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authorDan Ehrenberg <dehrenberg@chromium.org>2015-04-03 01:15:12 +0300
committerBrian Norris <computersforpeace@gmail.com>2015-04-06 03:44:03 +0300
commit3a434f66e6dab645d74a59c95651cdbe16497a50 (patch)
treef5e2436ddb07c5275abc029db9ff82f98914a6da /drivers/mtd
parenta62c24d75529118d10c45350c3b75715d52ff574 (diff)
downloadlinux-3a434f66e6dab645d74a59c95651cdbe16497a50.tar.xz
mtd: part: Remove partition overlap checks
This patch makes MTD dynamic partitioning more flexible by removing overlap checks for dynamic partitions. I don't see any particular reason why overlapping dynamic partitions should be prohibited while static partitions are allowed to overlap freely. The checks previously had an off-by-one error, where 'end' should be one less than what it is currently set at, and adding partitions out of increasing order will fail. Disabling the checks resolves this issue. Signed-off-by: Dan Ehrenberg <dehrenberg@chromium.org> Signed-off-by: Brian Norris <computersforpeace@gmail.com>
Diffstat (limited to 'drivers/mtd')
-rw-r--r--drivers/mtd/mtdpart.c21
1 files changed, 1 insertions, 20 deletions
diff --git a/drivers/mtd/mtdpart.c b/drivers/mtd/mtdpart.c
index be8034086701..cafdb8855a79 100644
--- a/drivers/mtd/mtdpart.c
+++ b/drivers/mtd/mtdpart.c
@@ -582,8 +582,7 @@ int mtd_add_partition(struct mtd_info *master, const char *name,
long long offset, long long length)
{
struct mtd_partition part;
- struct mtd_part *p, *new;
- uint64_t start, end;
+ struct mtd_part *new;
int ret = 0;
/* the direct offset is expected */
@@ -607,21 +606,7 @@ int mtd_add_partition(struct mtd_info *master, const char *name,
if (IS_ERR(new))
return PTR_ERR(new);
- start = offset;
- end = offset + length;
-
mutex_lock(&mtd_partitions_mutex);
- list_for_each_entry(p, &mtd_partitions, list)
- if (p->master == master) {
- if ((start >= p->offset) &&
- (start < (p->offset + p->mtd.size)))
- goto err_inv;
-
- if ((end >= p->offset) &&
- (end < (p->offset + p->mtd.size)))
- goto err_inv;
- }
-
list_add(&new->list, &mtd_partitions);
mutex_unlock(&mtd_partitions_mutex);
@@ -630,10 +615,6 @@ int mtd_add_partition(struct mtd_info *master, const char *name,
mtd_add_partition_attrs(new);
return ret;
-err_inv:
- mutex_unlock(&mtd_partitions_mutex);
- free_partition(new);
- return -EINVAL;
}
EXPORT_SYMBOL_GPL(mtd_add_partition);