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[MTD] [MAPS] physmap: fix wrong free and del_mtd_{partition,device} 

commit 176bf2e0f1 ("physmap: fix leak of
memory returned by parse_mtd_partitions") deals with a memory leak and
frees the pointer array of mtd_partition after the call to
add_mtd_partitions().  the problem is that mtd_table[x]->name still points
to the freed memory.

Aldo physmap_flash_remove() should call del_mtd_partitions() or
del_mtd_device() only once.

Signed-off-by: Atsushi Nemoto <anemo@mba.ocn.ne.jp>
Reported-by: Matthias Kaehlcke <matthias@kaehlcke.net>
Tested-by: Matthias Kaehlcke <matthias@kaehlcke.net>
Signed-off-by: Andrew Morton <akpm@linux-foundation.org>
Signed-off-by: David Woodhouse <David.Woodhouse@intel.com>
This commit is contained in:
Atsushi Nemoto 2009-02-11 13:12:17 -08:00 committed by David Woodhouse
parent 3afd522de8
commit e480814f13
1 changed files with 19 additions and 19 deletions
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38
drivers/mtd/maps/physmap.c
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@ -29,6 +29,7 @@ struct physmap_flash_info {
struct map_info map[MAX_RESOURCES];
#ifdef CONFIG_MTD_PARTITIONS
int nr_parts;
struct mtd_partition *parts;
#endif
};
@ -45,25 +46,26 @@ static int physmap_flash_remove(struct platform_device *dev)
physmap_data = dev->dev.platform_data;
#ifdef CONFIG_MTD_CONCAT
if (info->cmtd != info->mtd[0]) {
#ifdef CONFIG_MTD_PARTITIONS
if (info->nr_parts) {
del_mtd_partitions(info->cmtd);
kfree(info->parts);
} else if (physmap_data->nr_parts)
del_mtd_partitions(info->cmtd);
else
del_mtd_device(info->cmtd);
#else
del_mtd_device(info->cmtd);
#endif
#ifdef CONFIG_MTD_CONCAT
if (info->cmtd != info->mtd[0])
mtd_concat_destroy(info->cmtd);
}
#endif
for (i = 0; i < MAX_RESOURCES; i++) {
if (info->mtd[i] != NULL) {
#ifdef CONFIG_MTD_PARTITIONS
if (info->nr_parts || physmap_data->nr_parts)
del_mtd_partitions(info->mtd[i]);
else
del_mtd_device(info->mtd[i]);
#else
del_mtd_device(info->mtd[i]);
#endif
if (info->mtd[i] != NULL)
map_destroy(info->mtd[i]);
}
}
return 0;
}
@ -86,9 +88,6 @@ static int physmap_flash_probe(struct platform_device *dev)
int err = 0;
int i;
int devices_found = 0;
#ifdef CONFIG_MTD_PARTITIONS
struct mtd_partition *parts;
#endif
physmap_data = dev->dev.platform_data;
if (physmap_data == NULL)
@ -167,10 +166,11 @@ static int physmap_flash_probe(struct platform_device *dev)
goto err_out;
#ifdef CONFIG_MTD_PARTITIONS
err = parse_mtd_partitions(info->cmtd, part_probe_types, &parts, 0);
err = parse_mtd_partitions(info->cmtd, part_probe_types,
&info->parts, 0);
if (err > 0) {
add_mtd_partitions(info->cmtd, parts, err);
kfree(parts);
add_mtd_partitions(info->cmtd, info->parts, err);
info->nr_parts = err;
return 0;
}