mtd: onenand: allocate verify buffer in the core

This patch extends OneNAND core code with support for OneNAND verify
write check. This is done by allocating the buffer for verify read
directly from the core code.

Signed-off-by: Kyungmin Park <kyungmin.park@samsung.com>
Signed-off-by: Marek Szyprowski <m.szyprowski@samsung.com>
Signed-off-by: David Woodhouse <David.Woodhouse@intel.com>

diff --git a/drivers/mtd/onenand/onenand_base.c b/drivers/mtd/onenand/onenand_base.c
index 1b26f50e159a783785aa54564dc550c04fd7e0c2..045811f2149789e4653c68ea9888c9466f228220 100644 (file)
--- a/drivers/mtd/onenand/onenand_base.c
+++ b/drivers/mtd/onenand/onenand_base.c
@@ -3932,6 +3932,13 @@ int onenand_scan(struct mtd_info *mtd, int maxchips)
                                __func__);
                        return -ENOMEM;
                }
+#ifdef CONFIG_MTD_ONENAND_VERIFY_WRITE
+               this->verify_buf = kzalloc(mtd->writesize, GFP_KERNEL);
+               if (!this->verify_buf) {
+                       kfree(this->page_buf);
+                       return -ENOMEM;
+               }
+#endif
                this->options |= ONENAND_PAGEBUF_ALLOC;
        }
        if (!this->oob_buf) {
@@ -4059,8 +4066,12 @@ void onenand_release(struct mtd_info *mtd)
                kfree(this->bbm);
        }
        /* Buffers allocated by onenand_scan */
-       if (this->options & ONENAND_PAGEBUF_ALLOC)
+       if (this->options & ONENAND_PAGEBUF_ALLOC) {
                kfree(this->page_buf);
+#ifdef CONFIG_MTD_ONENAND_VERIFY_WRITE
+               kfree(this->verify_buf);
+#endif
+       }
        if (this->options & ONENAND_OOBBUF_ALLOC)
                kfree(this->oob_buf);
        kfree(mtd->eraseregions);

diff --git a/include/linux/mtd/onenand.h b/include/linux/mtd/onenand.h
index c9a3c3596b68d7450686d6df5836dab5bc5af538..9b43268224a78ad1349ac36eadcae20589d9d174 100644 (file)
--- a/include/linux/mtd/onenand.h
+++ b/include/linux/mtd/onenand.h
@@ -125,6 +125,9 @@ struct onenand_chip {
        flstate_t               state;
        unsigned char           *page_buf;
        unsigned char           *oob_buf;
+#ifdef CONFIG_MTD_ONENAND_VERIFY_WRITE
+       unsigned char           *verify_buf;
+#endif
 
        int                     subpagesize;
        struct nand_ecclayout   *ecclayout;