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| author | Artem Bityutskiy <Artem.Bityutskiy@nokia.com> | 2007-12-17 16:37:26 +0100 |
|---|---|---|
| committer | Artem Bityutskiy <Artem.Bityutskiy@nokia.com> | 2007-12-26 18:15:17 +0100 |
| commit | e73f4459d969bb266f03dd4cbe21bdba8cb2732c (patch) | |
| tree | 5af7655da65f2c33f6ea4efdfaa8b0e0670d6aea /drivers/mtd/ubi/eba.c | |
| parent | UBI: add UBI control device (diff) | |
| download | linux-e73f4459d969bb266f03dd4cbe21bdba8cb2732c.tar.xz linux-e73f4459d969bb266f03dd4cbe21bdba8cb2732c.zip | |
UBI: add UBI devices reference counting
This is one more step on the way to "removable" UBI devices. It
adds reference counting for UBI devices. Every time a volume on
this device is opened - the device's refcount is increased. It
is also increased if someone is reading any sysfs file of this
UBI device or of one of its volumes.
Signed-off-by: Artem Bityutskiy <Artem.Bityutskiy@nokia.com>
Diffstat (limited to 'drivers/mtd/ubi/eba.c')
| -rw-r--r-- | drivers/mtd/ubi/eba.c | 5 |
1 files changed, 5 insertions, 0 deletions
diff --git a/drivers/mtd/ubi/eba.c b/drivers/mtd/ubi/eba.c index c94f475758de..85297cde4ac5 100644 --- a/drivers/mtd/ubi/eba.c +++ b/drivers/mtd/ubi/eba.c @@ -339,6 +339,7 @@ int ubi_eba_unmap_leb(struct ubi_device *ubi, struct ubi_volume *vol, { int err, pnum, vol_id = vol->vol_id; + ubi_assert(ubi->ref_count > 0); ubi_assert(vol->ref_count > 0); if (ubi->ro_mode) @@ -389,6 +390,7 @@ int ubi_eba_read_leb(struct ubi_device *ubi, struct ubi_volume *vol, int lnum, struct ubi_vid_hdr *vid_hdr; uint32_t uninitialized_var(crc); + ubi_assert(ubi->ref_count > 0); ubi_assert(vol->ref_count > 0); err = leb_read_lock(ubi, vol_id, lnum); @@ -614,6 +616,7 @@ int ubi_eba_write_leb(struct ubi_device *ubi, struct ubi_volume *vol, int lnum, int err, pnum, tries = 0, vol_id = vol->vol_id; struct ubi_vid_hdr *vid_hdr; + ubi_assert(ubi->ref_count > 0); ubi_assert(vol->ref_count > 0); if (ubi->ro_mode) @@ -749,6 +752,7 @@ int ubi_eba_write_leb_st(struct ubi_device *ubi, struct ubi_volume *vol, struct ubi_vid_hdr *vid_hdr; uint32_t crc; + ubi_assert(ubi->ref_count > 0); ubi_assert(vol->ref_count > 0); if (ubi->ro_mode) @@ -865,6 +869,7 @@ int ubi_eba_atomic_leb_change(struct ubi_device *ubi, struct ubi_volume *vol, struct ubi_vid_hdr *vid_hdr; uint32_t crc; + ubi_assert(ubi->ref_count > 0); ubi_assert(vol->ref_count > 0); if (ubi->ro_mode) |