From 3333f75cafc6d45491eeb2b104a01bf8cb90cd78 Mon Sep 17 00:00:00 2001 From: =?UTF-8?q?Rafa=C5=82=20Mi=C5=82ecki?= Date: Mon, 7 Dec 2015 09:31:52 +0000 Subject: kernel: add bcm47xxpart patches sent for 4.5 merge window MIME-Version: 1.0 Content-Type: text/plain; charset=UTF-8 Content-Transfer-Encoding: 8bit This replaces old bcm53xx patch for scanning whole flash and makes bcm47xxpart compatible with NAND. Signed-off-by: Rafał Miłecki SVN-Revision: 47800 --- ...m47xxpart-don-t-fail-because-of-bit-flips.patch | 97 ++++++++++++++++++++++ 1 file changed, 97 insertions(+) create mode 100644 target/linux/generic/patches-3.18/142-mtd-bcm47xxpart-don-t-fail-because-of-bit-flips.patch (limited to 'target/linux/generic/patches-3.18/142-mtd-bcm47xxpart-don-t-fail-because-of-bit-flips.patch') diff --git a/target/linux/generic/patches-3.18/142-mtd-bcm47xxpart-don-t-fail-because-of-bit-flips.patch b/target/linux/generic/patches-3.18/142-mtd-bcm47xxpart-don-t-fail-because-of-bit-flips.patch new file mode 100644 index 0000000000..f9e81f9395 --- /dev/null +++ b/target/linux/generic/patches-3.18/142-mtd-bcm47xxpart-don-t-fail-because-of-bit-flips.patch @@ -0,0 +1,97 @@ +From dfe4b4c732365fc1d83c2d2fd9cc18054ae850b7 Mon Sep 17 00:00:00 2001 +From: =?UTF-8?q?Rafa=C5=82=20Mi=C5=82ecki?= +Date: Sun, 6 Dec 2015 11:24:05 +0100 +Subject: [PATCH] mtd: bcm47xxpart: don't fail because of bit-flips +MIME-Version: 1.0 +Content-Type: text/plain; charset=UTF-8 +Content-Transfer-Encoding: 8bit + +Bit-flip errors may occur on NAND flashes and are harmless. Handle them +gracefully as read content is still reliable and can be parsed. + +Signed-off-by: Rafał Miłecki +--- + drivers/mtd/bcm47xxpart.c | 38 ++++++++++++++++++++++---------------- + 1 file changed, 22 insertions(+), 16 deletions(-) + +diff --git a/drivers/mtd/bcm47xxpart.c b/drivers/mtd/bcm47xxpart.c +index 4450e74..1ab3451 100644 +--- a/drivers/mtd/bcm47xxpart.c ++++ b/drivers/mtd/bcm47xxpart.c +@@ -66,11 +66,13 @@ static const char *bcm47xxpart_trx_data_part_name(struct mtd_info *master, + { + uint32_t buf; + size_t bytes_read; ++ int err; + +- if (mtd_read(master, offset, sizeof(buf), &bytes_read, +- (uint8_t *)&buf) < 0) { +- pr_err("mtd_read error while parsing (offset: 0x%X)!\n", +- offset); ++ err = mtd_read(master, offset, sizeof(buf), &bytes_read, ++ (uint8_t *)&buf); ++ if (err && !mtd_is_bitflip(err)) { ++ pr_err("mtd_read error while parsing (offset: 0x%X): %d\n", ++ offset, err); + goto out_default; + } + +@@ -95,6 +97,7 @@ static int bcm47xxpart_parse(struct mtd_info *master, + int trx_part = -1; + int last_trx_part = -1; + int possible_nvram_sizes[] = { 0x8000, 0xF000, 0x10000, }; ++ int err; + + /* + * Some really old flashes (like AT45DB*) had smaller erasesize-s, but +@@ -128,10 +131,11 @@ static int bcm47xxpart_parse(struct mtd_info *master, + } + + /* Read beginning of the block */ +- if (mtd_read(master, offset, BCM47XXPART_BYTES_TO_READ, +- &bytes_read, (uint8_t *)buf) < 0) { +- pr_err("mtd_read error while parsing (offset: 0x%X)!\n", +- offset); ++ err = mtd_read(master, offset, BCM47XXPART_BYTES_TO_READ, ++ &bytes_read, (uint8_t *)buf); ++ if (err && !mtd_is_bitflip(err)) { ++ pr_err("mtd_read error while parsing (offset: 0x%X): %d\n", ++ offset, err); + continue; + } + +@@ -254,10 +258,11 @@ static int bcm47xxpart_parse(struct mtd_info *master, + } + + /* Read middle of the block */ +- if (mtd_read(master, offset + 0x8000, 0x4, +- &bytes_read, (uint8_t *)buf) < 0) { +- pr_err("mtd_read error while parsing (offset: 0x%X)!\n", +- offset); ++ err = mtd_read(master, offset + 0x8000, 0x4, &bytes_read, ++ (uint8_t *)buf); ++ if (err && !mtd_is_bitflip(err)) { ++ pr_err("mtd_read error while parsing (offset: 0x%X): %d\n", ++ offset, err); + continue; + } + +@@ -277,10 +282,11 @@ static int bcm47xxpart_parse(struct mtd_info *master, + } + + offset = master->size - possible_nvram_sizes[i]; +- if (mtd_read(master, offset, 0x4, &bytes_read, +- (uint8_t *)buf) < 0) { +- pr_err("mtd_read error while reading at offset 0x%X!\n", +- offset); ++ err = mtd_read(master, offset, 0x4, &bytes_read, ++ (uint8_t *)buf); ++ if (err && !mtd_is_bitflip(err)) { ++ pr_err("mtd_read error while reading (offset 0x%X): %d\n", ++ offset, err); + continue; + } + +-- +1.8.4.5 + -- cgit v1.2.3