[MTD] Remove nand writev support

NAND writev(_ecc) support is not longer necessary. Remove it.

Signed-off-by: Thomas Gleixner <tglx@linutronix.de>

6 files changed, 3 insertions, 434 deletions

diff --git a/drivers/mtd/devices/doc2000.c b/drivers/mtd/devices/doc2000.c
index 423a34f4638..6f32942fdf7 100644
--- a/drivers/mtd/devices/doc2000.c
+++ b/drivers/mtd/devices/doc2000.c
@@ -59,9 +59,6 @@ static int doc_read_ecc(struct mtd_info *mtd, loff_t from, size_t len,
 			size_t *retlen, u_char *buf, u_char *eccbuf, struct nand_oobinfo *oobsel);
 static int doc_write_ecc(struct mtd_info *mtd, loff_t to, size_t len,
 			 size_t *retlen, const u_char *buf, u_char *eccbuf, struct nand_oobinfo *oobsel);
-static int doc_writev_ecc(struct mtd_info *mtd, const struct kvec *vecs,
-			  unsigned long count, loff_t to, size_t *retlen,
-			  u_char *eccbuf, struct nand_oobinfo *oobsel);
 static int doc_read_oob(struct mtd_info *mtd, loff_t ofs, size_t len,
 			size_t *retlen, u_char *buf);
 static int doc_write_oob(struct mtd_info *mtd, loff_t ofs, size_t len,
@@ -589,7 +586,6 @@ void DoC2k_init(struct mtd_info *mtd)
 	mtd->write = doc_write;
 	mtd->read_ecc = doc_read_ecc;
 	mtd->write_ecc = doc_write_ecc;
-	mtd->writev_ecc = doc_writev_ecc;
 	mtd->read_oob = doc_read_oob;
 	mtd->write_oob = doc_write_oob;
 	mtd->sync = NULL;
@@ -965,66 +961,6 @@ static int doc_write_ecc(struct mtd_info *mtd, loff_t to, size_t len,
 	return 0;
 }
 
-static int doc_writev_ecc(struct mtd_info *mtd, const struct kvec *vecs,
-			  unsigned long count, loff_t to, size_t *retlen,
-			  u_char *eccbuf, struct nand_oobinfo *oobsel)
-{
-	static char static_buf[512];
-	static DEFINE_MUTEX(writev_buf_mutex);
-
-	size_t totretlen = 0;
-	size_t thisvecofs = 0;
-	int ret= 0;
-
-	mutex_lock(&writev_buf_mutex);
-
-	while(count) {
-		size_t thislen, thisretlen;
-		unsigned char *buf;
-
-		buf = vecs->iov_base + thisvecofs;
-		thislen = vecs->iov_len - thisvecofs;
-
-
-		if (thislen >= 512) {
-			thislen = thislen & ~(512-1);
-			thisvecofs += thislen;
-		} else {
-			/* Not enough to fill a page. Copy into buf */
-			memcpy(static_buf, buf, thislen);
-			buf = &static_buf[thislen];
-
-			while(count && thislen < 512) {
-				vecs++;
-				count--;
-				thisvecofs = min((512-thislen), vecs->iov_len);
-				memcpy(buf, vecs->iov_base, thisvecofs);
-				thislen += thisvecofs;
-				buf += thisvecofs;
-			}
-			buf = static_buf;
-		}
-		if (count && thisvecofs == vecs->iov_len) {
-			thisvecofs = 0;
-			vecs++;
-			count--;
-		}
-		ret = doc_write_ecc(mtd, to, thislen, &thisretlen, buf, eccbuf, oobsel);
-
-		totretlen += thisretlen;
-
-		if (ret || thisretlen != thislen)
-			break;
-
-		to += thislen;
-	}
-
-	mutex_unlock(&writev_buf_mutex);
-	*retlen = totretlen;
-	return ret;
-}
-
-
 static int doc_read_oob(struct mtd_info *mtd, loff_t ofs, size_t len,
 			size_t * retlen, u_char * buf)
 {
diff --git a/drivers/mtd/mtdconcat.c b/drivers/mtd/mtdconcat.c
index a5e8373349a..a6fcee2713b 100644
--- a/drivers/mtd/mtdconcat.c
+++ b/drivers/mtd/mtdconcat.c
@@ -253,9 +253,8 @@ concat_write_ecc(struct mtd_info *mtd, loff_t to, size_t len,
 }
 
