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Partition: Add an own device id for partitions 

Add an own device id for partitions. This is necessary to allow
the partition layer to check if the given device is really a partition.
Also, check for readonly flag in erase.

Signed-off-by: Sascha Hauer <s.hauer@pengutronix.de>
This commit is contained in:
Sascha Hauer 2008-08-14 09:28:10 +02:00
parent 59f72431f4
commit 65778b63d2
3 changed files with 16 additions and 2 deletions
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9
commands/partition.c
View File

@ -41,10 +41,16 @@
static int dev_del_partitions(struct device_d *physdev)
{
struct device_d *child, *tmp;
struct partition *part;
int ret;
device_for_each_child_safe(physdev, tmp, child) {
struct partition *part = child->type_data;
if (child->type != DEVICE_TYPE_PARTITION) {
printf("not a partition: %s\n", child->id);
continue;
}
part = child->type_data;
if (part->flags & PARTITION_FIXED) {
debug("Skip fixed partition: %s\n", child->id);
@ -191,6 +197,7 @@ static int do_addpart(cmd_tbl_t * cmdtp, int argc, char *argv[])
part->num = num;
part->device.map_base = dev->map_base + offset;
part->device.type_data = part;
part->device.type = DEVICE_TYPE_PARTITION;
if (mtd_part_do_parse_one(part, endp, &endp))
goto free_out;

6
common/partition.c
View File

@ -59,6 +59,7 @@ struct device_d *dev_add_partition(struct device_d *dev, unsigned long offset,
part->device.map_base = dev->map_base + offset;
part->device.size = size;
part->device.type_data = part;
part->device.type = DEVICE_TYPE_PARTITION;
get_free_deviceid(part->device.id, name);
part->offset = offset;
@ -71,6 +72,7 @@ struct device_d *dev_add_partition(struct device_d *dev, unsigned long offset,
if (part->device.driver)
return &part->device;
unregister_device(&part->device);
free(part);
return 0;
}
@ -87,6 +89,9 @@ static int part_erase(struct device_d *dev, size_t count, unsigned long offset)
{
struct partition *part = dev->type_data;
if (part->flags & PARTITION_READONLY)
return -EROFS;
return dev_erase(part->physdev, count, offset + part->offset);
}
@ -246,6 +251,7 @@ struct driver_d part_driver = {
.erase = part_erase,
.protect= part_protect,
.memmap = part_memmap,
.type = DEVICE_TYPE_PARTITION,
};
static int partition_init(void)

3
include/driver.h
View File

@ -36,7 +36,8 @@
#define DEVICE_TYPE_MIIPHY 6
#define DEVICE_TYPE_NAND 7
#define DEVICE_TYPE_NAND_BB 8
#define MAX_DEVICE_TYPE 8
#define DEVICE_TYPE_PARTITION 9
#define MAX_DEVICE_TYPE 9
#include <param.h>