diff options
Diffstat (limited to 'target/linux/generic/patches-4.9/411-mtd-partial_eraseblock_write.patch')
| -rw-r--r-- | target/linux/generic/patches-4.9/411-mtd-partial_eraseblock_write.patch | 52 |
1 files changed, 27 insertions, 25 deletions
diff --git a/target/linux/generic/patches-4.9/411-mtd-partial_eraseblock_write.patch b/target/linux/generic/patches-4.9/411-mtd-partial_eraseblock_write.patch index ced1f615ca..0e2d4920e4 100644 --- a/target/linux/generic/patches-4.9/411-mtd-partial_eraseblock_write.patch +++ b/target/linux/generic/patches-4.9/411-mtd-partial_eraseblock_write.patch @@ -9,7 +9,7 @@ /* Our partition linked list */ static LIST_HEAD(mtd_partitions); static DEFINE_MUTEX(mtd_partitions_mutex); -@@ -235,13 +237,61 @@ static int part_erase(struct mtd_info *m +@@ -241,13 +243,61 @@ static int part_erase(struct mtd_info *m struct mtd_part *part = mtd_to_part(mtd); int ret; @@ -19,33 +19,33 @@ + size_t readlen = 0; + u64 mtd_ofs; + -+ instr->erase_buf = kmalloc(part->master->erasesize, GFP_ATOMIC); ++ instr->erase_buf = kmalloc(part->parent->erasesize, GFP_ATOMIC); + if (!instr->erase_buf) + return -ENOMEM; + + mtd_ofs = part->offset + instr->addr; -+ instr->erase_buf_ofs = do_div(mtd_ofs, part->master->erasesize); ++ instr->erase_buf_ofs = do_div(mtd_ofs, part->parent->erasesize); + + if (instr->erase_buf_ofs > 0) { + instr->addr -= instr->erase_buf_ofs; -+ ret = mtd_read(part->master, ++ ret = mtd_read(part->parent, + instr->addr + part->offset, -+ part->master->erasesize, ++ part->parent->erasesize, + &readlen, instr->erase_buf); + + instr->len += instr->erase_buf_ofs; + instr->partial_start = true; + } else { + mtd_ofs = part->offset + part->mtd.size; -+ instr->erase_buf_ofs = part->master->erasesize - -+ do_div(mtd_ofs, part->master->erasesize); ++ instr->erase_buf_ofs = part->parent->erasesize - ++ do_div(mtd_ofs, part->parent->erasesize); + + if (instr->erase_buf_ofs > 0) { + instr->len += instr->erase_buf_ofs; -+ ret = mtd_read(part->master, ++ ret = mtd_read(part->parent, + part->offset + instr->addr + -+ instr->len - part->master->erasesize, -+ part->master->erasesize, &readlen, ++ instr->len - part->parent->erasesize, ++ part->parent->erasesize, &readlen, + instr->erase_buf); + } else { + ret = 0; @@ -59,7 +59,7 @@ + } + instr->addr += part->offset; - ret = part->master->_erase(part->master, instr); + ret = part->parent->_erase(part->parent, instr); if (ret) { if (instr->fail_addr != MTD_FAIL_ADDR_UNKNOWN) instr->fail_addr -= part->offset; @@ -71,7 +71,7 @@ return ret; } -@@ -249,6 +299,25 @@ void mtd_erase_callback(struct erase_inf +@@ -255,6 +305,25 @@ void mtd_erase_callback(struct erase_inf { if (instr->mtd->_erase == part_erase) { struct mtd_part *part = mtd_to_part(instr->mtd); @@ -79,17 +79,17 @@ + + if (instr->mtd->flags & MTD_ERASE_PARTIAL) { + if (instr->partial_start) { -+ part->master->_write(part->master, ++ part->parent->_write(part->parent, + instr->addr, instr->erase_buf_ofs, + &wrlen, instr->erase_buf); + instr->addr += instr->erase_buf_ofs; + } else { + instr->len -= instr->erase_buf_ofs; -+ part->master->_write(part->master, ++ part->parent->_write(part->parent, + instr->addr + instr->len, + instr->erase_buf_ofs, &wrlen, + instr->erase_buf + -+ part->master->erasesize - ++ part->parent->erasesize - + instr->erase_buf_ofs); + } + kfree(instr->erase_buf); @@ -97,30 +97,32 @@ if (instr->fail_addr != MTD_FAIL_ADDR_UNKNOWN) instr->fail_addr -= part->offset; -@@ -564,17 +633,20 @@ static struct mtd_part *allocate_partiti - if ((slave->mtd.flags & MTD_WRITEABLE) && - mtd_mod_by_eb(slave->offset, &slave->mtd)) { +@@ -561,19 +630,22 @@ static struct mtd_part *allocate_partiti + remainder = do_div(tmp, wr_alignment); + if ((slave->mtd.flags & MTD_WRITEABLE) && remainder) { /* Doesn't start on a boundary of major erase size */ - /* FIXME: Let it be writable if it is on a boundary of - * _minor_ erase size though */ - slave->mtd.flags &= ~MTD_WRITEABLE; -- printk(KERN_WARNING"mtd: partition \"%s\" doesn't start on an erase block boundary -- force read-only\n", +- printk(KERN_WARNING"mtd: partition \"%s\" doesn't start on an erase/write block boundary -- force read-only\n", - part->name); + slave->mtd.flags |= MTD_ERASE_PARTIAL; -+ if (((u32) slave->mtd.size) > master->erasesize) ++ if (((u32)slave->mtd.size) > parent->erasesize) + slave->mtd.flags &= ~MTD_WRITEABLE; + else + slave->mtd.erasesize = slave->mtd.size; } - if ((slave->mtd.flags & MTD_WRITEABLE) && -- mtd_mod_by_eb(slave->mtd.size, &slave->mtd)) { + +- tmp = slave->mtd.size; ++ tmp = slave->offset + slave->mtd.size; + remainder = do_div(tmp, wr_alignment); + if ((slave->mtd.flags & MTD_WRITEABLE) && remainder) { - slave->mtd.flags &= ~MTD_WRITEABLE; -- printk(KERN_WARNING"mtd: partition \"%s\" doesn't end on an erase block -- force read-only\n", +- printk(KERN_WARNING"mtd: partition \"%s\" doesn't end on an erase/write block -- force read-only\n", - part->name); -+ mtd_mod_by_eb(slave->offset + slave->mtd.size, &slave->mtd)) { + slave->mtd.flags |= MTD_ERASE_PARTIAL; + -+ if ((u32) slave->mtd.size > master->erasesize) ++ if ((u32)slave->mtd.size > parent->erasesize) + slave->mtd.flags &= ~MTD_WRITEABLE; + else + slave->mtd.erasesize = slave->mtd.size; |