 static int
-concat_writev_ecc(struct mtd_info *mtd, const struct kvec *vecs,
-		unsigned long count, loff_t to, size_t * retlen,
-		u_char *eccbuf, struct nand_oobinfo *oobsel)
+concat_writev(struct mtd_info *mtd, const struct kvec *vecs,
+		unsigned long count, loff_t to, size_t * retlen)
 {
 	struct mtd_concat *concat = CONCAT(mtd);
 	struct kvec *vecs_copy;
@@ -315,10 +314,6 @@ concat_writev_ecc(struct mtd_info *mtd, const struct kvec *vecs,
 
 		if (!(subdev->flags & MTD_WRITEABLE))
 			err = -EROFS;
-		else if (eccbuf)
-			err = subdev->writev_ecc(subdev, &vecs_copy[entry_low],
-				entry_high - entry_low + 1, to, &retsize,
-				eccbuf, oobsel);
 		else
 			err = subdev->writev(subdev, &vecs_copy[entry_low],
 				entry_high - entry_low + 1, to, &retsize);
@@ -333,8 +328,6 @@ concat_writev_ecc(struct mtd_info *mtd, const struct kvec *vecs,
 
 		*retlen += retsize;
 		total_len -= wsize;
-		if (concat->mtd.type == MTD_NANDFLASH && eccbuf)
-			eccbuf += mtd->oobavail * (wsize / mtd->writesize);
 
 		if (total_len == 0)
 			break;
@@ -348,13 +341,6 @@ concat_writev_ecc(struct mtd_info *mtd, const struct kvec *vecs,
 }
 
 static int
-concat_writev(struct mtd_info *mtd, const struct kvec *vecs,
-		unsigned long count, loff_t to, size_t * retlen)
-{
-	return concat_writev_ecc(mtd, vecs, count, to, retlen, NULL, NULL);
-}
-
-static int
 concat_read_oob(struct mtd_info *mtd, loff_t from, size_t len,
 		size_t * retlen, u_char * buf)
 {
@@ -843,8 +829,6 @@ struct mtd_info *mtd_concat_create(struct mtd_info *subdev[],	/* subdevices to c
 		concat->mtd.write_ecc = concat_write_ecc;
 	if (subdev[0]->writev)
 		concat->mtd.writev = concat_writev;
-	if (subdev[0]->writev_ecc)
-		concat->mtd.writev_ecc = concat_writev_ecc;
 	if (subdev[0]->read_oob)
 		concat->mtd.read_oob = concat_read_oob;
 	if (subdev[0]->write_oob)
diff --git a/drivers/mtd/mtdpart.c b/drivers/mtd/mtdpart.c
index 082662f9048..ae675608fa9 100644
--- a/drivers/mtd/mtdpart.c
+++ b/drivers/mtd/mtdpart.c
@@ -208,13 +208,8 @@ static int part_writev (struct mtd_info *mtd,  const struct kvec *vecs,
 	struct mtd_part *part = PART(mtd);
 	if (!(mtd->flags & MTD_WRITEABLE))
 		return -EROFS;
-	if (part->master->writev_ecc == NULL)
-		return part->master->writev (part->master, vecs, count,
+	return part->master->writev (part->master, vecs, count,
 					to + part->offset, retlen);
-	else
-		return part->master->writev_ecc (part->master, vecs, count,
-					to + part->offset, retlen,
-					NULL, &mtd->oobinfo);
 }
 
 static int part_readv (struct mtd_info *mtd,  struct kvec *vecs,
@@ -230,20 +225,6 @@ static int part_readv (struct mtd_info *mtd,  struct kvec *vecs,
 					NULL, &mtd->oobinfo);
 }
 
