Merge tag 'for-linus-20120712' of git://git.infradead.org/linux-mtd

Pull late MTD fixes from David Woodhouse:
 - fix 'sparse warning fix' regression which totally breaks MXC NAND
 - fix GPMI NAND regression when used with UBI
 - update/correct sysfs documentation for new 'bitflip_threshold' field
 - fix nandsim build failure

* tag 'for-linus-20120712' of git://git.infradead.org/linux-mtd:
  mtd: nandsim: don't open code a do_div helper
  mtd: ABI documentation: clarification of bitflip_threshold
  mtd: gpmi-nand: fix read page when reading to vmalloced area
  mtd: mxc_nand: use 32bit copy functions

3 files changed, 37 insertions, 22 deletions

diff --git a/drivers/mtd/nand/gpmi-nand/gpmi-nand.c b/drivers/mtd/nand/gpmi-nand/gpmi-nand.c
index a05b7b444d4f..a6cad5caba78 100644
--- 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;
 }
diff --git a/drivers/mtd/nand/mxc_nand.c b/drivers/mtd/nand/mxc_nand.c
index c58e6a93f445..6acc790c2fbb 100644
--- a/drivers/mtd/nand/mxc_nand.c
+++ b/drivers/mtd/nand/mxc_nand.c
@@ -273,6 +273,26 @@ static struct nand_ecclayout nandv2_hw_eccoob_4k = {
 
 static const char *part_probes[] = { "RedBoot", "cmdlinepart", "ofpart", NULL };
 
+static void memcpy32_fromio(void *trg, const void __iomem  *src, size_t size)
+{
+        int i;
+        u32 *t = trg;
+        const __iomem u32 *s = src;
+
+        for (i = 0; i < (size >> 2); i++)
+                *t++ = __raw_readl(s++);
+}
+
+static void memcpy32_toio(void __iomem *trg, const void *src, int size)
+{
+        int i;
+        u32 __iomem *t = trg;
+        const u32 *s = src;
+
+        for (i = 0; i < (size >> 2); i++)
+                __raw_writel(*s++, t++);
+}
+
 static int check_int_v3(struct mxc_nand_host *host)
 {
         uint32_t tmp;
@@ -519,7 +539,7 @@ static void send_read_id_v3(struct mxc_nand_host *host)
 
         wait_op_done(host, true);
 
-        memcpy_fromio(host->data_buf, host->main_area0, 16);
+        memcpy32_fromio(host->data_buf, host->main_area0, 16);
 }
 
 /* Request the NANDFC to perform a read of the NAND device ID. */
@@ -535,7 +555,7 @@ static void send_read_id_v1_v2(struct mxc_nand_host *host)
         /* Wait for operation to complete */
         wait_op_done(host, true);
 
-        memcpy_fromio(host->data_buf, host->main_area0, 16);
+        memcpy32_fromio(host->data_buf, host->main_area0, 16);
 
         if (this->options & NAND_BUSWIDTH_16) {
                 /* compress the ID info */
@@ -797,16 +817,16 @@ static void copy_spare(struct mtd_info *mtd, bool bfrom)
 
         if (bfrom) {
                 for (i = 0; i < n - 1; i++)
-                        memcpy_fromio(d + i * j, s + i * t, j);
+                        memcpy32_fromio(d + i * j, s + i * t, j);
 
                 /* the last section */
-                memcpy_fromio(d + i * j, s + i * t, mtd->oobsize - i * j);
+                memcpy32_fromio(d + i * j, s + i * t, mtd->oobsize - i * j);
         } else {
                 for (i = 0; i < n - 1; i++)
-                        memcpy_toio(&s[i * t], &d[i * j], j);
+                        memcpy32_toio(&s[i * t], &d[i * j], j);
 
                 /* the last section */
-                memcpy_toio(&s[i * t], &d[i * j], mtd->oobsize - i * j);
+                memcpy32_toio(&s[i * t], &d[i * j], mtd->oobsize - i * j);
         }
 }
 
@@ -1070,7 +1090,8 @@ static void mxc_nand_command(struct mtd_info *mtd, unsigned command,
 
                 host->devtype_data->send_page(mtd, NFC_OUTPUT);
 
-                memcpy_fromio(host->data_buf, host->main_area0, mtd->writesize);
+                memcpy32_fromio(host->data_buf, host->main_area0,
+                                mtd->writesize);
                 copy_spare(mtd, true);
                 break;
 
@@ -1086,7 +1107,7 @@ static void mxc_nand_command(struct mtd_info *mtd, unsigned command,
                 break;
 
         case NAND_CMD_PAGEPROG:
-                memcpy_toio(host->main_area0, host->data_buf, mtd->writesize);
+                memcpy32_toio(host->main_area0, host->data_buf, mtd->writesize);
                 copy_spare(mtd, false);
                 host->devtype_data->send_page(mtd, NFC_INPUT);
                 host->devtype_data->send_cmd(host, command, true);
diff --git a/drivers/mtd/nand/nandsim.c b/drivers/mtd/nand/nandsim.c
index 6cc8fbfabb8e..cf0cd3146817 100644
--- a/drivers/mtd/nand/nandsim.c
+++ b/drivers/mtd/nand/nandsim.c
@@ -28,7 +28,7 @@
 #include <linux/module.h>
 #include <linux/moduleparam.h>
 #include <linux/vmalloc.h>
-#include <asm/div64.h>
+#include <linux/math64.h>
 #include <linux/slab.h>
 #include <linux/errno.h>
 #include <linux/string.h>
@@ -546,12 +546,6 @@ static char *get_partition_name(int i)
         return kstrdup(buf, GFP_KERNEL);
 }
 
-static uint64_t divide(uint64_t n, uint32_t d)
-{
-        do_div(n, d);
-        return n;
-}
-
 /*
  * Initialize the nandsim structure.
  *
@@ -580,7 +574,7 @@ static int init_nandsim(struct mtd_info *mtd)
         ns->geom.oobsz    = mtd->oobsize;
         ns->geom.secsz    = mtd->erasesize;
         ns->geom.pgszoob  = ns->geom.pgsz + ns->geom.oobsz;
-        ns->geom.pgnum    = divide(ns->geom.totsz, ns->geom.pgsz);
+        ns->geom.pgnum    = div_u64(ns->geom.totsz, ns->geom.pgsz);
         ns->geom.totszoob = ns->geom.totsz + (uint64_t)ns->geom.pgnum * ns->geom.oobsz;
         ns->geom.secshift = ffs(ns->geom.secsz) - 1;
         ns->geom.pgshift  = chip->page_shift;
@@ -921,7 +915,7 @@ static int setup_wear_reporting(struct mtd_info *mtd)
 
         if (!rptwear)
                 return 0;
-        wear_eb_count = divide(mtd->size, mtd->erasesize);
+        wear_eb_count = div_u64(mtd->size, mtd->erasesize);
         mem = wear_eb_count * sizeof(unsigned long);
         if (mem / sizeof(unsigned long) != wear_eb_count) {
                 NS_ERR("Too many erase blocks for wear reporting\n");