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author | Felix Fietkau <nbd@nbd.name> | 2017-01-08 18:58:29 +0100 |
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committer | Felix Fietkau <nbd@nbd.name> | 2017-01-16 20:40:12 +0100 |
commit | 8ab057f5e4150affe44a630c53a113e74618ab09 (patch) | |
tree | 381cf81653ceaeafa402d30c9f69ab51bd796b41 /target/linux/generic/patches-3.18/502-yaffs-fix-compat-tags-handling.patch | |
parent | 21591a336198beaffa11d40e3581215ef0fe67ec (diff) | |
download | upstream-8ab057f5e4150affe44a630c53a113e74618ab09.tar.gz upstream-8ab057f5e4150affe44a630c53a113e74618ab09.tar.bz2 upstream-8ab057f5e4150affe44a630c53a113e74618ab09.zip |
kernel: remove yaffs2 support, it is no longer needed
Signed-off-by: Felix Fietkau <nbd@nbd.name>
Diffstat (limited to 'target/linux/generic/patches-3.18/502-yaffs-fix-compat-tags-handling.patch')
-rw-r--r-- | target/linux/generic/patches-3.18/502-yaffs-fix-compat-tags-handling.patch | 239 |
1 files changed, 0 insertions, 239 deletions
diff --git a/target/linux/generic/patches-3.18/502-yaffs-fix-compat-tags-handling.patch b/target/linux/generic/patches-3.18/502-yaffs-fix-compat-tags-handling.patch deleted file mode 100644 index a18cf6fd7b..0000000000 --- a/target/linux/generic/patches-3.18/502-yaffs-fix-compat-tags-handling.patch +++ /dev/null @@ -1,239 +0,0 @@ -Subject: yaffs: fix compat tags handling - -Signed-off-by: Gabor Juhos <juhosg@openwrt.org> ---- ---- a/fs/yaffs2/yaffs_tagscompat.c -+++ b/fs/yaffs2/yaffs_tagscompat.c -@@ -17,7 +17,9 @@ - #include "yaffs_getblockinfo.h" - #include "yaffs_trace.h" - -+#if 0 - static void yaffs_handle_rd_data_error(struct yaffs_dev *dev, int nand_chunk); -+#endif - - - /********** Tags ECC calculations *********/ -@@ -71,6 +73,7 @@ int yaffs_check_tags_ecc(struct yaffs_ta - return 0; - } - -+#if 0 - /********** Tags **********/ - - static void yaffs_load_tags_to_spare(struct yaffs_spare *spare_ptr, -@@ -379,3 +382,214 @@ void yaffs_tags_compat_install(struct ya - if(!dev->tagger.mark_bad_fn) - dev->tagger.mark_bad_fn = yaffs_tags_compat_mark_bad; - } -+#else -+ -+#include "yaffs_packedtags1.h" -+ -+static int yaffs_tags_compat_write(struct yaffs_dev *dev, -+ int nand_chunk, -+ const u8 *data, -+ const struct yaffs_ext_tags *tags) -+{ -+ struct yaffs_packed_tags1 pt1; -+ u8 tag_buf[9]; -+ int retval; -+ -+ /* we assume that yaffs_packed_tags1 and yaffs_tags are compatible */ -+ compile_time_assertion(sizeof(struct yaffs_packed_tags1) == 12); -+ compile_time_assertion(sizeof(struct yaffs_tags) == 8); -+ -+ yaffs_pack_tags1(&pt1, tags); -+ yaffs_calc_tags_ecc((struct yaffs_tags *)&pt1); -+ -+ /* When deleting a chunk, the upper layer provides only skeletal -+ * tags, one with is_deleted set. However, we need to update the -+ * tags, not erase them completely. So we use the NAND write property -+ * that only zeroed-bits stick and set tag bytes to all-ones and -+ * zero just the (not) deleted bit. -+ */ -+ if (!dev->param.tags_9bytes) { -+ if (tags->is_deleted) { -+ memset(&pt1, 0xff, 8); -+ /* clear delete status bit to indicate deleted */ -+ pt1.deleted = 0; -+ } -+ memcpy(tag_buf, &pt1, 8); -+ } else { -+ if (tags->is_deleted) { -+ memset(tag_buf, 0xff, 8); -+ tag_buf[8] = 0; -+ } else { -+ memcpy(tag_buf, &pt1, 8); -+ tag_buf[8] = 0xff; -+ } -+ } -+ -+ retval = dev->drv.drv_write_chunk_fn(dev, nand_chunk, -+ data, -+ (data) ? dev->data_bytes_per_chunk : 0, -+ tag_buf, -+ (dev->param.tags_9bytes) ? 