diff options
Diffstat (limited to 'target/linux/brcm63xx/patches-4.4/000-4.8-07-mtd-spi-nor-stop-passing-around-retlen.patch')
-rw-r--r-- | target/linux/brcm63xx/patches-4.4/000-4.8-07-mtd-spi-nor-stop-passing-around-retlen.patch | 266 |
1 files changed, 266 insertions, 0 deletions
diff --git a/target/linux/brcm63xx/patches-4.4/000-4.8-07-mtd-spi-nor-stop-passing-around-retlen.patch b/target/linux/brcm63xx/patches-4.4/000-4.8-07-mtd-spi-nor-stop-passing-around-retlen.patch new file mode 100644 index 0000000000..9949d35a6f --- /dev/null +++ b/target/linux/brcm63xx/patches-4.4/000-4.8-07-mtd-spi-nor-stop-passing-around-retlen.patch @@ -0,0 +1,266 @@ +From 2dd087b16946cf168f401526adf26afa771bb740 Mon Sep 17 00:00:00 2001 +From: Michal Suchanek <hramrach@gmail.com> +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 <hramrach@gmail.com> +Signed-off-by: Brian Norris <computersforpeace@gmail.com> +Tested-by Cyrille Pitchen <cyrille.pitchen@atmel.com> +Acked-by: Michal Suchanek <hramrach@gmail.com> +Tested-by: Michal Suchanek <hramrach@gmail.com> +--- + 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); |