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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 <ezequiel.garcia@free-electrons.com>
Signed-off-by: Artem Bityutskiy <artem.bityutskiy@linux.intel.com>
Cc: stable@vger.kernel.org # v3.15+
This commit is contained in:
Ezequiel Garcia 2014-08-29 18:42:29 -03:00 committed by Artem Bityutskiy
parent 978d649675
commit 06d9c2905f
1 changed files with 14 additions and 2 deletions
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16
drivers/mtd/ubi/block.c
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@ -524,8 +524,12 @@ static int ubiblock_resize(struct ubi_volume_info *vi)
} }
mutex_lock(&dev->dev_mutex); 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(&dev->dev_mutex);
mutex_unlock(&devices_mutex); mutex_unlock(&devices_mutex);
return 0; return 0;
@ -549,6 +553,14 @@ static int ubiblock_notify(struct notifier_block *nb,
case UBI_VOLUME_RESIZED: case UBI_VOLUME_RESIZED:
ubiblock_resize(&nt->vi); ubiblock_resize(&nt->vi);
break; 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: default:
break; break;
} }