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-rw-r--r--target/linux/layerscape/patches-4.4/1094-mtd-spi-nor-stop-passing-around-retlen.patch215
1 files changed, 215 insertions, 0 deletions
diff --git a/target/linux/layerscape/patches-4.4/1094-mtd-spi-nor-stop-passing-around-retlen.patch b/target/linux/layerscape/patches-4.4/1094-mtd-spi-nor-stop-passing-around-retlen.patch
new file mode 100644
index 0000000000..6223dfc190
--- /dev/null
+++ b/target/linux/layerscape/patches-4.4/1094-mtd-spi-nor-stop-passing-around-retlen.patch
@@ -0,0 +1,215 @@
+From a99477d72b500b48cb3614aad0ce096fe4e3f437 Mon Sep 17 00:00:00 2001
+From: Michal Suchanek <hramrach@gmail.com>
+Date: Wed, 2 Dec 2015 10:38:20 +0000
+Subject: [PATCH 094/113] mtd: spi-nor: stop passing around retlen
+
+[context adjustment]
+not apply changes of drivers/mtd/devices/m25p80.c
+#################
+@@ -74,7 +74,7 @@ static int m25p80_write_reg(struct spi_nor *nor, u8 opcode, u8 *buf, int len)
+ }
+
+ 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_nor *nor, loff_t to, size_t len,
+ 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_nbits(struct spi_nor *nor)
+ * 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;
+@@ -161,7 +160,6 @@ static ssize_t m25p80_read(struct spi_nor *nor, loff_t from, size_t len,
+ ret = m.actual_length - m25p_cmdsz(nor) - dummy;
+ if (ret < 0)
+ return -EIO;
+- *retlen += ret;
+ return ret;
+ }
+
+#################
+
+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: Hou Zhiqiang <Zhiqiang.Hou@freescale.com>
+Integrated-by: Jiang Yutang <yutang.jiang@nxp.com>
+---
+ drivers/mtd/spi-nor/fsl-quadspi.c | 16 ++++++----------
+ drivers/mtd/spi-nor/spi-nor.c | 21 +++++++++++++--------
+ include/linux/mtd/spi-nor.h | 4 ++--
+ 3 files changed, 21 insertions(+), 20 deletions(-)
+
+--- a/drivers/mtd/spi-nor/fsl-quadspi.c
++++ b/drivers/mtd/spi-nor/fsl-quadspi.c
+@@ -620,7 +620,7 @@ 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;
+@@ -647,11 +647,8 @@ 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;
+ }
+@@ -862,7 +859,7 @@ 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 {
+@@ -874,12 +871,11 @@ 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);
+@@ -887,7 +883,7 @@ 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;
+--- a/drivers/mtd/spi-nor/spi-nor.c
++++ b/drivers/mtd/spi-nor/spi-nor.c
+@@ -919,12 +919,13 @@ 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;
+ }
+
+@@ -951,7 +952,7 @@ 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",
+@@ -967,7 +968,7 @@ 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",
+@@ -990,7 +991,7 @@ 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",
+@@ -999,8 +1000,10 @@ 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;
+ }
+@@ -1029,15 +1032,17 @@ 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; ) {
+@@ -1051,10 +1056,10 @@ 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
+@@ -171,9 +171,9 @@ 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);
generated by cgit v1.2.3 (git 2.25.1) at 2024-07-06 16:06:34 +0000