[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>

diff --git a/drivers/mtd/onenand/onenand_base.c b/drivers/mtd/onenand/onenand_base.c
index 621c3f8ec27b85d7641dffbce3ec537d6825bd71..8006d51b7d27332433f37ac12b97cd77ddc9bbb1 100644 (file)
--- 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;