buf + pos, buf, len);
+			memcpy(tmp_buf + pos, buf, len);
 			buf += len;
 			if (len < ecc_size) {
 				len = ecc_size - len;
-				memcpy(dma_buf + writesize + oob_skip, buf,
+				memcpy(tmp_buf + writesize + oob_skip, buf,
 				       len);
 				buf += len;
 			}
@@ -879,7 +879,7 @@ static int denali_write_page_raw(struct mtd_info *mtd, struct nand_chip *chip,
 		const uint8_t *oob = chip->oob_poi;
 
 		/* BBM at the beginning of the OOB area */
-		memcpy(dma_buf + writesize, oob, oob_skip);
+		memcpy(tmp_buf + writesize, oob, oob_skip);
 		oob += oob_skip;
 
 		/* OOB ECC */
@@ -892,11 +892,11 @@ static int denali_write_page_raw(struct mtd_info *mtd, struct nand_chip *chip,
 			else if (pos + len > writesize)
 				len = writesize - pos;
 
-			memcpy(dma_buf + pos, oob, len);
+			memcpy(tmp_buf + pos, oob, len);
 			oob += len;
 			if (len < ecc_bytes) {
 				len = ecc_bytes - len;
-				memcpy(dma_buf + writesize + oob_skip, oob,
+				memcpy(tmp_buf + writesize + oob_skip, oob,
 				       len);
 				oob += len;
 			}
@@ -904,10 +904,10 @@ static int denali_write_page_raw(struct mtd_info *mtd, struct nand_chip *chip,
 
 		/* OOB free */
 		len = oobsize - (oob - chip->oob_poi);
-		memcpy(dma_buf + size - len, oob, len);
+		memcpy(tmp_buf + size - len, oob, len);
 	}
 
-	return denali_data_xfer(denali, dma_buf, size, page, 1, 1);
+	return denali_data_xfer(denali, tmp_buf, size, page, 1, 1);
 }
 
 static int denali_write_page(struct mtd_info *mtd, struct nand_chip *chip,