diff options
Diffstat (limited to 'target/linux/brcm63xx/patches-4.4/000-4.8-02-mtd-m25p80-return-amount-of-data-transferred-or-erro.patch')
| -rw-r--r-- | target/linux/brcm63xx/patches-4.4/000-4.8-02-mtd-m25p80-return-amount-of-data-transferred-or-erro.patch | 91 |
1 files changed, 91 insertions, 0 deletions
diff --git a/target/linux/brcm63xx/patches-4.4/000-4.8-02-mtd-m25p80-return-amount-of-data-transferred-or-erro.patch b/target/linux/brcm63xx/patches-4.4/000-4.8-02-mtd-m25p80-return-amount-of-data-transferred-or-erro.patch new file mode 100644 index 0000000000..fb89b77072 --- /dev/null +++ b/target/linux/brcm63xx/patches-4.4/000-4.8-02-mtd-m25p80-return-amount-of-data-transferred-or-erro.patch @@ -0,0 +1,91 @@ +From 1992297b0810a42d78ec7b4de15304eb0489fd97 Mon Sep 17 00:00:00 2001 +From: Michal Suchanek <hramrach@gmail.com> +Date: Thu, 5 May 2016 17:31:48 -0700 +Subject: [PATCH 02/10] mtd: m25p80: return amount of data transferred or error + in read/write + +Add checking of SPI transfer errors and return them from read/write +functions. Also return the amount of data transferred. + +Signed-off-by: Michal Suchanek <hramrach@gmail.com> +Signed-off-by: Brian Norris <computersforpeace@gmail.com> +Acked-by: Michal Suchanek <hramrach@gmail.com> +Tested-by: Michal Suchanek <hramrach@gmail.com> +--- + drivers/mtd/devices/m25p80.c | 29 +++++++++++++++++++++-------- + 1 file changed, 21 insertions(+), 8 deletions(-) + +--- a/drivers/mtd/devices/m25p80.c ++++ b/drivers/mtd/devices/m25p80.c +@@ -81,6 +81,7 @@ static ssize_t m25p80_write(struct spi_n + struct spi_transfer t[2] = {}; + struct spi_message m; + int cmd_sz = m25p_cmdsz(nor); ++ ssize_t ret; + + spi_message_init(&m); + +@@ -98,10 +99,15 @@ static ssize_t m25p80_write(struct spi_n + t[1].len = len; + spi_message_add_tail(&t[1], &m); + +- spi_sync(spi, &m); ++ ret = spi_sync(spi, &m); ++ if (ret) ++ return ret; + +- *retlen += m.actual_length - cmd_sz; +- return 0; ++ ret = m.actual_length - cmd_sz; ++ if (ret < 0) ++ return -EIO; ++ *retlen += ret; ++ return ret; + } + + static inline unsigned int m25p80_rx_nbits(struct spi_nor *nor) +@@ -128,13 +134,13 @@ static ssize_t m25p80_read(struct spi_no + struct spi_transfer t[2]; + struct spi_message m; + unsigned int dummy = nor->read_dummy; ++ ssize_t ret; + + /* convert the dummy cycles to the number of bytes */ + dummy /= 8; + + if (spi_flash_read_supported(spi)) { + struct spi_flash_read_message msg; +- int ret; + + memset(&msg, 0, sizeof(msg)); + +@@ -151,7 +157,9 @@ static ssize_t m25p80_read(struct spi_no + + ret = spi_flash_read(spi, &msg); + *retlen = msg.retlen; +- return ret; ++ if (ret < 0) ++ return ret; ++ return msg.retlen; + } + + spi_message_init(&m); +@@ -169,10 +177,15 @@ static ssize_t m25p80_read(struct spi_no + t[1].len = len; + spi_message_add_tail(&t[1], &m); + +- spi_sync(spi, &m); ++ ret = spi_sync(spi, &m); ++ if (ret) ++ return ret; + +- *retlen = m.actual_length - m25p_cmdsz(nor) - dummy; +- return 0; ++ ret = m.actual_length - m25p_cmdsz(nor) - dummy; ++ if (ret < 0) ++ return -EIO; ++ *retlen += ret; ++ return ret; + } + + static int m25p80_erase(struct spi_nor *nor, loff_t offset) |