From: Artem Bityutskiy Date: Fri, 3 Feb 2012 16:13:23 +0000 (+0200) Subject: mtd: remove R/O checking duplication X-Git-Url: http://git.lede-project.org./?a=commitdiff_plain;h=664addc248d2fed68d013d26ff2fc796d7134259;p=openwrt%2Fstaging%2Fblogic.git mtd: remove R/O checking duplication Many drivers check whether the partition is R/O and return -EROFS if yes. Let's stop having duplicated checks and move them to the API functions instead. And again a bit of noise - deleted few too sparse newlines, sorry. Signed-off-by: Artem Bityutskiy Signed-off-by: David Woodhouse --- diff --git a/drivers/mtd/chips/map_ram.c b/drivers/mtd/chips/map_ram.c index 225307088dc0..991c2a1c05d3 100644 --- a/drivers/mtd/chips/map_ram.c +++ b/drivers/mtd/chips/map_ram.c @@ -122,14 +122,10 @@ static int mapram_erase (struct mtd_info *mtd, struct erase_info *instr) unsigned long i; allff = map_word_ff(map); - for (i=0; ilen; i += map_bankwidth(map)) map_write(map, allff, instr->addr + i); - instr->state = MTD_ERASE_DONE; - mtd_erase_callback(instr); - return 0; } diff --git a/drivers/mtd/chips/map_rom.c b/drivers/mtd/chips/map_rom.c index facb56092d39..47a43cf7e5c6 100644 --- a/drivers/mtd/chips/map_rom.c +++ b/drivers/mtd/chips/map_rom.c @@ -85,8 +85,7 @@ static void maprom_nop(struct mtd_info *mtd) static int maprom_write (struct mtd_info *mtd, loff_t to, size_t len, size_t *retlen, const u_char *buf) { - printk(KERN_NOTICE "maprom_write called\n"); - return -EIO; + return -EROFS; } static int maprom_erase (struct mtd_info *mtd, struct erase_info *info) diff --git a/drivers/mtd/devices/phram.c b/drivers/mtd/devices/phram.c index 36add7ce4632..d0e8dc69fe1c 100644 --- a/drivers/mtd/devices/phram.c +++ b/drivers/mtd/devices/phram.c @@ -33,7 +33,6 @@ struct phram_mtd_list { static LIST_HEAD(phram_list); - static int phram_erase(struct mtd_info *mtd, struct erase_info *instr) { u_char *start = mtd->priv; diff --git a/drivers/mtd/mtdconcat.c b/drivers/mtd/mtdconcat.c index 1f2071803931..dd24232265e6 100644 --- a/drivers/mtd/mtdconcat.c +++ b/drivers/mtd/mtdconcat.c @@ -126,9 +126,6 @@ concat_write(struct mtd_info *mtd, loff_t to, size_t len, int err = -EINVAL; int i; - if (!(mtd->flags & MTD_WRITEABLE)) - return -EROFS; - *retlen = 0; for (i = 0; i < concat->num_subdev; i++) { @@ -145,11 +142,7 @@ concat_write(struct mtd_info *mtd, loff_t to, size_t len, else size = len; - if (!(subdev->flags & MTD_WRITEABLE)) - err = -EROFS; - else - err = mtd_write(subdev, to, size, &retsize, buf); - + err = mtd_write(subdev, to, size, &retsize, buf); if (err) break; @@ -176,9 +169,6 @@ concat_writev(struct mtd_info *mtd, const struct kvec *vecs, int i; int err = -EINVAL; - if (!(mtd->flags & MTD_WRITEABLE)) - return -EROFS; - *retlen = 0; /* Calculate total length of data */ @@ -220,12 +210,8 @@ concat_writev(struct mtd_info *mtd, const struct kvec *vecs, old_iov_len = vecs_copy[entry_high].iov_len; vecs_copy[entry_high].iov_len = size; - if (!