From 06d9c2905f745c8b1920a335cbb366ba6b0fc754 Mon Sep 17 00:00:00 2001 From: Ezequiel Garcia Date: Fri, 29 Aug 2014 18:42:29 -0300 Subject: UBI: block: Add support for the UBI_VOLUME_UPDATED notification Static volumes can change its 'used_bytes' when they get updated, and so the block interface must listen to the UBI_VOLUME_UPDATED notification to resize the block device accordingly. Signed-off-by: Ezequiel Garcia Signed-off-by: Artem Bityutskiy Cc: stable@vger.kernel.org # v3.15+ --- drivers/mtd/ubi/block.c | 16 ++++++++++++++-- 1 file changed, 14 insertions(+), 2 deletions(-) diff --git a/drivers/mtd/ubi/block.c b/drivers/mtd/ubi/block.c index 581784485376..8876c7d3d712 100644 --- a/drivers/mtd/ubi/block.c +++ b/drivers/mtd/ubi/block.c @@ -524,8 +524,12 @@ static int ubiblock_resize(struct ubi_volume_info *vi) } mutex_lock(&dev->dev_mutex); - set_capacity(dev->gd, disk_capacity); - ubi_msg("%s resized to %lld bytes", dev->gd->disk_name, vi->used_bytes); + + if (get_capacity(dev->gd) != disk_capacity) { + set_capacity(dev->gd, disk_capacity); + ubi_msg("%s resized to %lld bytes", dev->gd->disk_name, + vi->used_bytes); + } mutex_unlock(&dev->dev_mutex); mutex_unlock(&devices_mutex); return 0; @@ -549,6 +553,14 @@ static int ubiblock_notify(struct notifier_block *nb, case UBI_VOLUME_RESIZED: ubiblock_resize(&nt->vi); break; + case UBI_VOLUME_UPDATED: + /* + * If the volume is static, a content update might mean the + * size (i.e. used_bytes) was also changed. + */ + if (nt->vi.vol_type == UBI_STATIC_VOLUME) + ubiblock_resize(&nt->vi); + break; default: break; } -- cgit v1.2.3