-static int part_writev_ecc (struct mtd_info *mtd,  const struct kvec *vecs,
-			 unsigned long count, loff_t to, size_t *retlen,
-			 u_char *eccbuf,  struct nand_oobinfo *oobsel)
-{
-	struct mtd_part *part = PART(mtd);
-	if (!(mtd->flags & MTD_WRITEABLE))
-		return -EROFS;
-	if (oobsel == NULL)
-		oobsel = &mtd->oobinfo;
-	return part->master->writev_ecc (part->master, vecs, count,
-					to + part->offset, retlen,
-					eccbuf, oobsel);
-}
-
 static int part_readv_ecc (struct mtd_info *mtd,  struct kvec *vecs,
 			 unsigned long count, loff_t from, size_t *retlen,
 			 u_char *eccbuf,  struct nand_oobinfo *oobsel)
@@ -446,8 +427,6 @@ int add_mtd_partitions(struct mtd_info *master,
 			slave->mtd.writev = part_writev;
 		if (master->readv)
 			slave->mtd.readv = part_readv;
-		if (master->writev_ecc)
-			slave->mtd.writev_ecc = part_writev_ecc;
 		if (master->readv_ecc)
 			slave->mtd.readv_ecc = part_readv_ecc;
 		if (master->lock)
diff --git a/drivers/mtd/nand/nand_base.c b/drivers/mtd/nand/nand_base.c
index 778535006c8..9aaeb3aa9d4 100644
--- a/drivers/mtd/nand/nand_base.c
+++ b/drivers/mtd/nand/nand_base.c
@@ -151,11 +151,6 @@ static int nand_write_ecc(struct mtd_info *mtd, loff_t to, size_t len,
 			  struct nand_oobinfo *oobsel);
 static int nand_write_oob(struct mtd_info *mtd, loff_t to, size_t len,
 			  size_t *retlen, const uint8_t *buf);
-static int nand_writev(struct mtd_info *mtd, const struct kvec *vecs,
-		       unsigned long count, loff_t to, size_t *retlen);
-static int nand_writev_ecc(struct mtd_info *mtd, const struct kvec *vecs,
-			   unsigned long count, loff_t to, size_t *retlen,
-			   uint8_t *eccbuf, struct nand_oobinfo *oobsel);
 static int nand_erase(struct mtd_info *mtd, struct erase_info *instr);
 static void nand_sync(struct mtd_info *mtd);
 
@@ -1857,187 +1852,6 @@ static int nand_write_oob(struct mtd_info *mtd, loff_t to, size_t len, size_t *r
 }
 
