1 files changed, 124 insertions, 124 deletions

diff --git a/drivers/mtd/nand/nand_bbt.c b/drivers/mtd/nand/nand_bbt.c
index 7535ef53685..ca286999fe0 100644
--- a/drivers/mtd/nand/nand_bbt.c
+++ b/drivers/mtd/nand/nand_bbt.c
@@ -3,10 +3,10 @@
  *
  *  Overview:
  *   Bad block table support for the NAND driver
- *   
+ *
  *  Copyright (C) 2004 Thomas Gleixner (tglx@linutronix.de)
  *
- * $Id: nand_bbt.c,v 1.35 2005/07/15 13:53:47 gleixner Exp $
+ * $Id: nand_bbt.c,v 1.36 2005/11/07 11:14:30 gleixner Exp $
  *
  * This program is free software; you can redistribute it and/or modify
  * it under the terms of the GNU General Public License version 2 as
@@ -14,23 +14,23 @@
  *
  * Description:
  *
- * When nand_scan_bbt is called, then it tries to find the bad block table 
- * depending on the options in the bbt descriptor(s). If a bbt is found 
- * then the contents are read and the memory based bbt is created. If a 
+ * When nand_scan_bbt is called, then it tries to find the bad block table
+ * depending on the options in the bbt descriptor(s). If a bbt is found
+ * then the contents are read and the memory based bbt is created. If a
  * mirrored bbt is selected then the mirror is searched too and the
- * versions are compared. If the mirror has a greater version number 
+ * versions are compared. If the mirror has a greater version number
  * than the mirror bbt is used to build the memory based bbt.
  * If the tables are not versioned, then we "or" the bad block information.
- * If one of the bbt's is out of date or does not exist it is (re)created. 
- * If no bbt exists at all then the device is scanned for factory marked 
- * good / bad blocks and the bad block tables are created. 
+ * If one of the bbt's is out of date or does not exist it is (re)created.
+ * If no bbt exists at all then the device is scanned for factory marked
+ * good / bad blocks and the bad block tables are created.
  *
- * For manufacturer created bbts like the one found on M-SYS DOC devices 
+ * For manufacturer created bbts like the one found on M-SYS DOC devices
  * the bbt is searched and read but never created
  *
- * The autogenerated bad block table is located in the last good blocks 
- * of the device. The table is mirrored, so it can be updated eventually. 
- * The table is marked in the oob area with an ident pattern and a version 
+ * The autogenerated bad block table is located in the last good blocks
+ * of the device. The table is mirrored, so it can be updated eventually.
+ * The table is marked in the oob area with an ident pattern and a version
  * number which indicates which of both tables is more up to date.
  *
  * The table uses 2 bits per block
@@ -43,13 +43,13 @@
  * 01b:         block is marked bad due to wear
  * 10b:         block is reserved (to protect the bbt area)
  * 11b:         block is factory marked bad
- * 
+ *
  * Multichip devices like DOC store the bad block info per floor.
  *
  * Following assumptions are made:
  * - bbts start at a page boundary, if autolocated on a block boundary
  * - the space neccecary for a bbt in FLASH does not exceed a block boundary
- * 
+ *
  */
 
 #include <linux/slab.h>
@@ -62,7 +62,7 @@
 #include <linux/delay.h>
 
 
-/** 
+/**
  * check_pattern - [GENERIC] check if a pattern is in the buffer
  * @buf:        the buffer to search
  * @len:        the length of buffer to search
@@ -86,9 +86,9 @@ static int check_pattern (uint8_t *buf, int len, int paglen, struct nand_bbt_des
                         if (p[i] != 0xff)
                                 return -1;
                 }
-        }       
+        }
         p += end;
-        
+
         /* Compare the pattern */
         for (i = 0; i < td->len; i++) {
                 if (p[i] != td->pattern[i])
@@ -106,13 +106,13 @@ static int check_pattern (uint8_t *buf, int len, int paglen, struct nand_bbt_des
         return 0;
 }
 