9 : 8); -+ -+ return retval; -+} -+ -+/* Return with empty extended tags but add ecc_result. -+ */ -+static int return_empty_tags(struct yaffs_ext_tags *tags, -+ enum yaffs_ecc_result ecc_result, -+ int retval) -+{ -+ if (tags) { -+ memset(tags, 0, sizeof(*tags)); -+ tags->ecc_result = ecc_result; -+ } -+ -+ return retval; -+} -+ -+static int yaffs_tags_compat_read(struct yaffs_dev *dev, -+ int nand_chunk, -+ u8 *data, -+ struct yaffs_ext_tags *tags) -+{ -+ struct yaffs_packed_tags1 pt1; -+ enum yaffs_ecc_result ecc_result; -+ int retval; -+ int deleted; -+ u8 tag_buf[9]; -+ -+ retval = dev->drv.drv_read_chunk_fn(dev, nand_chunk, -+ data, dev->param.total_bytes_per_chunk, -+ tag_buf, -+ (dev->param.tags_9bytes) ? 9 : 8, -+ &ecc_result); -+ -+ switch (ecc_result) { -+ case YAFFS_ECC_RESULT_NO_ERROR: -+ case YAFFS_ECC_RESULT_FIXED: -+ break; -+ -+ case YAFFS_ECC_RESULT_UNFIXED: -+ default: -+ return_empty_tags(tags, YAFFS_ECC_RESULT_UNFIXED, 0); -+ tags->block_bad = dev->drv.drv_check_bad_fn(dev, nand_chunk); -+ return YAFFS_FAIL; -+ } -+ -+ /* Check for a blank/erased chunk. */ -+ if (yaffs_check_ff(tag_buf, 8)) { -+ /* when blank, upper layers want ecc_result to be <= NO_ERROR */ -+ return return_empty_tags(tags, YAFFS_ECC_RESULT_NO_ERROR, -+ YAFFS_OK); -+ } -+ -+ memcpy(&pt1, tag_buf, 8); -+ -+ if (!dev->param.tags_9bytes) { -+ /* Read deleted status (bit) then return it to it's non-deleted -+ * state before performing tags mini-ECC check. pt1.deleted is -+ * inverted. -+ */ -+ deleted = !pt1.deleted; -+ pt1.deleted = 1; -+ } else { -+ deleted = (hweight8(tag_buf[8]) < 7) ? 1 : 0; -+ } -+ -+ /* Check the packed tags mini-ECC and correct if necessary/possible. */ -+ retval = yaffs_check_tags_ecc((struct yaffs_tags *)&pt1); -+ switch (retval) { -+ case 0: -+ /* no tags error, use MTD result */ -+ break; -+ case 1: -+ /* recovered tags-ECC error */ -+ dev->n_tags_ecc_fixed++; -+ if (ecc_result == YAFFS_ECC_RESULT_NO_ERROR) -+ ecc_result = YAFFS_ECC_RESULT_FIXED; -+ break; -+ default: -+ /* unrecovered tags-ECC error */ -+ dev->n_tags_ecc_unfixed++; -+ return return_empty_tags(tags, YAFFS_ECC_RESULT_UNFIXED, -+ YAFFS_FAIL); -+ } -+ -+ /* Unpack the tags to extended form and set ECC result. -+ * [set should_be_ff just to keep yaffs_unpack_tags1 happy] -+ */ -+ pt1.should_be_ff = 0xffffffff; -+ yaffs_unpack_tags1(tags, &pt1); -+ tags->ecc_result = ecc_result; -+ -+ /* Set deleted state */ -+ tags->is_deleted = deleted; -+ return YAFFS_OK; -+} -+ -+static int yaffs_tags_compat_mark_bad(struct yaffs_dev *dev, int block_no) -+{ -+ return dev->drv.drv_mark_bad_fn(dev, block_no); -+} -+ -+static int yaffs_tags_compat_query_block(struct yaffs_dev *dev, -+ int block_no, -+ enum yaffs_block_state *state, -+ u32 *seq_number) -+{ -+ struct yaffs_ext_tags tags; -+ int retval; -+ -+ yaffs_trace(YAFFS_TRACE_MTD, "%s %d", __func__, block_no); -+ -+ *seq_number = 0; -+ -+ retval = dev->drv.drv_check_bad_fn(dev, block_no); -+ if (retval == YAFFS_FAIL) { -+ *state = YAFFS_BLOCK_STATE_DEAD; -+ goto out; -+ } -+ -+ yaffs_tags_compat_read(dev, block_no * dev->param.chunks_per_block, -+ NULL, &tags); -+ -+ if (tags.ecc_result != YAFFS_ECC_RESULT_NO_ERROR) { -+ yaffs_trace(YAFFS_TRACE_MTD, "block %d is marked bad", -+ block_no); -+ *state = YAFFS_BLOCK_STATE_NEEDS_SCAN; -+ } else if (tags.chunk_used) { -+ *seq_number = tags.seq_number; -+ *state = YAFFS_BLOCK_STATE_NEEDS_SCAN; -+ } else { -+ *state = YAFFS_BLOCK_STATE_EMPTY; -+ } -+ -+ retval = YAFFS_OK; -+ -+out: -+ yaffs_trace(YAFFS_TRACE_MTD, -+ "block query returns seq %u state %d", -+ *seq_number, *state); -+ -+ return retval; -+} -+ -+void yaffs_tags_compat_install(struct yaffs_dev *dev) -+{ -+ if (dev->param.is_yaffs2) -+ return; -+ -+ if (!dev->tagger.write_chunk_tags_fn) -+ dev->tagger.write_chunk_tags_fn = yaffs_tags_compat_write; -+ -+ if (!dev->tagger.read_chunk_tags_fn) -+ dev->tagger.read_chunk_tags_fn = yaffs_tags_compat_read; -+ -+ if (!dev->tagger.query_block_fn) -+ dev->tagger.query_block_fn = yaffs_tags_compat_query_block; -+ -+ if (!dev->tagger.mark_bad_fn) -+ dev->tagger.mark_bad_fn = yaffs_tags_compat_mark_bad; -+} -+#endif |