 /**
- * nand_writev - [MTD Interface] compabilty function for nand_writev_ecc
- * @mtd:	MTD device structure
- * @vecs:	the iovectors to write
- * @count:	number of vectors
- * @to:		offset to write to
- * @retlen:	pointer to variable to store the number of written bytes
- *
- * NAND write with kvec. This just calls the ecc function
- */
-static int nand_writev(struct mtd_info *mtd, const struct kvec *vecs, unsigned long count,
-		       loff_t to, size_t *retlen)
-{
-	return (nand_writev_ecc(mtd, vecs, count, to, retlen, NULL, NULL));
-}
-
-/**
- * nand_writev_ecc - [MTD Interface] write with iovec with ecc
- * @mtd:	MTD device structure
- * @vecs:	the iovectors to write
- * @count:	number of vectors
- * @to:		offset to write to
- * @retlen:	pointer to variable to store the number of written bytes
- * @eccbuf:	filesystem supplied oob data buffer
- * @oobsel:	oob selection structure
- *
- * NAND write with iovec with ecc
- */
-static int nand_writev_ecc(struct mtd_info *mtd, const struct kvec *vecs, unsigned long count,
-			   loff_t to, size_t *retlen, uint8_t *eccbuf, struct nand_oobinfo *oobsel)
-{
-	int i, page, len, total_len, ret = -EIO, written = 0, chipnr;
-	int oob, numpages, autoplace = 0, startpage;
-	struct nand_chip *this = mtd->priv;
-	int ppblock = (1 << (this->phys_erase_shift - this->page_shift));
-	uint8_t *oobbuf, *bufstart;
-
-	/* Preset written len for early exit */
-	*retlen = 0;
-
-	/* Calculate total length of data */
-	total_len = 0;
-	for (i = 0; i < count; i++)
-		total_len += (int)vecs[i].iov_len;
-
-	DEBUG(MTD_DEBUG_LEVEL3, "nand_writev: to = 0x%08x, len = %i, count = %ld\n", (unsigned int)to, (unsigned int)total_len, count);
-
-	/* Do not allow write past end of page */
-	if ((to + total_len) > mtd->size) {
-		DEBUG(MTD_DEBUG_LEVEL0, "nand_writev: Attempted write past end of device\n");
-		return -EINVAL;
-	}
-
-	/* reject writes, which are not page aligned */
-	if (NOTALIGNED(to) || NOTALIGNED(total_len)) {
-		printk(KERN_NOTICE "nand_write_ecc: Attempt to write not page aligned data\n");
-		return -EINVAL;
-	}
-
-	/* Grab the lock and see if the device is available */
-	nand_get_device(this, mtd, FL_WRITING);
-
-	/* Get the current chip-nr */
-	chipnr = (int)(to >> this->chip_shift);
-	/* Select the NAND device */
-	this->select_chip(mtd, chipnr);
-
-	/* Check, if it is write protected */
-	if (nand_check_wp(mtd))
-		goto out;
-
-	/* if oobsel is NULL, use chip defaults */
-	if (oobsel == NULL)
-		oobsel = &mtd->oobinfo;
-
-	/* Autoplace of oob data ? Use the default placement scheme */
-	if (oobsel->useecc == MTD_NANDECC_AUTOPLACE) {
-		oobsel = this->autooob;
-		autoplace = 1;
-	}
-	if (oobsel->useecc == MTD_NANDECC_AUTOPL_USR)
-		autoplace = 1;
-
-	/* Setup start page */
-	page = (int)(to >> this->page_shift);
-	/* Invalidate the page cache, if we write to the cached page */
-	if (page <= this->pagebuf && this->pagebuf < ((to + total_len) >> this->page_shift))
-		this->pagebuf = -1;
-
-	startpage = page & this->pagemask;
-
-	/* Loop until all kvec' data has been written */
-	len = 0;
-	while (count) {
-		/* If the given tuple is >= pagesize then
-		 * write it out from the iov
