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author | Gabor Juhos <juhosg@openwrt.org> | 2011-12-13 20:41:22 +0000 |
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committer | Gabor Juhos <juhosg@openwrt.org> | 2011-12-13 20:41:22 +0000 |
commit | 5afedc67e2fa7ad440516a64534acc28f3a61500 (patch) | |
tree | d81525cfd46a61ef1c060ac15c317cfd64c1a7dc | |
parent | 470b1f471a745eab6765fdf1edea3e882d682f9e (diff) | |
download | mtk-20170518-5afedc67e2fa7ad440516a64534acc28f3a61500.zip mtk-20170518-5afedc67e2fa7ad440516a64534acc28f3a61500.tar.gz mtk-20170518-5afedc67e2fa7ad440516a64534acc28f3a61500.tar.bz2 |
generic: disable 'small sector' erase in m25p80 driver
This fixes the issues with the jffs2 images on various boards. Using
JFFS2 on devices with 4KiB erase sectors is not safe:
http://lists.infradead.org/pipermail/linux-mtd/2011-June/036591.html
SVN-Revision: 29521
6 files changed, 126 insertions, 0 deletions
diff --git a/target/linux/generic/config-2.6.39 b/target/linux/generic/config-2.6.39 index fd6c5cd..b6bbc5a 100644 --- a/target/linux/generic/config-2.6.39 +++ b/target/linux/generic/config-2.6.39 @@ -1288,6 +1288,7 @@ CONFIG_LOG_BUF_SHIFT=14 # CONFIG_LXT_PHY is not set CONFIG_LZMA_COMPRESS=y CONFIG_LZMA_DECOMPRESS=y +# CONFIG_M25PXX_PREFER_SMALL_SECTOR_ERASE is not set # CONFIG_MAC80211 is not set # CONFIG_MACH_DECSTATION is not set # CONFIG_MACH_JAZZ is not set diff --git a/target/linux/generic/config-3.0 b/target/linux/generic/config-3.0 index bc31d94..ac04ad7 100644 --- a/target/linux/generic/config-3.0 +++ b/target/linux/generic/config-3.0 @@ -1278,6 +1278,7 @@ CONFIG_LOG_BUF_SHIFT=14 # CONFIG_LXT_PHY is not set CONFIG_LZMA_COMPRESS=y CONFIG_LZMA_DECOMPRESS=y +# CONFIG_M25PXX_PREFER_SMALL_SECTOR_ERASE is not set # CONFIG_MAC80211 is not set # CONFIG_MACH_DECSTATION is not set # CONFIG_MACH_JAZZ is not set diff --git a/target/linux/generic/config-3.1 b/target/linux/generic/config-3.1 index 2a0440c..64890b5 100644 --- a/target/linux/generic/config-3.1 +++ b/target/linux/generic/config-3.1 @@ -1291,6 +1291,7 @@ CONFIG_LOG_BUF_SHIFT=14 # CONFIG_LXT_PHY is not set CONFIG_LZMA_COMPRESS=y CONFIG_LZMA_DECOMPRESS=y +# CONFIG_M25PXX_PREFER_SMALL_SECTOR_ERASE is not set # CONFIG_MAC80211 is not set # CONFIG_MACH_DECSTATION is not set # CONFIG_MACH_JAZZ is not set diff --git a/target/linux/generic/patches-2.6.39/475-mtd-m25p80-allow-to-disable-small-sector-erase.patch b/target/linux/generic/patches-2.6.39/475-mtd-m25p80-allow-to-disable-small-sector-erase.patch new file mode 100644 index 0000000..484a24a --- /dev/null +++ b/target/linux/generic/patches-2.6.39/475-mtd-m25p80-allow-to-disable-small-sector-erase.patch @@ -0,0 +1,41 @@ +--- a/drivers/mtd/devices/Kconfig ++++ b/drivers/mtd/devices/Kconfig +@@ -102,6 +102,14 @@ config M25PXX_USE_FAST_READ + help + This option enables FAST_READ access supported by ST M25Pxx. + ++config M25PXX_PREFER_SMALL_SECTOR_ERASE ++ bool "Prefer small sector erase" ++ depends on MTD_M25P80 ++ default y ++ help ++ This option enables use of the small erase sectors if that is ++ supported by the flash chip. ++ + config MTD_SST25L + tristate "Support SST25L (non JEDEC) SPI Flash chips" + depends on SPI_MASTER +--- a/drivers/mtd/devices/m25p80.c ++++ b/drivers/mtd/devices/m25p80.c +@@ -77,6 +77,12 @@ + #define FAST_READ_DUMMY_BYTE 0 + #endif + ++#ifdef CONFIG_M25PXX_PREFER_SMALL_SECTOR_ERASE ++#define PREFER_SMALL_SECTOR_ERASE 1 ++#else ++#define PREFER_SMALL_SECTOR_ERASE 0 ++#endif ++ + /****************************************************************************/ + + struct m25p { +@@ -902,7 +908,7 @@ static int __devinit m25p_probe(struct s + flash->mtd.write = m25p80_write; + + /* prefer "small sector" erase if possible */ +- if (info->flags & SECT_4K) { ++ if (PREFER_SMALL_SECTOR_ERASE && (info->flags & SECT_4K)) { + flash->erase_opcode = OPCODE_BE_4K; + flash->mtd.erasesize = 4096; + } else if (info->flags & SECT_4K_PMC) { diff --git a/target/linux/generic/patches-3.0/476-mtd-m25p80-allow-to-disable-small-sector-erase.patch b/target/linux/generic/patches-3.0/476-mtd-m25p80-allow-to-disable-small-sector-erase.patch new file mode 100644 index 0000000..cc78d91 --- /dev/null +++ b/target/linux/generic/patches-3.0/476-mtd-m25p80-allow-to-disable-small-sector-erase.patch @@ -0,0 +1,41 @@ +--- a/drivers/mtd/devices/Kconfig ++++ b/drivers/mtd/devices/Kconfig +@@ -102,6 +102,14 @@ config M25PXX_USE_FAST_READ + help + This option enables FAST_READ access supported by ST M25Pxx. + ++config M25PXX_PREFER_SMALL_SECTOR_ERASE ++ bool "Prefer small sector erase" ++ depends on MTD_M25P80 ++ default y ++ help ++ This option enables use of the small erase sectors if that is ++ supported by the flash chip. ++ + config MTD_SST25L + tristate "Support SST25L (non JEDEC) SPI Flash chips" + depends on SPI_MASTER +--- a/drivers/mtd/devices/m25p80.c ++++ b/drivers/mtd/devices/m25p80.c +@@ -83,6 +83,12 @@ + + #define JEDEC_MFR(_jedec_id) ((_jedec_id) >> 16) + ++#ifdef CONFIG_M25PXX_PREFER_SMALL_SECTOR_ERASE ++#define PREFER_SMALL_SECTOR_ERASE 1 ++#else ++#define PREFER_SMALL_SECTOR_ERASE 0 ++#endif ++ + /****************************************************************************/ + + struct m25p { +@@ -924,7 +930,7 @@ static int __devinit m25p_probe(struct s + flash->mtd.write = m25p80_write; + + /* prefer "small sector" erase if possible */ +- if (info->flags & SECT_4K) { ++ if (PREFER_SMALL_SECTOR_ERASE && (info->flags & SECT_4K)) { + flash->erase_opcode = OPCODE_BE_4K; + flash->mtd.erasesize = 4096; + } else if (info->flags & SECT_4K_PMC) { diff --git a/target/linux/generic/patches-3.1/476-mtd-m25p80-allow-to-disable-small-sector-erase.patch b/target/linux/generic/patches-3.1/476-mtd-m25p80-allow-to-disable-small-sector-erase.patch new file mode 100644 index 0000000..cc78d91 --- /dev/null +++ b/target/linux/generic/patches-3.1/476-mtd-m25p80-allow-to-disable-small-sector-erase.patch @@ -0,0 +1,41 @@ +--- a/drivers/mtd/devices/Kconfig ++++ b/drivers/mtd/devices/Kconfig +@@ -102,6 +102,14 @@ config M25PXX_USE_FAST_READ + help + This option enables FAST_READ access supported by ST M25Pxx. + ++config M25PXX_PREFER_SMALL_SECTOR_ERASE ++ bool "Prefer small sector erase" ++ depends on MTD_M25P80 ++ default y ++ help ++ This option enables use of the small erase sectors if that is ++ supported by the flash chip. ++ + config MTD_SST25L + tristate "Support SST25L (non JEDEC) SPI Flash chips" + depends on SPI_MASTER +--- a/drivers/mtd/devices/m25p80.c ++++ b/drivers/mtd/devices/m25p80.c +@@ -83,6 +83,12 @@ + + #define JEDEC_MFR(_jedec_id) ((_jedec_id) >> 16) + ++#ifdef CONFIG_M25PXX_PREFER_SMALL_SECTOR_ERASE ++#define PREFER_SMALL_SECTOR_ERASE 1 ++#else ++#define PREFER_SMALL_SECTOR_ERASE 0 ++#endif ++ + /****************************************************************************/ + + struct m25p { +@@ -924,7 +930,7 @@ static int __devinit m25p_probe(struct s + flash->mtd.write = m25p80_write; + + /* prefer "small sector" erase if possible */ +- if (info->flags & SECT_4K) { ++ if (PREFER_SMALL_SECTOR_ERASE && (info->flags & SECT_4K)) { + flash->erase_opcode = OPCODE_BE_4K; + flash->mtd.erasesize = 4096; + } else if (info->flags & SECT_4K_PMC) { |