(subdev->flags & MTD_WRITEABLE)) - err = -EROFS; - else - err = mtd_writev(subdev, &vecs_copy[entry_low], - entry_high - entry_low + 1, to, - &retsize); + err = mtd_writev(subdev, &vecs_copy[entry_low], + entry_high - entry_low + 1, to, &retsize); vecs_copy[entry_high].iov_len = old_iov_len - size; vecs_copy[entry_high].iov_base += size; @@ -399,9 +385,6 @@ static int concat_erase(struct mtd_info *mtd, struct erase_info *instr) uint64_t length, offset = 0; struct erase_info *erase; - if (!(mtd->flags & MTD_WRITEABLE)) - return -EROFS; - /* * Check for proper erase block alignment of the to-be-erased area. * It is easier to do this based on the super device's erase @@ -489,10 +472,6 @@ static int concat_erase(struct mtd_info *mtd, struct erase_info *instr) else erase->len = length; - if (!(subdev->flags & MTD_WRITEABLE)) { - err = -EROFS; - break; - } length -= erase->len; if ((err = concat_dev_erase(subdev, erase))) { /* sanity check: should never happen since diff --git a/drivers/mtd/mtdcore.c b/drivers/mtd/mtdcore.c index 8d5e103695f9..b9b28647adef 100644 --- a/drivers/mtd/mtdcore.c +++ b/drivers/mtd/mtdcore.c @@ -693,6 +693,8 @@ int mtd_erase(struct mtd_info *mtd, struct erase_info *instr) { if (instr->addr > mtd->size || instr->len > mtd->size - instr->addr) return -EINVAL; + if (!(mtd->flags & MTD_WRITEABLE)) + return -EROFS; return mtd->_erase(mtd, instr); } EXPORT_SYMBOL_GPL(mtd_erase); @@ -752,10 +754,10 @@ int mtd_write(struct mtd_info *mtd, loff_t to, size_t len, size_t *retlen, const u_char *buf) { *retlen = 0; - if (!mtd->_write) - return -EROFS; if (to < 0 || to > mtd->size || len > mtd->size - to) return -EINVAL; + if (!mtd->_write || !(mtd->flags & MTD_WRITEABLE)) + return -EROFS; return mtd->_write(mtd, to, len, retlen, buf); } EXPORT_SYMBOL_GPL(mtd_write); @@ -775,6 +777,8 @@ int mtd_panic_write(struct mtd_info *mtd, loff_t to, size_t len, size_t *retlen, return -EOPNOTSUPP; if (to < 0 || to > mtd->size || len > mtd->size - to) return -EINVAL; + if (!(mtd->flags & MTD_WRITEABLE)) + return -EROFS; return mtd->_panic_write(mtd, to, len, retlen, buf); } EXPORT_SYMBOL_GPL(mtd_panic_write); @@ -826,6 +830,8 @@ int mtd_block_markbad(struct mtd_info *mtd, loff_t ofs) return -EOPNOTSUPP; if (ofs < 0 || ofs > mtd->size) return -EINVAL; + if (!(mtd->flags & MTD_WRITEABLE)) + return -EROFS; return mtd->_block_markbad(mtd, ofs); } EXPORT_SYMBOL_GPL(mtd_block_markbad); @@ -877,6 +883,8 @@ int mtd_writev(struct mtd_info *mtd, const struct kvec *vecs, unsigned long count, loff_t to, size_t *retlen) { *retlen = 0; + if (!(mtd->flags & MTD_WRITEABLE)) + return -EROFS; if (!mtd->_writev) return default_mtd_writev(mtd, vecs, count, to, retlen); return mtd->_writev(mtd, vecs, count, to, retlen); diff --git a/drivers/mtd/mtdpart.c b/drivers/mtd/mtdpart.c index fbe2c8a22e1c..33d32c6f4f58 100644 --- a/drivers/mtd/mtdpart.c +++ b/drivers/mtd/mtdpart.c @@ -172,8 +172,6 @@ static int part_write(struct mtd_info *mtd, loff_t to, size_t len, size_t *retlen, const u_char *buf) { struct mtd_part *part = PART(mtd); - if (!