-		 */
-		if ((vecs->iov_len - len) >= mtd->writesize) {
-			/* Calc number of pages we can write
-			 * out of this iov in one go */
-			numpages = (vecs->iov_len - len) >> this->page_shift;
-			/* Do not cross block boundaries */
-			numpages = min(ppblock - (startpage & (ppblock - 1)), numpages);
-			oobbuf = nand_prepare_oobbuf(mtd, NULL, oobsel, autoplace, numpages);
-			bufstart = (uint8_t *) vecs->iov_base;
-			bufstart += len;
-			this->data_poi = bufstart;
-			oob = 0;
-			for (i = 1; i <= numpages; i++) {
-				/* Write one page. If this is the last page to write
-				 * then use the real pageprogram command, else select
-				 * cached programming if supported by the chip.
-				 */
-				ret = nand_write_page(mtd, this, page & this->pagemask,
-						      &oobbuf[oob], oobsel, i != numpages);
-				if (ret)
-					goto out;
-				this->data_poi += mtd->writesize;
-				len += mtd->writesize;
-				oob += mtd->oobsize;
-				page++;
-			}
-			/* Check, if we have to switch to the next tuple */
-			if (len >= (int)vecs->iov_len) {
-				vecs++;
-				len = 0;
-				count--;
-			}
-		} else {
-			/* We must use the internal buffer, read data out of each
-			 * tuple until we have a full page to write
-			 */
-			int cnt = 0;
-			while (cnt < mtd->writesize) {
-				if (vecs->iov_base != NULL && vecs->iov_len)
-					this->data_buf[cnt++] = ((uint8_t *) vecs->iov_base)[len++];
-				/* Check, if we have to switch to the next tuple */
-				if (len >= (int)vecs->iov_len) {
-					vecs++;
-					len = 0;
-					count--;
-				}
-			}
-			this->pagebuf = page;
-			this->data_poi = this->data_buf;
-			bufstart = this->data_poi;
-			numpages = 1;
-			oobbuf = nand_prepare_oobbuf(mtd, NULL, oobsel, autoplace, numpages);
-			ret = nand_write_page(mtd, this, page & this->pagemask, oobbuf, oobsel, 0);
-			if (ret)
-				goto out;
-			page++;
-		}
-
-		this->data_poi = bufstart;
-		ret = nand_verify_pages(mtd, this, startpage, numpages, oobbuf, oobsel, chipnr, 0);
-		if (ret)
-			goto out;
-
-		written += mtd->writesize * numpages;
-		/* All done ? */
-		if (!count)
-			break;
-
-		startpage = page & this->pagemask;
-		/* Check, if we cross a chip boundary */
-		if (!startpage) {
-			chipnr++;
-			this->select_chip(mtd, -1);
-			this->select_chip(mtd, chipnr);
-		}
-	}
-	ret = 0;
- out:
-	/* Deselect and wake up anyone waiting on the device */
-	nand_release_device(mtd);
-
-	*retlen = written;
-	return ret;
-}
-
-/**
  * single_erease_cmd - [GENERIC] NAND standard block erase command function
  * @mtd:	MTD device structure
  * @page:	the page address of the block which will be erased
@@ -2718,8 +2532,6 @@ int nand_scan(struct mtd_info *mtd, int maxchips)
 	mtd->read_oob = nand_read_oob;
 	mtd->write_oob = nand_write_oob;
 	mtd->readv = NULL;
-	mtd->writev = nand_writev;
-	mtd->writev_ecc = nand_writev_ecc;
 	mtd->sync = nand_sync;
 	mtd->lock = NULL;
 	mtd->unlock = NULL;
diff --git a/drivers/mtd/onenand/onenand_base.c b/drivers/mtd/onenand/onenand_base.c
index 4c2c61d54b3..8e875fa140a 100644
--- a/drivers/mtd/onenand/onenand_base.c
+++ b/drivers/mtd/onenand/onenand_base.c
@@ -1014,144 +1014,6 @@ out:
 }
 
