mtd: gpmi-nand: fix read page when reading to vmalloced area

The gpmi-nand driver uses virt_addr_valid() to check whether a buffer
is suitable for dma. If it's not, a driver allocated buffer is used
instead. Then after a page read the driver allocated buffer must be
copied to the user supplied buffer. This does not happen since commit
7725cc85932bd02dd12c23108e0ef748c551ccba.

This patch fixes the issue. The bug is encountered with UBI which uses a
vmalloced buffer for the volume table.

Signed-off-by: Sascha Hauer <s.hauer@pengutronix.de>
Tested-by: snijsure@grid-net.com
Acked-by: Huang Shijie <b32955@freescale.com>
Signed-off-by: Artem Bityutskiy <artem.bityutskiy@linux.intel.com>
Signed-off-by: David Woodhouse <David.Woodhouse@intel.com>

diff --git a/drivers/mtd/nand/gpmi-nand/gpmi-nand.c b/drivers/mtd/nand/gpmi-nand/gpmi-nand.c
index a05b7b444d4f1f8a92d6f0e10a2ee1db19d3c722..a6cad5caba788fe8b665270a3fc7494d7a071887 100644 (file)
--- a/drivers/mtd/nand/gpmi-nand/gpmi-nand.c
+++ b/drivers/mtd/nand/gpmi-nand/gpmi-nand.c
@@ -920,12 +920,12 @@ static int gpmi_ecc_read_page(struct mtd_info *mtd, struct nand_chip *chip,
                 */
                memset(chip->oob_poi, ~0, mtd->oobsize);
                chip->oob_poi[0] = ((uint8_t *) auxiliary_virt)[0];
-
-               read_page_swap_end(this, buf, mtd->writesize,
-                               this->payload_virt, this->payload_phys,
-                               nfc_geo->payload_size,
-                               payload_virt, payload_phys);
        }
+
+       read_page_swap_end(this, buf, mtd->writesize,
+                       this->payload_virt, this->payload_phys,
+                       nfc_geo->payload_size,
+                       payload_virt, payload_phys);
 exit_nfc:
        return ret;
 }