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Commit a5bf6190 authored by Artem Bityutskiy's avatar Artem Bityutskiy
Browse files

UBI: add ubi_sync() interface 



To flush MTD device caches.

Signed-off-by: default avatarArtem Bityutskiy <Artem.Bityutskiy@nokia.com>
parent 73789a3d

drivers/mtd/ubi/kapi.c

+24 −0
Original line number Diff line number Diff line
@@ -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);

include/linux/mtd/ubi.h

+1 −0
Original line number Diff line number Diff line
@@ -152,6 +152,7 @@ int ubi_leb_erase(struct ubi_volume_desc *desc, int lnum); 
int ubi_leb_unmap(struct ubi_volume_desc *desc, int lnum);

int ubi_leb_map(struct ubi_volume_desc *desc, int lnum, int dtype);

int ubi_is_mapped(struct ubi_volume_desc *desc, int lnum);

int ubi_sync(int ubi_num);



/*

 * This function is the same as the 'ubi_leb_read()' function, but it does not