From 2dd087b16946cf168f401526adf26afa771bb740 Mon Sep 17 00:00:00 2001 From: Michal Suchanek Date: Thu, 5 May 2016 17:31:53 -0700 Subject: [PATCH 07/10] mtd: spi-nor: stop passing around retlen Do not pass retlen to hardware driver read/write functions. Update it in spi-nor generic driver instead. Signed-off-by: Michal Suchanek Signed-off-by: Brian Norris Tested-by Cyrille Pitchen Acked-by: Michal Suchanek Tested-by: Michal Suchanek --- drivers/mtd/devices/m25p80.c | 7 ++----- drivers/mtd/spi-nor/fsl-quadspi.c | 17 ++++++----------- drivers/mtd/spi-nor/nxp-spifi.c | 6 ++---- drivers/mtd/spi-nor/spi-nor.c | 21 +++++++++++++-------- include/linux/mtd/spi-nor.h | 4 ++-- 6 files changed, 28 insertions(+), 35 deletions(-) --- a/drivers/mtd/devices/m25p80.c +++ b/drivers/mtd/devices/m25p80.c @@ -74,7 +74,7 @@ static int m25p80_write_reg(struct spi_n } static ssize_t m25p80_write(struct spi_nor *nor, loff_t to, size_t len, - size_t *retlen, const u_char *buf) + const u_char *buf) { struct m25p *flash = nor->priv; struct spi_device *spi = flash->spi; @@ -106,7 +106,6 @@ static ssize_t m25p80_write(struct spi_n ret = m.actual_length - cmd_sz; if (ret < 0) return -EIO; - *retlen += ret; return ret; } @@ -127,7 +126,7 @@ static inline unsigned int m25p80_rx_nbi * may be any size provided it is within the physical boundaries. */ static ssize_t m25p80_read(struct spi_nor *nor, loff_t from, size_t len, - size_t *retlen, u_char *buf) + u_char *buf) { struct m25p *flash = nor->priv; struct spi_device *spi = flash->spi; @@ -156,7 +155,6 @@ static ssize_t m25p80_read(struct spi_no msg.data_nbits = m25p80_rx_nbits(nor); ret = spi_flash_read(spi, &msg); - *retlen = msg.retlen; if (ret < 0) return ret; return msg.retlen; @@ -184,7 +182,6 @@ static ssize_t m25p80_read(struct spi_no ret = m.actual_length - m25p_cmdsz(nor) - dummy; if (ret < 0) return -EIO; - *retlen += ret; return ret; } --- a/drivers/mtd/spi-nor/fsl-quadspi.c +++ b/drivers/mtd/spi-nor/fsl-quadspi.c @@ -577,7 +577,7 @@ static inline void fsl_qspi_invalid(stru static ssize_t fsl_qspi_nor_write(struct fsl_qspi *q, struct spi_nor *nor, u8 opcode, unsigned int to, u32 *txbuf, - unsigned count, size_t *retlen) + unsigned count) { int ret, i, j; u32 tmp; @@ -604,11 +604,8 @@ static ssize_t fsl_qspi_nor_write(struct /* Trigger it */ ret = fsl_qspi_runcmd(q, opcode, to, count); - if (ret == 0) { - if (retlen) - *retlen += count; + if (ret == 0) return count; - } return ret; } @@ -816,7 +813,7 @@ static int fsl_qspi_write_reg(struct spi } else if (len > 0) { ret = fsl_qspi_nor_write(q, nor, opcode, 0, - (u32 *)buf, len, NULL); + (u32 *)buf, len); if (ret > 0) return 0; } else { @@ -828,12 +825,11 @@ static int fsl_qspi_write_reg(struct spi } static ssize_t fsl_qspi_write(struct spi_nor *nor, loff_t to, - size_t len, size_t *retlen, const u_char *buf) + size_t len, const u_char *buf) { struct fsl_qspi *q = nor->priv; - ssize_t ret = fsl_qspi_nor_write(q, nor, nor->program_opcode, to, - (u32 *)buf, len, retlen); + (u32 *)buf, len); /* invalid the data in the AHB buffer. */ fsl_qspi_invalid(q); @@ -841,7 +837,7 @@ static ssize_t fsl_qspi_write(struct spi } static ssize_t fsl_qspi_read(struct spi_nor *nor, loff_t from, - size_t len, size_t *retlen, u_char *buf) + size_t len, u_char *buf) { struct fsl_qspi *q = nor->priv; u8 cmd = nor->read_opcode; @@ -883,7 +879,6 @@ static ssize_t fsl_qspi_read(struct spi_ memcpy(buf, q->ahb_addr + q->chip_base_addr + from - q->memmap_offs, len); - *retlen += len; return len; } --- a/drivers/mtd/spi-nor/nxp-spifi.c +++ b/drivers/mtd/spi-nor/nxp-spifi.c @@ -173,7 +173,7 @@ static int