diff options
Diffstat (limited to 'nuttx/drivers/mtd/mtd_partition.c')
| -rw-r--r-- | nuttx/drivers/mtd/mtd_partition.c | 11 |
1 files changed, 10 insertions, 1 deletions
diff --git a/nuttx/drivers/mtd/mtd_partition.c b/nuttx/drivers/mtd/mtd_partition.c index 1bff0af9c..699a2fa5a 100644 --- a/nuttx/drivers/mtd/mtd_partition.c +++ b/nuttx/drivers/mtd/mtd_partition.c @@ -137,7 +137,7 @@ static bool part_bytecheck(FAR struct mtd_partition_s *priv, off_t byoff) erasesize = priv->blocksize * priv->blkpererase; readend = (byoff + erasesize - 1) / erasesize; - return readend < priv->neraseblocks; + return readend <= priv->neraseblocks; } /**************************************************************************** @@ -410,6 +410,12 @@ static int part_ioctl(FAR struct mtd_dev_s *dev, int cmd, unsigned long arg) * sector count (where the size of a sector is provided the by parent MTD * driver). * + * NOTE: Since there may be a number of MTD partition drivers operating on + * the same, underlying FLASH driver, that FLASH driver must be capable + * of enforcing mutually exclusive access to the FLASH device. Without + * partitions, that mutual exclusion would be provided by the file system + * above the FLASH driver. + * ****************************************************************************/ FAR struct mtd_dev_s *mtd_partition(FAR struct mtd_dev_s *mtd, off_t firstblock, @@ -483,6 +489,9 @@ FAR struct mtd_dev_s *mtd_partition(FAR struct mtd_dev_s *mtd, off_t firstblock, part->child.bwrite = part_bwrite; part->child.read = mtd->read ? part_read : NULL; part->child.ioctl = part_ioctl; +#ifdef CONFIG_MTD_BYTE_WRITE + part->child.write = mtd->write ? part_write : NULL; +#endif part->parent = mtd; part->firstblock = erasestart * blkpererase; |