Merge git://git.infradead.org/~dwmw2/mtd-2.6.31

* git://git.infradead.org/~dwmw2/mtd-2.6.31:
  JFFS2: add missing verify buffer allocation/deallocation
  mtd: nftl: fix offset alignments
  mtd: nftl: write support is broken
  mtd: m25p80: fix null pointer dereference bug

2 files changed, 10 insertions, 7 deletions

diff --git a/drivers/mtd/devices/m25p80.c b/drivers/mtd/devices/m25p80.c
index ae5fe91867e1..10ed195c0c1c 100644
--- a/drivers/mtd/devices/m25p80.c
+++ b/drivers/mtd/devices/m25p80.c
@@ -736,7 +736,7 @@ static int __devinit m25p_probe(struct spi_device *spi)
                         flash->partitioned = 1;
                         return add_mtd_partitions(&flash->mtd, parts, nr_parts);
                 }
-        } else if (data->nr_parts)
+        } else if (data && data->nr_parts)
                 dev_warn(&spi->dev, "ignoring %d default partitions on %s\n",
                                 data->nr_parts, data->name);
 
diff --git a/drivers/mtd/nftlcore.c b/drivers/mtd/nftlcore.c
index fb86cacd5bdb..1002e1882996 100644
--- a/drivers/mtd/nftlcore.c
+++ b/drivers/mtd/nftlcore.c
@@ -135,16 +135,17 @@ static void nftl_remove_dev(struct mtd_blktrans_dev *dev)
 int nftl_read_oob(struct mtd_info *mtd, loff_t offs, size_t len,
                   size_t *retlen, uint8_t *buf)
 {
+        loff_t mask = mtd->writesize - 1;
         struct mtd_oob_ops ops;
         int res;
 
         ops.mode = MTD_OOB_PLACE;
-        ops.ooboffs = offs & (mtd->writesize - 1);
+        ops.ooboffs = offs & mask;
         ops.ooblen = len;
         ops.oobbuf = buf;
         ops.datbuf = NULL;
 
-        res = mtd->read_oob(mtd, offs & ~(mtd->writesize - 1), &ops);
+        res = mtd->read_oob(mtd, offs & ~mask, &ops);
         *retlen = ops.oobretlen;
         return res;
 }
@@ -155,16 +156,17 @@ int nftl_read_oob(struct mtd_info *mtd, loff_t offs, size_t len,
 int nftl_write_oob(struct mtd_info *mtd, loff_t offs, size_t len,
                    size_t *retlen, uint8_t *buf)
 {
+        loff_t mask = mtd->writesize - 1;
         struct mtd_oob_ops ops;
         int res;
 
         ops.mode = MTD_OOB_PLACE;
-        ops.ooboffs = offs & (mtd->writesize - 1);
+        ops.ooboffs = offs & mask;
         ops.ooblen = len;
         ops.oobbuf = buf;
         ops.datbuf = NULL;
 
-        res = mtd->write_oob(mtd, offs & ~(mtd->writesize - 1), &ops);
+        res = mtd->write_oob(mtd, offs & ~mask, &ops);
         *retlen = ops.oobretlen;
         return res;
 }
@@ -177,17 +179,18 @@ int nftl_write_oob(struct mtd_info *mtd, loff_t offs, size_t len,
 static int nftl_write(struct mtd_info *mtd, loff_t offs, size_t len,
                       size_t *retlen, uint8_t *buf, uint8_t *oob)
 {
+        loff_t mask = mtd->writesize - 1;
         struct mtd_oob_ops ops;
         int res;
 
         ops.mode = MTD_OOB_PLACE;
-        ops.ooboffs = offs;
+        ops.ooboffs = offs & mask;
         ops.ooblen = mtd->oobsize;
         ops.oobbuf = oob;
         ops.datbuf = buf;
         ops.len = len;
 
-        res = mtd->write_oob(mtd, offs & ~(mtd->writesize - 1), &ops);
+        res = mtd->write_oob(mtd, offs & ~mask, &ops);
         *retlen = ops.retlen;
         return res;
 }