From dc4e09656adc02de5af848fae5d20bd51db9fec2 Mon Sep 17 00:00:00 2001 From: Felix Fietkau Date: Mon, 14 Sep 2015 06:57:07 +0000 Subject: [PATCH] ramips: fix chunked-io support for big flash chips (#20504) Signed-off-by: Felix Fietkau Backport of r46904 git-svn-id: svn://svn.openwrt.org/openwrt/branches/chaos_calmer@46905 3c298f89-4303-0410-b956-a3cf2f4a3e73 --- .../0044-mtd-add-chunked-read-io-to-m25p80.patch | 9 ++++++--- 1 file changed, 6 insertions(+), 3 deletions(-) diff --git a/target/linux/ramips/patches-3.18/0044-mtd-add-chunked-read-io-to-m25p80.patch b/target/linux/ramips/patches-3.18/0044-mtd-add-chunked-read-io-to-m25p80.patch index 2bffa1f696..1716e1cc49 100644 --- a/target/linux/ramips/patches-3.18/0044-mtd-add-chunked-read-io-to-m25p80.patch +++ b/target/linux/ramips/patches-3.18/0044-mtd-add-chunked-read-io-to-m25p80.patch @@ -16,7 +16,7 @@ u8 command[MAX_CMD_SIZE]; }; -@@ -157,6 +159,58 @@ static int m25p80_read(struct spi_nor *n +@@ -157,6 +159,61 @@ static int m25p80_read(struct spi_nor *n return 0; } @@ -31,6 +31,9 @@ + if (!chunk_size) + chunk_size = _len; + ++ if (nor->addr_width > 3) ++ chunk_size -= nor->addr_width - 3; ++ + while (retlen < _len) { + size_t len = min_t(int, chunk_size, _len - retlen); + const u_char *buf = _buf + retlen; @@ -75,7 +78,7 @@ static int m25p80_erase(struct spi_nor *nor, loff_t offset) { struct m25p *flash = nor->priv; -@@ -197,6 +251,7 @@ static int m25p_probe(struct spi_device +@@ -197,6 +254,7 @@ static int m25p_probe(struct spi_device struct spi_nor *nor; enum read_mode mode = SPI_NOR_NORMAL; char *flash_name = NULL; @@ -83,7 +86,7 @@ int ret; data = dev_get_platdata(&spi->dev); -@@ -244,6 +299,14 @@ static int m25p_probe(struct spi_device +@@ -244,6 +302,14 @@ static int m25p_probe(struct spi_device if (ret) return ret;