-/** 
+/**
  * check_short_pattern - [GENERIC] check if a pattern is in the buffer
  * @buf:        the buffer to search
  * @td:         search pattern descriptor
  *
  * Check for a pattern at the given place. Used to search bad block
- * tables and good / bad block identifiers. Same as check_pattern, but 
+ * tables and good / bad block identifiers. Same as check_pattern, but
  * no optional empty check
  *
 */
@@ -142,7 +142,7 @@ static int check_short_pattern (uint8_t *buf, struct nand_bbt_descr *td)
  * Read the bad block table starting from page.
  *
  */
-static int read_bbt (struct mtd_info *mtd, uint8_t *buf, int page, int num, 
+static int read_bbt (struct mtd_info *mtd, uint8_t *buf, int page, int num,
         int bits, int offs, int reserved_block_code)
 {
         int res, i, j, act = 0;
@@ -153,7 +153,7 @@ static int read_bbt (struct mtd_info *mtd, uint8_t *buf, int page, int num,
 
         totlen = (num * bits) >> 3;
         from = ((loff_t)page) << this->page_shift;
-        
+
         while (totlen) {
                 len = min (totlen, (size_t) (1 << this->bbt_erase_shift));
                 res = mtd->read_ecc (mtd, from, len, &retlen, buf, NULL, this->autooob);
@@ -163,7 +163,7 @@ static int read_bbt (struct mtd_info *mtd, uint8_t *buf, int page, int num,
                                 return res;
                         }
                         printk (KERN_WARNING "nand_bbt: ECC error while reading bad block table\n");
-                }       
+                }
 
                 /* Analyse data */
                 for (i = 0; i < len; i++) {
@@ -183,12 +183,12 @@ static int read_bbt (struct mtd_info *mtd, uint8_t *buf, int page, int num,
                                  * message to MTD_DEBUG_LEVEL0 */
                                 printk (KERN_DEBUG "nand_read_bbt: Bad block at 0x%08x\n",
                                         ((offs << 2) + (act >> 1)) << this->bbt_erase_shift);
-                                /* Factory marked bad or worn out ? */  
+                                /* Factory marked bad or worn out ? */
                                 if (tmp == 0)
                                         this->bbt[offs + (act >> 3)] |= 0x3 << (act & 0x06);
                                 else
                                         this->bbt[offs + (act >> 3)] |= 0x1 << (act & 0x06);
-                        }       
+                        }
                 }
                 totlen -= len;
                 from += len;
@@ -200,7 +200,7 @@ static int read_bbt (struct mtd_info *mtd, uint8_t *buf, int page, int num,
  * read_abs_bbt - [GENERIC] Read the bad block table starting at a given page
  * @mtd:        MTD device structure
  * @buf:        temporary buffer
- * @td:         descriptor for the bad block table 
+ * @td:         descriptor for the bad block table
  * @chip:       read the table for a specific chip, -1 read all chips.
  *              Applies only if NAND_BBT_PERCHIP option is set
  *
@@ -235,7 +235,7 @@ static int read_abs_bbt (struct mtd_info *mtd, uint8_t *buf, struct nand_bbt_des
  * read_abs_bbts - [GENERIC] Read the bad block table(s) for all chips starting at a given page
  * @mtd:        MTD device structure
  * @buf:        temporary buffer
- * @td:         descriptor for the bad block table 
+ * @td:         descriptor for the bad block table
  * @md:         descriptor for the bad block table mirror
  *
  * Read the bad block table(s) for all chips starting at a given page
@@ -247,16 +247,16 @@ static int read_abs_bbts (struct mtd_info *mtd, uint8_t *buf, struct nand_bbt_de
 {
         struct nand_chip *this = mtd->priv;
 
-        /* Read the primary version, if available */    
+        /* Read the primary version, if available */
         if (td->options & NAND_BBT_VERSION) {
-                nand_read_raw (mtd, buf, td->pages[0] << this->page_shift, mtd->oobblock, mtd->oobsize); 
+                nand_read_raw (mtd, buf, td->pages[0] << this->page_shift, mtd->oobblock, mtd->oobsize);
                 td->version[0] = buf[mtd->oobblock + td->veroffs];
                 printk (KERN_DEBUG "Bad block table at page %d, version 0x%02X\n", td->pages[0], td->version[0]);
         }
 
