mtd: nand: fsmc: create and use mtd_to_fsmc()

Create and use mtd_to_fsmc() to avoid duplication of
container_of(mtd, struct fsmc_nand_data, mtd) calls.
Signed-off-by: Boris Brezillon <boris.brezillon@free-electrons.com>
Signed-off-by: Brian Norris <computersforpeace@gmail.com>

drivers/mtd/nand/fsmc_nand.c

@@ -326,13 +326,18 @@ struct fsmc_nand_data {
 	void			(*select_chip)(uint32_t bank, uint32_t busw);
 };
 
+static inline struct fsmc_nand_data *mtd_to_fsmc(struct mtd_info *mtd)
+{
+	return container_of(mtd, struct fsmc_nand_data, mtd);
+}
+
 /* Assert CS signal based on chipnr */
 static void fsmc_select_chip(struct mtd_info *mtd, int chipnr)
 {
 	struct nand_chip *chip = mtd_to_nand(mtd);
 	struct fsmc_nand_data *host;
 
-	host = container_of(mtd, struct fsmc_nand_data, mtd);
+	host = mtd_to_fsmc(mtd);
 
 	switch (chipnr) {
 	case -1:
@@ -359,8 +364,7 @@ static void fsmc_select_chip(struct mtd_info *mtd, int chipnr)
 static void fsmc_cmd_ctrl(struct mtd_info *mtd, int cmd, unsigned int ctrl)
 {
 	struct nand_chip *this = mtd_to_nand(mtd);
-	struct fsmc_nand_data *host = container_of(mtd,
-					struct fsmc_nand_data, mtd);
+	struct fsmc_nand_data *host = mtd_to_fsmc(mtd);
 	void __iomem *regs = host->regs_va;
 	unsigned int bank = host->bank;
 
@@ -445,8 +449,7 @@ static void fsmc_nand_setup(void __iomem *regs, uint32_t bank,
  */
 static void fsmc_enable_hwecc(struct mtd_info *mtd, int mode)
 {
-	struct fsmc_nand_data *host = container_of(mtd,
-					struct fsmc_nand_data, mtd);
+	struct fsmc_nand_data *host = mtd_to_fsmc(mtd);
 	void __iomem *regs = host->regs_va;
 	uint32_t bank = host->bank;
 
@@ -466,8 +469,7 @@ static void fsmc_enable_hwecc(struct mtd_info *mtd, int mode)
 static int fsmc_read_hwecc_ecc4(struct mtd_info *mtd, const uint8_t *data,
 				uint8_t *ecc)
 {
-	struct fsmc_nand_data *host = container_of(mtd,
-					struct fsmc_nand_data, mtd);
+	struct fsmc_nand_data *host = mtd_to_fsmc(mtd);
 	void __iomem *regs = host->regs_va;
 	uint32_t bank = host->bank;
 	uint32_t ecc_tmp;
@@ -517,8 +519,7 @@ static int fsmc_read_hwecc_ecc4(struct mtd_info *mtd, const uint8_t *data,
 static int fsmc_read_hwecc_ecc1(struct mtd_info *mtd, const uint8_t *data,
 				uint8_t *ecc)
 {
-	struct fsmc_nand_data *host = container_of(mtd,
-					struct fsmc_nand_data, mtd);
+	struct fsmc_nand_data *host = mtd_to_fsmc(mtd);
 	void __iomem *regs = host->regs_va;
 	uint32_t bank = host->bank;
 	uint32_t ecc_tmp;
@@ -674,9 +675,8 @@ static void fsmc_read_buf(struct mtd_info *mtd, uint8_t *buf, int len)
  */
 static void fsmc_read_buf_dma(struct mtd_info *mtd, uint8_t *buf, int len)
 {
-	struct fsmc_nand_data *host;
+	struct fsmc_nand_data *host  = mtd_to_fsmc(mtd);
 
-	host = container_of(mtd, struct fsmc_nand_data, mtd);
 	dma_xfer(host, buf, len, DMA_FROM_DEVICE);
 }
 
@@ -689,9 +689,8 @@ static void fsmc_read_buf_dma(struct mtd_info *mtd, uint8_t *buf, int len)
 static void fsmc_write_buf_dma(struct mtd_info *mtd, const uint8_t *buf,
 		int len)
 {
-	struct fsmc_nand_data *host;
+	struct fsmc_nand_data *host = mtd_to_fsmc(mtd);
 
-	host = container_of(mtd, struct fsmc_nand_data, mtd);
 	dma_xfer(host, (void *)buf, len, DMA_TO_DEVICE);
 }
 
@@ -712,8 +711,7 @@ static void fsmc_write_buf_dma(struct mtd_info *mtd, const uint8_t *buf,
 static int fsmc_read_page_hwecc(struct mtd_info *mtd, struct nand_chip *chip,
 				 uint8_t *buf, int oob_required, int page)
 {
-	struct fsmc_nand_data *host = container_of(mtd,
-					struct fsmc_nand_data, mtd);
+	struct fsmc_nand_data *host = mtd_to_fsmc(mtd);
 	struct fsmc_eccplace *ecc_place = host->ecc_place;
 	int i, j, s, stat, eccsize = chip->ecc.size;
 	int eccbytes = chip->ecc.bytes;
@@ -782,9 +780,8 @@ static int fsmc_read_page_hwecc(struct mtd_info *mtd, struct nand_chip *chip,
 static int fsmc_bch8_correct_data(struct mtd_info *mtd, uint8_t *dat,
 			     uint8_t *read_ecc, uint8_t *calc_ecc)
 {
-	struct fsmc_nand_data *host = container_of(mtd,
-					struct fsmc_nand_data, mtd);
 	struct nand_chip *chip = mtd_to_nand(mtd);
+	struct fsmc_nand_data *host = mtd_to_fsmc(mtd);
 	void __iomem *regs = host->regs_va;
 	unsigned int bank = host->bank;
 	uint32_t err_idx[8];