From f03d42afb0fa7599b626fc0c005424edfd123f99 Mon Sep 17 00:00:00 2001 From: Mike Frysinger Date: Thu, 23 Sep 2010 21:53:38 -0400 Subject: libmtd: add lock/unlock helpers Signed-off-by: Mike Frysinger Signed-off-by: Artem Bityutskiy --- lib/libmtd.c | 32 ++++++++++++++++++++++++++++++++ 1 file changed, 32 insertions(+) (limited to 'lib/libmtd.c') diff --git a/lib/libmtd.c b/lib/libmtd.c index d57ae8f..1b3d597 100644 --- a/lib/libmtd.c +++ b/lib/libmtd.c @@ -802,6 +802,38 @@ static int mtd_valid_erase_block(const struct mtd_dev_info *mtd, int eb) return 0; } +static int mtd_xlock(const struct mtd_dev_info *mtd, int fd, int eb, int req, + const char *sreq) +{ + int ret; + struct erase_info_user ei; + + ret = mtd_valid_erase_block(mtd, eb); + if (ret) + return ret; + + ei.start = eb * mtd->eb_size; + ei.length = mtd->eb_size; + + ret = ioctl(fd, req, &ei); + if (ret < 0) + return sys_errmsg("%s ioctl failed for eraseblock %d " + "(mtd%d)", sreq, eb, mtd->mtd_num); + + return 0; +} +#define mtd_xlock(mtd, fd, eb, req) mtd_xlock(mtd, fd, eb, req, #req) + +int mtd_lock(const struct mtd_dev_info *mtd, int fd, int eb) +{ + return mtd_xlock(mtd, fd, eb, MEMLOCK); +} + +int mtd_unlock(const struct mtd_dev_info *mtd, int fd, int eb) +{ + return mtd_xlock(mtd, fd, eb, MEMUNLOCK); +} + int mtd_erase(libmtd_t desc, const struct mtd_dev_info *mtd, int fd, int eb) { int ret; -- cgit v1.2.3