diff options
author | juhosg <juhosg@3c298f89-4303-0410-b956-a3cf2f4a3e73> | 2012-05-18 20:10:51 +0000 |
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committer | juhosg <juhosg@3c298f89-4303-0410-b956-a3cf2f4a3e73> | 2012-05-18 20:10:51 +0000 |
commit | 2bb56acc0c06fea8bbcbeca7324ddf98682f057d (patch) | |
tree | 4f4d693fb40653de79a8107f7254d31eed9b3582 /target/linux/generic/patches-2.6.39/401-partial_eraseblock_write.patch | |
parent | 2afa505fd161000c879a842bb004539ba32ddd57 (diff) |
linux/2.6.39: R.I.P.
git-svn-id: svn://svn.openwrt.org/openwrt/trunk@31808 3c298f89-4303-0410-b956-a3cf2f4a3e73
Diffstat (limited to 'target/linux/generic/patches-2.6.39/401-partial_eraseblock_write.patch')
-rw-r--r-- | target/linux/generic/patches-2.6.39/401-partial_eraseblock_write.patch | 145 |
1 files changed, 0 insertions, 145 deletions
diff --git a/target/linux/generic/patches-2.6.39/401-partial_eraseblock_write.patch b/target/linux/generic/patches-2.6.39/401-partial_eraseblock_write.patch deleted file mode 100644 index 873c0d1cb..000000000 --- a/target/linux/generic/patches-2.6.39/401-partial_eraseblock_write.patch +++ /dev/null @@ -1,145 +0,0 @@ ---- a/drivers/mtd/mtdpart.c -+++ b/drivers/mtd/mtdpart.c -@@ -33,6 +33,8 @@ - #include <linux/magic.h> - #include <linux/err.h> - -+#define MTD_ERASE_PARTIAL 0x8000 /* partition only covers parts of an erase block */ -+ - /* Our partition linked list */ - static LIST_HEAD(mtd_partitions); - static DEFINE_MUTEX(mtd_partitions_mutex); -@@ -256,13 +258,60 @@ static int part_erase(struct mtd_info *m - return -EROFS; - if (instr->addr >= mtd->size) - return -EINVAL; -+ -+ instr->partial_start = false; -+ if (mtd->flags & MTD_ERASE_PARTIAL) { -+ size_t readlen = 0; -+ u64 mtd_ofs; -+ -+ instr->erase_buf = kmalloc(part->master->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); -+ -+ if (instr->erase_buf_ofs > 0) { -+ instr->addr -= instr->erase_buf_ofs; -+ ret = part->master->read(part->master, -+ instr->addr + part->offset, -+ part->master->erasesize, -+ &readlen, instr->erase_buf); -+ -+ 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); -+ -+ if (instr->erase_buf_ofs > 0) { -+ instr->len += instr->erase_buf_ofs; -+ ret = part->master->read(part->master, -+ part->offset + instr->addr + -+ instr->len - part->master->erasesize, -+ part->master->erasesize, &readlen, -+ instr->erase_buf); -+ } else { -+ ret = 0; -+ } -+ } -+ if (ret < 0) { -+ kfree(instr->erase_buf); -+ return ret; -+ } -+ -+ } -+ - instr->addr += part->offset; - ret = part->master->erase(part->master, instr); - if (ret) { - if (instr->fail_addr != MTD_FAIL_ADDR_UNKNOWN) - instr->fail_addr -= part->offset; - instr->addr -= part->offset; -+ if (mtd->flags & MTD_ERASE_PARTIAL) -+ kfree(instr->erase_buf); - } -+ - return ret; - } - -@@ -270,7 +319,25 @@ void mtd_erase_callback(struct erase_inf - { - if (instr->mtd->erase == part_erase) { - struct mtd_part *part = PART(instr->mtd); -+ size_t wrlen = 0; - -+ if (instr->mtd->flags & MTD_ERASE_PARTIAL) { -+ if (instr->partial_start) { -+ part->master->write(part->master, -+ 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, -+ instr->addr + instr->len, -+ instr->erase_buf_ofs, &wrlen, -+ instr->erase_buf + -+ part->master->erasesize - -+ instr->erase_buf_ofs); -+ } -+ kfree(instr->erase_buf); -+ } - if (instr->fail_addr != MTD_FAIL_ADDR_UNKNOWN) - instr->fail_addr -= part->offset; - instr->addr -= part->offset; -@@ -529,18 +596,24 @@ static struct mtd_part *allocate_partiti - if ((slave->mtd.flags & MTD_WRITEABLE) && - mtd_mod_by_eb(slave->offset, &slave->mtd)) { - /* 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", -- part->name); -+ slave->mtd.flags |= MTD_ERASE_PARTIAL; -+ if (((u32) slave->mtd.size) > master->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)) { -- slave->mtd.flags &= ~MTD_WRITEABLE; -- printk(KERN_WARNING"mtd: partition \"%s\" doesn't end on an erase 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) -+ slave->mtd.flags &= ~MTD_WRITEABLE; -+ else -+ slave->mtd.erasesize = slave->mtd.size; - } -+ if ((slave->mtd.flags & (MTD_ERASE_PARTIAL|MTD_WRITEABLE)) == MTD_ERASE_PARTIAL) -+ printk(KERN_WARNING"mtd: partition \"%s\" must either start or end on erase block boundary or be smaller than an erase block -- forcing read-only\n", -+ part->name); - - slave->mtd.ecclayout = master->ecclayout; - if (master->block_isbad) { ---- a/include/linux/mtd/mtd.h -+++ b/include/linux/mtd/mtd.h -@@ -57,6 +57,10 @@ struct erase_info { - u_long priv; - u_char state; - struct erase_info *next; -+ -+ u8 *erase_buf; -+ u32 erase_buf_ofs; -+ bool partial_start; - }; - - struct mtd_erase_region_info { |