-        /* Read the mirror version, if available */     
+        /* Read the mirror version, if available */
         if (md && (md->options & NAND_BBT_VERSION)) {
-                nand_read_raw (mtd, buf, md->pages[0] << this->page_shift, mtd->oobblock, mtd->oobsize); 
+                nand_read_raw (mtd, buf, md->pages[0] << this->page_shift, mtd->oobblock, mtd->oobsize);
                 md->version[0] = buf[mtd->oobblock + md->veroffs];
                 printk (KERN_DEBUG "Bad block table at page %d, version 0x%02X\n", md->pages[0], md->version[0]);
         }
@@ -290,7 +290,7 @@ static int create_bbt (struct mtd_info *mtd, uint8_t *buf, struct nand_bbt_descr
         else {
                 if (bd->options & NAND_BBT_SCAN2NDPAGE)
                         len = 2;
-                else    
+                else
                         len = 1;
         }
 
@@ -322,10 +322,10 @@ static int create_bbt (struct mtd_info *mtd, uint8_t *buf, struct nand_bbt_descr
                 numblocks += startblock;
                 from = startblock << (this->bbt_erase_shift - 1);
         }
-        
+
         for (i = startblock; i < numblocks;) {
                 int ret;
-                
+
                 if (bd->options & NAND_BBT_SCANEMPTY)
                         if ((ret = nand_read_raw (mtd, buf, from, readlen, ooblen)))
                                 return ret;
@@ -333,8 +333,8 @@ static int create_bbt (struct mtd_info *mtd, uint8_t *buf, struct nand_bbt_descr
                 for (j = 0; j < len; j++) {
                         if (!(bd->options & NAND_BBT_SCANEMPTY)) {
                                 size_t retlen;
-                                
-                                /* Read the full oob until read_oob is fixed to 
+
+                                /* Read the full oob until read_oob is fixed to
                                  * handle single byte reads for 16 bit buswidth */
                                 ret = mtd->read_oob(mtd, from + j * mtd->oobblock,
                                                         mtd->oobsize, &retlen, buf);
@@ -343,14 +343,14 @@ static int create_bbt (struct mtd_info *mtd, uint8_t *buf, struct nand_bbt_descr
 