(mtd->flags & MTD_WRITEABLE)) - return -EROFS; return mtd_write(part->master, to + part->offset, len, retlen, buf); } @@ -181,8 +179,6 @@ static int part_panic_write(struct mtd_info *mtd, loff_t to, size_t len, size_t *retlen, const u_char *buf) { struct mtd_part *part = PART(mtd); - if (!(mtd->flags & MTD_WRITEABLE)) - return -EROFS; return mtd_panic_write(part->master, to + part->offset, len, retlen, buf); } @@ -192,9 +188,6 @@ static int part_write_oob(struct mtd_info *mtd, loff_t to, { struct mtd_part *part = PART(mtd); - if (!(mtd->flags & MTD_WRITEABLE)) - return -EROFS; - if (to >= mtd->size) return -EINVAL; if (ops->datbuf && to + ops->len > mtd->size) @@ -220,8 +213,6 @@ static int part_writev(struct mtd_info *mtd, const struct kvec *vecs, unsigned long count, loff_t to, size_t *retlen) { struct mtd_part *part = PART(mtd); - if (!(mtd->flags & MTD_WRITEABLE)) - return -EROFS; return mtd_writev(part->master, vecs, count, to + part->offset, retlen); } @@ -230,8 +221,7 @@ static int part_erase(struct mtd_info *mtd, struct erase_info *instr) { struct mtd_part *part = PART(mtd); int ret; - if (!(mtd->flags & MTD_WRITEABLE)) - return -EROFS; + instr->addr += part->offset; ret = mtd_erase(part->master, instr); if (ret) { @@ -304,8 +294,6 @@ static int part_block_markbad(struct mtd_info *mtd, loff_t ofs) struct mtd_part *part = PART(mtd); int res; - if (!(mtd->flags & MTD_WRITEABLE)) - return -EROFS; ofs += part->offset; res = mtd_block_markbad(part->master, ofs); if (!res) diff --git a/drivers/mtd/ubi/gluebi.c b/drivers/mtd/ubi/gluebi.c index b875c2c50d82..90b98822d9a4 100644 --- a/drivers/mtd/ubi/gluebi.c +++ b/drivers/mtd/ubi/gluebi.c @@ -215,10 +215,6 @@ static int gluebi_write(struct mtd_info *mtd, loff_t to, size_t len, struct gluebi_device *gluebi; gluebi = container_of(mtd, struct gluebi_device, mtd); - - if (!(mtd->flags & MTD_WRITEABLE)) - return -EROFS; - lnum = div_u64_rem(to, mtd->erasesize, &offs); if (len % mtd->writesize || offs % mtd->writesize) @@ -263,12 +259,8 @@ static int gluebi_erase(struct mtd_info *mtd, struct erase_info *instr) lnum = mtd_div_by_eb(instr->addr, mtd); count = mtd_div_by_eb(instr->len, mtd); - gluebi = container_of(mtd, struct gluebi_device, mtd); - if (!(mtd->flags & MTD_WRITEABLE)) - return -EROFS; - for (i = 0; i < count - 1; i++) { err = ubi_leb_unmap(gluebi->desc, lnum + i); if (err) diff --git a/include/linux/mtd/mtd.h b/include/linux/mtd/mtd.h index 317a80c4d54c..fa20a8f0463a 100644 --- a/include/linux/mtd/mtd.h +++ b/include/linux/mtd/mtd.h @@ -268,6 +268,8 @@ static inline int mtd_write_oob(struct mtd_info *mtd, loff_t to, ops->retlen = ops->oobretlen = 0; if (!mtd->_write_oob) return -EOPNOTSUPP; + if (!(mtd->flags & MTD_WRITEABLE)) + return -EROFS; return mtd->_write_oob(mtd, to, ops); }