diff options
Diffstat (limited to 'target/linux/bcm53xx/patches-4.9/401-mtd-m25p80-use-single-SPI-message-for-writing-data.patch')
| -rw-r--r-- | target/linux/bcm53xx/patches-4.9/401-mtd-m25p80-use-single-SPI-message-for-writing-data.patch | 68 |
1 files changed, 0 insertions, 68 deletions
diff --git a/target/linux/bcm53xx/patches-4.9/401-mtd-m25p80-use-single-SPI-message-for-writing-data.patch b/target/linux/bcm53xx/patches-4.9/401-mtd-m25p80-use-single-SPI-message-for-writing-data.patch deleted file mode 100644 index 80c0e7877e..0000000000 --- a/target/linux/bcm53xx/patches-4.9/401-mtd-m25p80-use-single-SPI-message-for-writing-data.patch +++ /dev/null @@ -1,68 +0,0 @@ -From: =?UTF-8?q?Rafa=C5=82=20Mi=C5=82ecki?= <zajec5@gmail.com> -Subject: [PATCH] mtd: m25p80: use single SPI message for writing data -MIME-Version: 1.0 -Content-Type: text/plain; charset=UTF-8 -Content-Transfer-Encoding: 8bit - -On all 3 tested Northstar devices with following flash memories: -mx25l6405d (8192 Kbytes) -mx25l12805d (16384 Kbytes) -mx25l25635e (32768 Kbytes) -I noticed writing to be broken. Not a single bit was changed leaving all -bytes set to 0xff. - -This is most likely some problem related to the SPI controller or its -driver. Using a single SPI message seems to workaround this. Of course -it's not perfect solution as copying whole data into a new buffer makes -writing slower. - -Signed-off-by: Rafał Miłecki <zajec5@gmail.com> ---- - ---- a/drivers/mtd/devices/m25p80.c -+++ b/drivers/mtd/devices/m25p80.c -@@ -78,6 +78,7 @@ static ssize_t m25p80_write(struct spi_n - { - struct m25p *flash = nor->priv; - struct spi_device *spi = flash->spi; -+ u8 *command = kzalloc(MAX_CMD_SIZE + len, GFP_KERNEL); - struct spi_transfer t[2] = {}; - struct spi_message m; - int cmd_sz = m25p_cmdsz(nor); -@@ -88,24 +89,26 @@ static ssize_t m25p80_write(struct spi_n - if (nor->program_opcode == SPINOR_OP_AAI_WP && nor->sst_write_second) - cmd_sz = 1; - -- flash->command[0] = nor->program_opcode; -- m25p_addr2cmd(nor, to, flash->command); -+ command[0] = nor->program_opcode; -+ m25p_addr2cmd(nor, to, command); -+ memcpy(&command[cmd_sz], buf, len); - -- t[0].tx_buf = flash->command; -- t[0].len = cmd_sz; -+ t[0].tx_buf = command; -+ t[0].len = cmd_sz + len; - spi_message_add_tail(&t[0], &m); - -- t[1].tx_buf = buf; -- t[1].len = len; -- spi_message_add_tail(&t[1], &m); -- - ret = spi_sync(spi, &m); -- if (ret) -+ if (ret) { -+ kfree(command); - return ret; -+ } - - ret = m.actual_length - cmd_sz; -- if (ret < 0) -+ if (ret < 0) { -+ kfree(command); - return -EIO; -+ } -+ kfree(command); - return ret; - } - |