                                 if (check_short_pattern (buf, bd)) {
                                         this->bbt[i >> 3] |= 0x03 << (i & 0x6);
-                                        printk (KERN_WARNING "Bad eraseblock %d at 0x%08x\n", 
+                                        printk (KERN_WARNING "Bad eraseblock %d at 0x%08x\n",
                                                 i >> 1, (unsigned int) from);
                                         break;
                                 }
                         } else {
                                 if (check_pattern (&buf[j * scanlen], scanlen, mtd->oobblock, bd)) {
                                         this->bbt[i >> 3] |= 0x03 << (i & 0x6);
-                                        printk (KERN_WARNING "Bad eraseblock %d at 0x%08x\n", 
+                                        printk (KERN_WARNING "Bad eraseblock %d at 0x%08x\n",
                                                 i >> 1, (unsigned int) from);
                                         break;
                                 }
@@ -369,15 +369,15 @@ static int create_bbt (struct mtd_info *mtd, uint8_t *buf, struct nand_bbt_descr
  * @td:         descriptor for the bad block table
  *
  * Read the bad block table by searching for a given ident pattern.
- * Search is preformed either from the beginning up or from the end of 
+ * Search is preformed either from the beginning up or from the end of
  * the device downwards. The search starts always at the start of a
  * block.
- * If the option NAND_BBT_PERCHIP is given, each chip is searched 
+ * If the option NAND_BBT_PERCHIP is given, each chip is searched
  * for a bbt, which contains the bad block information of this chip.
  * This is neccecary to provide support for certain DOC devices.
  *
- * The bbt ident pattern resides in the oob area of the first page 
- * in a block. 
+ * The bbt ident pattern resides in the oob area of the first page
+ * in a block.
  */
 static int search_bbt (struct mtd_info *mtd, uint8_t *buf, struct nand_bbt_descr *td)
 {
@@ -392,10 +392,10 @@ static int search_bbt (struct mtd_info *mtd, uint8_t *buf, struct nand_bbt_descr
                 startblock = (mtd->size >> this->bbt_erase_shift) -1;
                 dir = -1;
         } else {
-                startblock = 0; 
+                startblock = 0;
                 dir = 1;
-        }       
-        
+        }
+
         /* Do we have a bbt per chip ? */
         if (td->options & NAND_BBT_PERCHIP) {
                 chips = this->numchips;
@@ -405,19 +405,19 @@ static int search_bbt (struct mtd_info *mtd, uint8_t *buf, struct nand_bbt_descr
                 chips = 1;
                 bbtblocks = mtd->size >> this->bbt_erase_shift;
         }
-        
+
         /* Number of bits for each erase block in the bbt */
         bits = td->options & NAND_BBT_NRBITS_MSK;
-        
+
         for (i = 0; i < chips; i++) {
                 /* Reset version information */
-                td->version[i] = 0;     
+                td->version[i] = 0;
                 td->pages[i] = -1;
                 /* Scan the maximum number of blocks */
                 for (block = 0; block < td->maxblocks; block++) {
                         int actblock = startblock + dir * block;
                         /* Read first page */
-                        nand_read_raw (mtd, buf, actblock << this->bbt_erase_shift, mtd->oobblock, mtd->oobsize); 
+                        nand_read_raw (mtd, buf, actblock << this->bbt_erase_shift, mtd->oobblock, mtd->oobsize);
                         if (!check_pattern(buf, scanlen, mtd->oobblock, td)) {
                                 td->pages[i] = actblock << (this->bbt_erase_shift - this->page_shift);
                                 if (td->options & NAND_BBT_VERSION) {
@@ -435,46 +435,46 @@ static int search_bbt (struct mtd_info *mtd, uint8_t *buf, struct nand_bbt_descr
                 else
                         printk (KERN_DEBUG "Bad block table found at page %d, version 0x%02X\n", td->pages[i], td->version[i]);
         }
-        return 0;       
+        return 0;
 }
 
 /**
  * search_read_bbts - [GENERIC] scan the device for bad block table(s)
  * @mtd:        MTD device structure
  * @buf:        temporary buffer
- * @td:         descriptor for the bad block table 
+ * @td:         descriptor for the bad block table
  * @md:         descriptor for the bad block table mirror
  *
  * Search and read the bad block table(s)
 */
-static int search_read_bbts (struct mtd_info *mtd, uint8_t *buf, 
+static int search_read_bbts (struct mtd_info *mtd, uint8_t *buf,
         struct nand_bbt_descr *td, struct nand_bbt_descr *md)
 {
         /* Search the primary table */
         search_bbt (mtd, buf, td);
-                
+
         /* Search the mirror table */
         if (md)
                 search_bbt (mtd, buf, md);
-        
+
         /* Force result check */
-        return 1;       
+        return 1;
 }
-        
 
