mirror of https://github.com/hak5/openwrt.git
93 lines
3.0 KiB
Diff
93 lines
3.0 KiB
Diff
From dfe4b4c732365fc1d83c2d2fd9cc18054ae850b7 Mon Sep 17 00:00:00 2001
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From: =?UTF-8?q?Rafa=C5=82=20Mi=C5=82ecki?= <zajec5@gmail.com>
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Date: Sun, 6 Dec 2015 11:24:05 +0100
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Subject: [PATCH] mtd: bcm47xxpart: don't fail because of bit-flips
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MIME-Version: 1.0
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Content-Type: text/plain; charset=UTF-8
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Content-Transfer-Encoding: 8bit
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Bit-flip errors may occur on NAND flashes and are harmless. Handle them
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gracefully as read content is still reliable and can be parsed.
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Signed-off-by: Rafał Miłecki <zajec5@gmail.com>
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---
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drivers/mtd/bcm47xxpart.c | 38 ++++++++++++++++++++++----------------
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1 file changed, 22 insertions(+), 16 deletions(-)
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--- a/drivers/mtd/bcm47xxpart.c
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+++ b/drivers/mtd/bcm47xxpart.c
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@@ -66,11 +66,13 @@ static const char *bcm47xxpart_trx_data_
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{
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uint32_t buf;
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size_t bytes_read;
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+ int err;
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- if (mtd_read(master, offset, sizeof(buf), &bytes_read,
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- (uint8_t *)&buf) < 0) {
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- pr_err("mtd_read error while parsing (offset: 0x%X)!\n",
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- offset);
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+ err = mtd_read(master, offset, sizeof(buf), &bytes_read,
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+ (uint8_t *)&buf);
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+ if (err && !mtd_is_bitflip(err)) {
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+ pr_err("mtd_read error while parsing (offset: 0x%X): %d\n",
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+ offset, err);
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goto out_default;
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}
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@@ -95,6 +97,7 @@ static int bcm47xxpart_parse(struct mtd_
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int trx_part = -1;
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int last_trx_part = -1;
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int possible_nvram_sizes[] = { 0x8000, 0xF000, 0x10000, };
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+ int err;
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/*
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* Some really old flashes (like AT45DB*) had smaller erasesize-s, but
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@@ -128,10 +131,11 @@ static int bcm47xxpart_parse(struct mtd_
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}
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/* Read beginning of the block */
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- if (mtd_read(master, offset, BCM47XXPART_BYTES_TO_READ,
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- &bytes_read, (uint8_t *)buf) < 0) {
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- pr_err("mtd_read error while parsing (offset: 0x%X)!\n",
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- offset);
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+ err = mtd_read(master, offset, BCM47XXPART_BYTES_TO_READ,
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+ &bytes_read, (uint8_t *)buf);
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+ if (err && !mtd_is_bitflip(err)) {
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+ pr_err("mtd_read error while parsing (offset: 0x%X): %d\n",
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+ offset, err);
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continue;
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}
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@@ -254,10 +258,11 @@ static int bcm47xxpart_parse(struct mtd_
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}
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/* Read middle of the block */
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- if (mtd_read(master, offset + 0x8000, 0x4,
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- &bytes_read, (uint8_t *)buf) < 0) {
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- pr_err("mtd_read error while parsing (offset: 0x%X)!\n",
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- offset);
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+ err = mtd_read(master, offset + 0x8000, 0x4, &bytes_read,
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+ (uint8_t *)buf);
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+ if (err && !mtd_is_bitflip(err)) {
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+ pr_err("mtd_read error while parsing (offset: 0x%X): %d\n",
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+ offset, err);
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continue;
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}
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@@ -277,10 +282,11 @@ static int bcm47xxpart_parse(struct mtd_
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}
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offset = master->size - possible_nvram_sizes[i];
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- if (mtd_read(master, offset, 0x4, &bytes_read,
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- (uint8_t *)buf) < 0) {
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- pr_err("mtd_read error while reading at offset 0x%X!\n",
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- offset);
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+ err = mtd_read(master, offset, 0x4, &bytes_read,
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+ (uint8_t *)buf);
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+ if (err && !mtd_is_bitflip(err)) {
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+ pr_err("mtd_read error while reading (offset 0x%X): %d\n",
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+ offset, err);
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continue;
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}
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