diff options
| author | Dmitry Eremin-Solenikov <dbaryshkov@gmail.com> | 2011-06-06 18:04:14 +0400 |
|---|---|---|
| committer | Artem Bityutskiy <artem.bityutskiy@intel.com> | 2011-09-11 15:02:04 +0300 |
| commit | 1a31368bf92ef2a7da3ba379672c405bd2751df9 (patch) | |
| tree | 900ad92a1c8af1bf967ec05623438eb54af9cf80 | |
| parent | bf5140817b2d65faac9b32fc9057a097044ac35b (diff) | |
mtd: add a flags for partitions which should just leave smth. after them
Add support for MTDPART_OFS_RETAIN: such partitions start at the current
offset, take as much space as possible, but rain part->size bytes after
the end of the partitions for other parts. Primarily this is intended
for ts72xx arm platforms cleanup.
Artem: tweaked the patch a bit
Signed-off-by: Dmitry Eremin-Solenikov <dbaryshkov@gmail.com>
Signed-off-by: Artem Bityutskiy <Artem.Bityutskiy@nokia.com>
| -rw-r--r-- | drivers/mtd/mtdpart.c | 13 | ||||
| -rw-r--r-- | include/linux/mtd/partitions.h | 5 |
2 files changed, 17 insertions, 1 deletions
diff --git a/drivers/mtd/mtdpart.c b/drivers/mtd/mtdpart.c index 3477e16be1c..b7372050243 100644 --- a/drivers/mtd/mtdpart.c +++ b/drivers/mtd/mtdpart.c @@ -479,6 +479,19 @@ static struct mtd_part *allocate_partition(struct mtd_info *master, (unsigned long long)cur_offset, (unsigned long long)slave->offset); } } + if (slave->offset == MTDPART_OFS_RETAIN) { + slave->offset = cur_offset; + if (master->size - slave->offset >= slave->mtd.size) { + slave->mtd.size = master->size - slave->offset + - slave->mtd.size; + } else { + printk(KERN_ERR "mtd partition \"%s\" doesn't have enough space: %#llx < %#llx, disabled\n", + part->name, master->size - slave->offset, + slave->mtd.size); + /* register to preserve ordering */ + goto out_register; + } + } if (slave->mtd.size == MTDPART_SIZ_FULL) slave->mtd.size = master->size - slave->offset; diff --git a/include/linux/mtd/partitions.h b/include/linux/mtd/partitions.h index 08c9c7b8b8e..1431cf2609e 100644 --- a/include/linux/mtd/partitions.h +++ b/include/linux/mtd/partitions.h @@ -24,7 +24,9 @@ * will extend to the end of the master MTD device. * offset: absolute starting position within the master MTD device; if * defined as MTDPART_OFS_APPEND, the partition will start where the - * previous one ended; if MTDPART_OFS_NXTBLK, at the next erase block. + * previous one ended; if MTDPART_OFS_NXTBLK, at the next erase block; + * if MTDPART_OFS_RETAIN, consume as much as possible, leaving size + * after the end of partition. * mask_flags: contains flags that have to be masked (removed) from the * master MTD flag set for the corresponding MTD partition. * For example, to force a read-only partition, simply adding @@ -42,6 +44,7 @@ struct mtd_partition { struct nand_ecclayout *ecclayout; /* out of band layout for this partition (NAND only) */ }; +#define MTDPART_OFS_RETAIN (-3) #define MTDPART_OFS_NXTBLK (-2) #define MTDPART_OFS_APPEND (-1) #define MTDPART_SIZ_FULL (0) |