-/** 
+
+/**
  * write_bbt - [GENERIC] (Re)write the bad block table
  *
  * @mtd:        MTD device structure
  * @buf:        temporary buffer
- * @td:         descriptor for the bad block table 
+ * @td:         descriptor for the bad block table
  * @md:         descriptor for the bad block table mirror
  * @chipsel:    selector for a specific chip, -1 for all
  *
  * (Re)write the bad block table
  *
 */
-static int write_bbt (struct mtd_info *mtd, uint8_t *buf, 
+static int write_bbt (struct mtd_info *mtd, uint8_t *buf,
         struct nand_bbt_descr *td, struct nand_bbt_descr *md, int chipsel)
 {
         struct nand_chip *this = mtd->priv;
@@ -493,7 +493,7 @@ static int write_bbt (struct mtd_info *mtd, uint8_t *buf,
         /* Write bad block table per chip rather than per device ? */
         if (td->options & NAND_BBT_PERCHIP) {
                 numblocks = (int) (this->chipsize >> this->bbt_erase_shift);
-                /* Full device write or specific chip ? */      
+                /* Full device write or specific chip ? */
                 if (chipsel == -1) {
                         nrchips = this->numchips;
                 } else {
@@ -503,19 +503,19 @@ static int write_bbt (struct mtd_info *mtd, uint8_t *buf,
         } else {
                 numblocks = (int) (mtd->size >> this->bbt_erase_shift);
                 nrchips = 1;
-        }       
-        
+        }
+
         /* Loop through the chips */
         for (; chip < nrchips; chip++) {
-                
-                /* There was already a version of the table, reuse the page 
-                 * This applies for absolute placement too, as we have the 
+
+                /* There was already a version of the table, reuse the page
+                 * This applies for absolute placement too, as we have the
                  * page nr. in td->pages.
                  */
                 if (td->pages[chip] != -1) {
                         page = td->pages[chip];
                         goto write;
-                }       
+                }
 
                 /* Automatic placement of the bad block table */
                 /* Search direction top -> down ? */
@@ -525,7 +525,7 @@ static int write_bbt (struct mtd_info *mtd, uint8_t *buf,
                 } else {
                         startblock = chip * numblocks;
                         dir = 1;
-                }       
+                }
 
                 for (i = 0; i < td->maxblocks; i++) {
                         int block = startblock + dir * i;
@@ -542,7 +542,7 @@ static int write_bbt (struct mtd_info *mtd, uint8_t *buf,
                 }
                 printk (KERN_ERR "No space left to write bad block table\n");
                 return -ENOSPC;
-write:  
+write:
 
                 /* Set up shift count and masks for the flash table */
                 bits = td->options & NAND_BBT_NRBITS_MSK;
@@ -553,14 +553,14 @@ write:
                 case 8: sft = 0; sftmsk = 0x00; msk[0] = 0x00; msk[1] = 0x0F; msk[2] = ~rcode; msk[3] = 0xff; break;
                 default: return -EINVAL;
                 }
-                
+
                 bbtoffs = chip * (numblocks >> 2);
-                
+
                 to = ((loff_t) page) << this->page_shift;
 
                 memcpy (&oobinfo, this->autooob, sizeof(oobinfo));
                 oobinfo.useecc = MTD_NANDECC_PLACEONLY;
-                
+
                 /* Must we save the block contents ? */
                 if (td->options & NAND_BBT_SAVECONTENT) {
                         /* Make it block aligned */
@@ -599,7 +599,7 @@ write:
                                 buf[len + td->veroffs] = td->version[chip];
                         }
                 }
-        
+
                 /* walk through the memory table */
                 for (i = 0; i < numblocks; ) {
                         uint8_t dat;
@@ -611,7 +611,7 @@ write:
                                 dat >>= 2;
                         }
                 }
-                
+
                 memset (&einfo, 0, sizeof (einfo));
                 einfo.mtd = mtd;
                 einfo.addr = (unsigned long) to;
@@ -621,18 +621,18 @@ write:
                         printk (KERN_WARNING "nand_bbt: Error during block erase: %d\n", res);
                         return res;
                 }
-        
+
                 res = mtd->write_ecc (mtd, to, len, &retlen, buf, &buf[len], &oobinfo);
                 if (res < 0) {
                         printk (KERN_WARNING "nand_bbt: Error while writing bad block table %d\n", res);
                         return res;
                 }
-                printk (KERN_DEBUG "Bad block table written to 0x%08x, version 0x%02X\n", 
+                printk (KERN_DEBUG "Bad block table written to 0x%08x, version 0x%02X\n",
                         (unsigned int) to, td->version[chip]);
-        
+
                 /* Mark it as used */
                 td->pages[chip] = page;
-        }       
+        }
         return 0;
 }
 