 /**
- * onenand_writev_ecc - [MTD Interface] write with iovec with ecc
- * @param mtd		MTD device structure
- * @param vecs		the iovectors to write
- * @param count		number of vectors
- * @param to		offset to write to
- * @param retlen	pointer to variable to store the number of written bytes
- * @param eccbuf	filesystem supplied oob data buffer
- * @param oobsel	oob selection structure
- *
- * OneNAND write with iovec with ecc
- */
-static int onenand_writev_ecc(struct mtd_info *mtd, const struct kvec *vecs,
-	unsigned long count, loff_t to, size_t *retlen,
-	u_char *eccbuf, struct nand_oobinfo *oobsel)
-{
-	struct onenand_chip *this = mtd->priv;
-	unsigned char *pbuf;
-	size_t total_len, len;
-	int i, written = 0;
-	int ret = 0;
-
-	/* Preset written len for early exit */
-	*retlen = 0;
-
-	/* Calculate total length of data */
-	total_len = 0;
-	for (i = 0; i < count; i++)
-		total_len += vecs[i].iov_len;
-
-	DEBUG(MTD_DEBUG_LEVEL3, "onenand_writev_ecc: to = 0x%08x, len = %i, count = %ld\n", (unsigned int) to, (unsigned int) total_len, count);
-
-	/* Do not allow write past end of the device */
-	if (unlikely((to + total_len) > mtd->size)) {
-		DEBUG(MTD_DEBUG_LEVEL0, "onenand_writev_ecc: Attempted write past end of device\n");
-		return -EINVAL;
-	}
-
-	/* Reject writes, which are not page aligned */
-        if (unlikely(NOTALIGNED(to)) || unlikely(NOTALIGNED(total_len))) {
-                DEBUG(MTD_DEBUG_LEVEL0, "onenand_writev_ecc: Attempt to write not page aligned data\n");
-                return -EINVAL;
-        }
-
-	/* Grab the lock and see if the device is available */
-	onenand_get_device(mtd, FL_WRITING);
-
-	/* TODO handling oob */
-
-	/* Loop until all keve's data has been written */
-	len = 0;
-	while (count) {
-		pbuf = this->page_buf;
-		/*
-		 * If the given tuple is >= pagesize then
-		 * write it out from the iov
-		 */
-		if ((vecs->iov_len - len) >= mtd->writesize) {
-			pbuf = vecs->iov_base + len;
-
-			len += mtd->writesize;
-
-			/* Check, if we have to switch to the next tuple */
-			if (len >= (int) vecs->iov_len) {
-				vecs++;
-				len = 0;
-				count--;
-			}
-		} else {
-			int cnt = 0, thislen;
-			while (cnt < mtd->writesize) {
-				thislen = min_t(int, mtd->writesize - cnt, vecs->iov_len - len);
-				memcpy(this->page_buf + cnt, vecs->iov_base + len, thislen);
-				cnt += thislen;
-				len += thislen;
-
-				/* Check, if we have to switch to the next tuple */
-				if (len >= (int) vecs->iov_len) {
-					vecs++;
-					len = 0;
-					count--;
-				}
-			}
-		}
-
-		this->command(mtd, ONENAND_CMD_BUFFERRAM, to, mtd->writesize);
-
-		this->write_bufferram(mtd, ONENAND_DATARAM, pbuf, 0, mtd->writesize);
-		this->write_bufferram(mtd, ONENAND_SPARERAM, ffchars, 0, mtd->oobsize);
-
-		this->command(mtd, ONENAND_CMD_PROG, to, mtd->writesize);
-
-		onenand_update_bufferram(mtd, to, 1);
-
-		ret = this->wait(mtd, FL_WRITING);
-		if (ret) {
-			DEBUG(MTD_DEBUG_LEVEL0, "onenand_writev_ecc: write failed %d\n", ret);
-			goto out;
-		}
-
-
-		/* Only check verify write turn on */
-		ret = onenand_verify_page(mtd, (u_char *) pbuf, to);
-		if (ret) {
-			DEBUG(MTD_DEBUG_LEVEL0, "onenand_writev_ecc: verify failed %d\n", ret);
-			goto out;
-		}
-
-		written += mtd->writesize;
-
-		to += mtd->writesize;
-	}
-
-out:
-	/* Deselect and wakt up anyone waiting on the device */
-	onenand_release_device(mtd);
-
-	*retlen = written;
-
-	return 0;
-}
-
-/**
- * onenand_writev - [MTD Interface] compabilty function for onenand_writev_ecc
- * @param mtd		MTD device structure
- * @param vecs		the iovectors to write
- * @param count		number of vectors
- * @param to		offset to write to
- * @param retlen	pointer to variable to store the number of written bytes
- *
- * OneNAND write with kvec. This just calls the ecc function
- */
-static int onenand_writev(struct mtd_info *mtd, const struct kvec *vecs,
-	unsigned long count, loff_t to, size_t *retlen)
-{
-	return onenand_writev_ecc(mtd, vecs, count, to, retlen, NULL, NULL);
-}
-
-/**
  * onenand_block_checkbad - [GENERIC] Check if a block is marked bad
  * @param mtd		MTD device structure
  * @param ofs		offset from device start
@@ -1964,8 +1826,6 @@ int onenand_scan(struct mtd_info *mtd, int maxchips)
 #endif
 	mtd->readv = NULL;
 	mtd->readv_ecc = NULL;
-	mtd->writev = onenand_writev;
-	mtd->writev_ecc = onenand_writev_ecc;
 	mtd->sync = onenand_sync;
 	mtd->lock = NULL;
 	mtd->unlock = onenand_unlock;
diff --git a/include/linux/mtd/mtd.h b/include/linux/mtd/mtd.h
index d48c7492392..dba25da84ae 100644
--- a/include/linux/mtd/mtd.h
+++ b/include/linux/mtd/mtd.h
@@ -142,8 +142,6 @@ struct mtd_info {
 	int (*readv_ecc) (struct mtd_info *mtd, struct kvec *vecs, unsigned long count, loff_t from,
 		size_t *retlen, u_char *eccbuf, struct nand_oobinfo *oobsel);
 	int (*writev) (struct mtd_info *mtd, const struct kvec *vecs, unsigned long count, loff_t to, size_t *retlen);
-	int (*writev_ecc) (struct mtd_info *mtd, const struct kvec *vecs, unsigned long count, loff_t to,
-		size_t *retlen, u_char *eccbuf, struct nand_oobinfo *oobsel);
 
 	/* Sync */
 	void (*sync) (struct mtd_info *mtd);