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authorArtem Bityutskiy <Artem.Bityutskiy@nokia.com>2008-07-10 17:38:33 +0200
committerArtem Bityutskiy <Artem.Bityutskiy@nokia.com>2008-07-24 12:32:56 +0200
commita5bf6190417cbbf80443a9f71c65b653e13e9982 (patch)
tree341b656517b02efe8ee49446d4591625da69171a /drivers
parentUBI: fix 64-bit calculations (diff)
downloadlinux-a5bf6190417cbbf80443a9f71c65b653e13e9982.tar.xz
linux-a5bf6190417cbbf80443a9f71c65b653e13e9982.zip
UBI: add ubi_sync() interface
To flush MTD device caches. Signed-off-by: Artem Bityutskiy <Artem.Bityutskiy@nokia.com>
Diffstat (limited to 'drivers')
-rw-r--r--drivers/mtd/ubi/kapi.c24
1 files changed, 24 insertions, 0 deletions
diff --git a/drivers/mtd/ubi/kapi.c b/drivers/mtd/ubi/kapi.c
index 51508832566d..e65c8e0bcd5d 100644
--- a/drivers/mtd/ubi/kapi.c
+++ b/drivers/mtd/ubi/kapi.c
@@ -632,3 +632,27 @@ int ubi_is_mapped(struct ubi_volume_desc *desc, int lnum)
return vol->eba_tbl[lnum] >= 0;
}
EXPORT_SYMBOL_GPL(ubi_is_mapped);
+
+/**
+ * ubi_sync - synchronize UBI device buffers.
+ * @ubi_num: UBI device to synchronize
+ *
+ * The underlying MTD device may cache data in hardware or in software. This
+ * function ensures the caches are flushed. Returns zero in case of success and
+ * a negative error code in case of failure.
+ */
+int ubi_sync(int ubi_num)
+{
+ struct ubi_device *ubi;
+
+ ubi = ubi_get_device(ubi_num);
+ if (!ubi)
+ return -ENODEV;
+
+ if (ubi->mtd->sync)
+ ubi->mtd->sync(ubi->mtd);
+
+ ubi_put_device(ubi);
+ return 0;
+}
+EXPORT_SYMBOL_GPL(ubi_sync);