@@ -641,7 +641,7 @@ write:
  * @mtd:        MTD device structure
  * @bd:         descriptor for the good/bad block search pattern
  *
- * The function creates a memory based bbt by scanning the device 
+ * The function creates a memory based bbt by scanning the device
  * for manufacturer / software marked good / bad blocks
 */
 static inline int nand_memory_bbt (struct mtd_info *mtd, struct nand_bbt_descr *bd)
@@ -673,11 +673,11 @@ static int check_create (struct mtd_info *mtd, uint8_t *buf, struct nand_bbt_des
         struct nand_bbt_descr *rd, *rd2;
 
         /* Do we have a bbt per chip ? */
-        if (td->options & NAND_BBT_PERCHIP) 
+        if (td->options & NAND_BBT_PERCHIP)
                 chips = this->numchips;
-        else 
+        else
                 chips = 1;
-        
+
         for (i = 0; i < chips; i++) {
                 writeops = 0;
                 rd = NULL;
@@ -692,7 +692,7 @@ static int check_create (struct mtd_info *mtd, uint8_t *buf, struct nand_bbt_des
                         }
 
                         if (td->pages[i] == -1) {
-                                rd = md;                                
+                                rd = md;
                                 td->version[i] = md->version[i];
                                 writeops = 1;
                                 goto writecheck;
@@ -710,7 +710,7 @@ static int check_create (struct mtd_info *mtd, uint8_t *buf, struct nand_bbt_des
                                 if (!(td->options & NAND_BBT_VERSION))
                                         rd2 = md;
                                 goto writecheck;
-                        }       
+                        }
 
                         if (((int8_t) (td->version[i] - md->version[i])) > 0) {
                                 rd = td;
@@ -735,15 +735,15 @@ static int check_create (struct mtd_info *mtd, uint8_t *buf, struct nand_bbt_des
 create:
                 /* Create the bad block table by scanning the device ? */
                 if (!(td->options & NAND_BBT_CREATE))
-                        continue;       
-                
+                        continue;
+
                 /* Create the table in memory by scanning the chip(s) */
                 create_bbt (mtd, buf, bd, chipsel);
-                
+
                 td->version[i] = 1;
                 if (md)
-                        md->version[i] = 1;     
-writecheck:     
+                        md->version[i] = 1;
+writecheck:
                 /* read back first ? */
                 if (rd)
                         read_abs_bbt (mtd, buf, rd, chipsel);
@@ -757,7 +757,7 @@ writecheck:
                         if (res < 0)
                                 return res;
                 }
-                
+
                 /* Write the mirror bad block table to the device ? */
                 if ((writeops & 0x02) && md && (md->options & NAND_BBT_WRITE)) {
                         res = write_bbt (mtd, buf, md, td, chipsel);
@@ -765,11 +765,11 @@ writecheck:
                                 return res;
                 }
         }
-        return 0;       
+        return 0;
 }
 