nxp_spifi_write_reg(struct sp } static ssize_t nxp_spifi_read(struct spi_nor *nor, loff_t from, size_t len, - size_t *retlen, u_char *buf) + u_char *buf) { struct nxp_spifi *spifi = nor->priv; int ret; @@ -183,13 +183,12 @@ static ssize_t nxp_spifi_read(struct spi return ret; memcpy_fromio(buf, spifi->flash_base + from, len); - *retlen += len; return len; } static ssize_t nxp_spifi_write(struct spi_nor *nor, loff_t to, size_t len, - size_t *retlen, const u_char *buf) + const u_char *buf) { struct nxp_spifi *spifi = nor->priv; u32 cmd; @@ -201,7 +200,6 @@ static ssize_t nxp_spifi_write(struct sp return ret; writel(to, spifi->io_base + SPIFI_ADDR); - *retlen += len; cmd = SPIFI_CMD_DOUT | SPIFI_CMD_DATALEN(len) | --- a/drivers/mtd/spi-nor/spi-nor.c +++ b/drivers/mtd/spi-nor/spi-nor.c @@ -890,12 +890,13 @@ static int spi_nor_read(struct mtd_info if (ret) return ret; - ret = nor->read(nor, from, len, retlen, buf); + ret = nor->read(nor, from, len, buf); spi_nor_unlock_and_unprep(nor, SPI_NOR_OPS_READ); if (ret < 0) return ret; + *retlen += ret; return 0; } @@ -922,7 +923,7 @@ static int sst_write(struct mtd_info *mt nor->program_opcode = SPINOR_OP_BP; /* write one byte. */ - ret = nor->write(nor, to, 1, retlen, buf); + ret = nor->write(nor, to, 1, buf); if (ret < 0) goto sst_write_err; WARN(ret != 1, "While writing 1 byte written %i bytes\n", @@ -938,7 +939,7 @@ static int sst_write(struct mtd_info *mt nor->program_opcode = SPINOR_OP_AAI_WP; /* write two bytes. */ - ret = nor->write(nor, to, 2, retlen, buf + actual); + ret = nor->write(nor, to, 2, buf + actual); if (ret < 0) goto sst_write_err; WARN(ret != 2, "While writing 2 bytes written %i bytes\n", @@ -961,7 +962,7 @@ static int sst_write(struct mtd_info *mt write_enable(nor); nor->program_opcode = SPINOR_OP_BP; - ret = nor->write(nor, to, 1, retlen, buf + actual); + ret = nor->write(nor, to, 1, buf + actual); if (ret < 0) goto sst_write_err; WARN(ret != 1, "While writing 1 byte written %i bytes\n", @@ -970,8 +971,10 @@ static int sst_write(struct mtd_info *mt if (ret) goto sst_write_err; write_disable(nor); + actual += 1; } sst_write_err: + *retlen += actual; spi_nor_unlock_and_unprep(nor, SPI_NOR_OPS_WRITE); return ret; } @@ -1000,15 +1003,17 @@ static int spi_nor_write(struct mtd_info /* do all the bytes fit onto one page? */ if (page_offset + len <= nor->page_size) { - ret = nor->write(nor, to, len, retlen, buf); + ret = nor->write(nor, to, len, buf); if (ret < 0) goto write_err; + *retlen += ret; } else { /* the size of data remaining on the first page */ page_size = nor->page_size - page_offset; - ret = nor->write(nor, to, page_size, retlen, buf); + ret = nor->write(nor, to, page_size, buf); if (ret < 0) goto write_err; + *retlen += ret; /* write everything in nor->page_size chunks */ for (i = ret; i < len; ) { @@ -1022,10 +1027,10 @@ static int spi_nor_write(struct mtd_info write_enable(nor); - ret = nor->write(nor, to + i, page_size, retlen, - buf + i); + ret = nor->write(nor, to + i, page_size, buf + i); if (ret < 0) goto write_err; + *retlen += ret; i += ret; } } --- a/include/linux/mtd/spi-nor.h +++ b/include/linux/mtd/spi-nor.h @@ -170,9 +170,9 @@ struct spi_nor { int (*write_reg)(struct spi_nor *nor, u8 opcode, u8 *buf, int len); ssize_t (*read)(struct spi_nor *nor, loff_t from, - size_t len, size_t *retlen, u_char *read_buf); + size_t len, u_char *read_buf); ssize_t (*write)(struct spi_nor *nor, loff_t to, - size_t len, size_t *retlen, const u_char *write_buf); + size_t len, const u_char *write_buf); int (*erase)(struct spi_nor *nor, loff_t offs); int (*flash_lock)(struct spi_nor *nor, loff_t ofs, uint64_t len);