[PATCH] mtd: partitions: no unnecessary check for erase block

[Bastian Stender]

Partitions must start/end on erase block or boundary to be writeable.
This makes only sense if erasing is necessary. Do not force the
partition to be read-only if MTD_NO_ERASE flag is set.

Signed-off-by: Bastian Stender <bst at pengutronix.de>
---
 drivers/mtd/mtdpart.c | 2 ++
 1 file changed, 2 insertions(+)

diff --git a/drivers/mtd/mtdpart.c b/drivers/mtd/mtdpart.c
index fccdd49bb964..cd138023ed32 100644
--- a/drivers/mtd/mtdpart.c
+++ b/drivers/mtd/mtdpart.c
@@ -557,6 +557,7 @@ static struct mtd_part *allocate_partition(struct mtd_info *master,
 	}
 
 	if ((slave->mtd.flags & MTD_WRITEABLE) &&
+	    !(slave->mtd.flags & MTD_NO_ERASE) &&
 	    mtd_mod_by_eb(slave->offset, &slave->mtd)) {
 		/* Doesn't start on a boundary of major erase size */
 		/* FIXME: Let it be writable if it is on a boundary of
@@ -566,6 +567,7 @@ static struct mtd_part *allocate_partition(struct mtd_info *master,
 			part->name);
 	}
 	if ((slave->mtd.flags & MTD_WRITEABLE) &&
+	    !(slave->mtd.flags & MTD_NO_ERASE) &&
 	    mtd_mod_by_eb(slave->mtd.size, &slave->mtd)) {
 		slave->mtd.flags &= ~MTD_WRITEABLE;
 		printk(KERN_WARNING"mtd: partition \"%s\" doesn't end on an erase block -- force read-only\n",
-- 
2.11.0