 /**
- * mark_bbt_regions - [GENERIC] mark the bad block table regions 
+ * mark_bbt_regions - [GENERIC] mark the bad block table regions
  * @mtd:        MTD device structure
  * @td:         bad block table descriptor
  *
@@ -790,14 +790,14 @@ static void mark_bbt_region (struct mtd_info *mtd, struct nand_bbt_descr *td)
         } else {
                 chips = 1;
                 nrblocks = (int)(mtd->size >> this->bbt_erase_shift);
-        }       
-        
+        }
+
         for (i = 0; i < chips; i++) {
                 if ((td->options & NAND_BBT_ABSPAGE) ||
                     !(td->options & NAND_BBT_WRITE)) {
                         if (td->pages[i] == -1) continue;
                         block = td->pages[i] >> (this->bbt_erase_shift - this->page_shift);
-                        block <<= 1;            
+                        block <<= 1;
                         oldval = this->bbt[(block >> 3)];
                         newval = oldval | (0x2 << (block & 0x06));
                         this->bbt[(block >> 3)] = newval;
@@ -808,16 +808,16 @@ static void mark_bbt_region (struct mtd_info *mtd, struct nand_bbt_descr *td)
                 update = 0;
                 if (td->options & NAND_BBT_LASTBLOCK)
                         block = ((i + 1) * nrblocks) - td->maxblocks;
-                else    
+                else
                         block = i * nrblocks;
-                block <<= 1;    
+                block <<= 1;
                 for (j = 0; j < td->maxblocks; j++) {
                         oldval = this->bbt[(block >> 3)];
                         newval = oldval | (0x2 << (block & 0x06));
                         this->bbt[(block >> 3)] = newval;
                         if (oldval != newval) update = 1;
                         block += 2;
-                }       
+                }
                 /* If we want reserved blocks to be recorded to flash, and some
                    new ones have been marked, then we need to update the stored
                    bbts.  This should only happen once. */
@@ -831,7 +831,7 @@ static void mark_bbt_region (struct mtd_info *mtd, struct nand_bbt_descr *td)
  * @mtd:        MTD device structure
  * @bd:         descriptor for the good/bad block search pattern
  *
- * The function checks, if a bad block table(s) is/are already 
+ * The function checks, if a bad block table(s) is/are already
  * available. If not it scans the device for manufacturer
  * marked good / bad blocks and writes the bad block table(s) to
  * the selected place.
@@ -880,30 +880,30 @@ int nand_scan_bbt (struct mtd_info *mtd, struct nand_bbt_descr *bd)
                 this->bbt = NULL;
                 return -ENOMEM;
         }
-        
+
         /* Is the bbt at a given page ? */
         if (td->options & NAND_BBT_ABSPAGE) {
                 res = read_abs_bbts (mtd, buf, td, md);
-        } else {        
+        } else {
                 /* Search the bad block table using a pattern in oob */
                 res = search_read_bbts (mtd, buf, td, md);
-        }       
+        }
 
-        if (res) 
+        if (res)
                 res = check_create (mtd, buf, bd);
-        
+
         /* Prevent the bbt regions from erasing / writing */
         mark_bbt_region (mtd, td);
         if (md)
                 mark_bbt_region (mtd, md);
-        
+
         kfree (buf);
         return res;
 }
 
 
 /**
- * nand_update_bbt - [NAND Interface] update bad block table(s) 
+ * nand_update_bbt - [NAND Interface] update bad block table(s)
  * @mtd:        MTD device structure
  * @offs:       the offset of the newly marked block
  *
@@ -930,7 +930,7 @@ int nand_update_bbt (struct mtd_info *mtd, loff_t offs)
                 printk (KERN_ERR "nand_update_bbt: Out of memory\n");
                 return -ENOMEM;
         }
-        
+
         writeops = md != NULL ? 0x03 : 0x01;
 
         /* Do we have a bbt per chip ? */
@@ -944,7 +944,7 @@ int nand_update_bbt (struct mtd_info *mtd, loff_t offs)
 
         td->version[chip]++;
         if (md)
-                md->version[chip]++;    
+                md->version[chip]++;
 
         /* Write the bad block table to the device ? */
         if ((writeops & 0x01) && (td->options & NAND_BBT_WRITE)) {
@@ -957,12 +957,12 @@ int nand_update_bbt (struct mtd_info *mtd, loff_t offs)
                 res = write_bbt (mtd, buf, md, td, chipsel);
         }
 
-out:    
+out:
         kfree (buf);
         return res;
 }
 
-/* Define some generic bad / good block scan pattern which are used 
+/* Define some generic bad / good block scan pattern which are used
  * while scanning a device for factory marked good / bad blocks. */
 static uint8_t scan_ff_pattern[] = { 0xff, 0xff };
 
