[MTD] [OneNAND] Use oob buffer instead of main one in oob functions

In oob functions, it is used main buffer instead of oob one. So fix it.

Signed-off-by: Kyungmin Park <kyungmin.park@samsung.com>
Signed-off-by: David Woodhouse <dwmw2@infradead.org>

1 files changed, 13 insertions, 10 deletions

diff --git a/drivers/mtd/onenand/onenand_base.c b/drivers/mtd/onenand/onenand_base.c
index 621c3f8ec27b..8006d51b7d27 100644
--- a/drivers/mtd/onenand/onenand_base.c
+++ b/drivers/mtd/onenand/onenand_base.c
@@ -1093,7 +1093,7 @@ int onenand_bbt_read_oob(struct mtd_info *mtd, loff_t from,
 static int onenand_verify_oob(struct mtd_info *mtd, const u_char *buf, loff_t to)
 {
         struct onenand_chip *this = mtd->priv;
-        char *readp = this->page_buf + mtd->writesize;
+        char oobbuf[64];
         int status, i;
 
         this->command(mtd, ONENAND_CMD_READOOB, to, mtd->oobsize);
@@ -1102,9 +1102,9 @@ static int onenand_verify_oob(struct mtd_info *mtd, const u_char *buf, loff_t to
         if (status)
                 return status;
 
-        this->read_bufferram(mtd, ONENAND_SPARERAM, readp, 0, mtd->oobsize);
-        for(i = 0; i < mtd->oobsize; i++)
-                if (buf[i] != 0xFF && buf[i] != readp[i])
+        this->read_bufferram(mtd, ONENAND_SPARERAM, oobbuf, 0, mtd->oobsize);
+        for (i = 0; i < mtd->oobsize; i++)
+                if (buf[i] != 0xFF && buf[i] != oobbuf[i])
                         return -EBADMSG;
 
         return 0;
@@ -1312,6 +1312,7 @@ static int onenand_do_write_oob(struct mtd_info *mtd, loff_t to, size_t len,
         struct onenand_chip *this = mtd->priv;
         int column, ret = 0, oobsize;
         int written = 0;
+        u_char *oobbuf;
 
         DEBUG(MTD_DEBUG_LEVEL3, "onenand_write_oob: to = 0x%08x, len = %i\n", (unsigned int) to, (int) len);
 
@@ -1331,7 +1332,7 @@ static int onenand_do_write_oob(struct mtd_info *mtd, loff_t to, size_t len,
         }
 
         /* For compatibility with NAND: Do not allow write past end of page */
-        if (column + len > oobsize) {
+        if (unlikely(column + len > oobsize)) {
                 printk(KERN_ERR "onenand_write_oob: "
                       "Attempt to write past end of page\n");
                 return -EINVAL;
@@ -1348,6 +1349,8 @@ static int onenand_do_write_oob(struct mtd_info *mtd, loff_t to, size_t len,
         /* Grab the lock and see if the device is available */
         onenand_get_device(mtd, FL_WRITING);
 
+        oobbuf = this->page_buf + mtd->writesize;
+
         /* Loop until all data write */
         while (written < len) {
                 int thislen = min_t(int, oobsize, len - written);
@@ -1358,12 +1361,12 @@ static int onenand_do_write_oob(struct mtd_info *mtd, loff_t to, size_t len,
 
                 /* We send data to spare ram with oobsize
                  * to prevent byte access */
-                memset(this->page_buf, 0xff, mtd->oobsize);
+                memset(oobbuf, 0xff, mtd->oobsize);
                 if (mode == MTD_OOB_AUTO)
-                        onenand_fill_auto_oob(mtd, this->page_buf, buf, column, thislen);
+                        onenand_fill_auto_oob(mtd, oobbuf, buf, column, thislen);
                 else
-                        memcpy(this->page_buf + column, buf, thislen);
-                this->write_bufferram(mtd, ONENAND_SPARERAM, this->page_buf, 0, mtd->oobsize);
+                        memcpy(oobbuf + column, buf, thislen);
+                this->write_bufferram(mtd, ONENAND_SPARERAM, oobbuf, 0, mtd->oobsize);
 
                 this->command(mtd, ONENAND_CMD_PROGOOB, to, mtd->oobsize);
 
@@ -1375,7 +1378,7 @@ static int onenand_do_write_oob(struct mtd_info *mtd, loff_t to, size_t len,
                         break;
                 }
 
-                ret = onenand_verify_oob(mtd, this->page_buf, to);
+                ret = onenand_verify_oob(mtd, oobbuf, to);
                 if (ret) {
                         printk(KERN_ERR "onenand_write_oob: verify failed %d\n", ret);
                         break;