@@ -1009,7 +1009,7 @@ static uint8_t bbt_pattern[] = {'B', 'b', 't', '0' };
 static uint8_t mirror_pattern[] = {'1', 't', 'b', 'B' };
 
 static struct nand_bbt_descr bbt_main_descr = {
-        .options = NAND_BBT_LASTBLOCK | NAND_BBT_CREATE | NAND_BBT_WRITE 
+        .options = NAND_BBT_LASTBLOCK | NAND_BBT_CREATE | NAND_BBT_WRITE
                 | NAND_BBT_2BIT | NAND_BBT_VERSION | NAND_BBT_PERCHIP,
         .offs = 8,
         .len = 4,
@@ -1019,7 +1019,7 @@ static struct nand_bbt_descr bbt_main_descr = {
 };
 
 static struct nand_bbt_descr bbt_mirror_descr = {
-        .options = NAND_BBT_LASTBLOCK | NAND_BBT_CREATE | NAND_BBT_WRITE 
+        .options = NAND_BBT_LASTBLOCK | NAND_BBT_CREATE | NAND_BBT_WRITE
                 | NAND_BBT_2BIT | NAND_BBT_VERSION | NAND_BBT_PERCHIP,
         .offs = 8,
         .len = 4,
@@ -1029,7 +1029,7 @@ static struct nand_bbt_descr bbt_mirror_descr = {
 };
 
 /**
- * nand_default_bbt - [NAND Interface] Select a default bad block table for the device 
+ * nand_default_bbt - [NAND Interface] Select a default bad block table for the device
  * @mtd:        MTD device structure
  *
  * This function selects the default bad block table
@@ -1039,29 +1039,29 @@ static struct nand_bbt_descr bbt_mirror_descr = {
 int nand_default_bbt (struct mtd_info *mtd)
 {
         struct nand_chip *this = mtd->priv;
-        
-        /* Default for AG-AND. We must use a flash based 
+
+        /* Default for AG-AND. We must use a flash based
          * bad block table as the devices have factory marked
          * _good_ blocks. Erasing those blocks leads to loss
          * of the good / bad information, so we _must_ store
-         * this information in a good / bad table during 
+         * this information in a good / bad table during
          * startup
         */
         if (this->options & NAND_IS_AND) {
                 /* Use the default pattern descriptors */
-                if (!this->bbt_td) {    
+                if (!this->bbt_td) {
                         this->bbt_td = &bbt_main_descr;
                         this->bbt_md = &bbt_mirror_descr;
-                }       
+                }
                 this->options |= NAND_USE_FLASH_BBT;
                 return nand_scan_bbt (mtd, &agand_flashbased);
         }
-        
-        
+
+
         /* Is a flash based bad block table requested ? */
         if (this->options & NAND_USE_FLASH_BBT) {
-                /* Use the default pattern descriptors */       
-                if (!this->bbt_td) {    
+                /* Use the default pattern descriptors */
+                if (!this->bbt_td) {
                         this->bbt_td = &bbt_main_descr;
                         this->bbt_md = &bbt_mirror_descr;
                 }
@@ -1081,7 +1081,7 @@ int nand_default_bbt (struct mtd_info *mtd)
 }
 
 /**
- * nand_isbad_bbt - [NAND Interface] Check if a block is bad 
+ * nand_isbad_bbt - [NAND Interface] Check if a block is bad
  * @mtd:        MTD device structure
  * @offs:       offset in the device
  * @allowbbt:   allow access to bad block table region
@@ -1092,12 +1092,12 @@ int nand_isbad_bbt (struct mtd_info *mtd, loff_t offs, int allowbbt)
         struct nand_chip *this = mtd->priv;
         int block;
         uint8_t res;
-        
+
         /* Get block number * 2 */
         block = (int) (offs >> (this->bbt_erase_shift - 1));
         res = (this->bbt[block >> 3] >> (block & 0x06)) & 0x03;
 
-        DEBUG (MTD_DEBUG_LEVEL2, "nand_isbad_bbt(): bbt info for offs 0x%08x: (block %d) 0x%02x\n", 
+        DEBUG (MTD_DEBUG_LEVEL2, "nand_isbad_bbt(): bbt info for offs 0x%08x: (block %d) 0x%02x\n",
                 (unsigned int)offs, block >> 1, res);
 
         switch ((int)res) {