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path: root/drivers/mtd/ubi/eba.c
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Diffstat (limited to 'drivers/mtd/ubi/eba.c')
-rw-r--r--drivers/mtd/ubi/eba.c53
1 files changed, 32 insertions, 21 deletions
diff --git a/drivers/mtd/ubi/eba.c b/drivers/mtd/ubi/eba.c
index d8966bae0e0..25def348e5b 100644
--- a/drivers/mtd/ubi/eba.c
+++ b/drivers/mtd/ubi/eba.c
@@ -504,12 +504,9 @@ static int recover_peb(struct ubi_device *ubi, int pnum, int vol_id, int lnum,
if (!vid_hdr)
return -ENOMEM;
- mutex_lock(&ubi->buf_mutex);
-
retry:
new_pnum = ubi_wl_get_peb(ubi, UBI_UNKNOWN);
if (new_pnum < 0) {
- mutex_unlock(&ubi->buf_mutex);
ubi_free_vid_hdr(ubi, vid_hdr);
return new_pnum;
}
@@ -529,20 +526,23 @@ retry:
goto write_error;
data_size = offset + len;
+ mutex_lock(&ubi->buf_mutex);
memset(ubi->peb_buf1 + offset, 0xFF, len);
/* Read everything before the area where the write failure happened */
if (offset > 0) {
err = ubi_io_read_data(ubi, ubi->peb_buf1, pnum, 0, offset);
if (err && err != UBI_IO_BITFLIPS)
- goto out_put;
+ goto out_unlock;
}
memcpy(ubi->peb_buf1 + offset, buf, len);
err = ubi_io_write_data(ubi, ubi->peb_buf1, new_pnum, 0, data_size);
- if (err)
+ if (err) {
+ mutex_unlock(&ubi->buf_mutex);
goto write_error;
+ }
mutex_unlock(&ubi->buf_mutex);
ubi_free_vid_hdr(ubi, vid_hdr);
@@ -553,8 +553,9 @@ retry:
ubi_msg("data was successfully recovered");
return 0;
-out_put:
+out_unlock:
mutex_unlock(&ubi->buf_mutex);
+out_put:
ubi_wl_put_peb(ubi, new_pnum, 1);
ubi_free_vid_hdr(ubi, vid_hdr);
return err;
@@ -567,7 +568,6 @@ write_error:
ubi_warn("failed to write to PEB %d", new_pnum);
ubi_wl_put_peb(ubi, new_pnum, 1);
if (++tries > UBI_IO_RETRIES) {
- mutex_unlock(&ubi->buf_mutex);
ubi_free_vid_hdr(ubi, vid_hdr);
return err;
}
@@ -717,7 +717,7 @@ write_error:
* to the real data size, although the @buf buffer has to contain the
* alignment. In all other cases, @len has to be aligned.
*
- * It is prohibited to write more then once to logical eraseblocks of static
+ * It is prohibited to write more than once to logical eraseblocks of static
* volumes. This function returns zero in case of success and a negative error
* code in case of failure.
*/
@@ -949,10 +949,14 @@ write_error:
* This function copies logical eraseblock from physical eraseblock @from to
* physical eraseblock @to. The @vid_hdr buffer may be changed by this
* function. Returns:
- * o %0 in case of success;
- * o %1 if the operation was canceled and should be tried later (e.g.,
- * because a bit-flip was detected at the target PEB);
- * o %2 if the volume is being deleted and this LEB should not be moved.
+ * o %0 in case of success;
+ * o %1 if the operation was canceled because the volume is being deleted
+ * or because the PEB was put meanwhile;
+ * o %2 if the operation was canceled because there was a write error to the
+ * target PEB;
+ * o %-EAGAIN if the operation was canceled because a bit-flip was detected
+ * in the target PEB;
+ * o a negative error code in case of failure.
*/
int ubi_eba_copy_leb(struct ubi_device *ubi, int from, int to,
struct ubi_vid_hdr *vid_hdr)
@@ -978,7 +982,7 @@ int ubi_eba_copy_leb(struct ubi_device *ubi, int from, int to,
/*
* Note, we may race with volume deletion, which means that the volume
* this logical eraseblock belongs to might be being deleted. Since the
- * volume deletion unmaps all the volume's logical eraseblocks, it will
+ * volume deletion un-maps all the volume's logical eraseblocks, it will
* be locked in 'ubi_wl_put_peb()' and wait for the WL worker to finish.
*/
vol = ubi->volumes[idx];
@@ -986,7 +990,7 @@ int ubi_eba_copy_leb(struct ubi_device *ubi, int from, int to,
/* No need to do further work, cancel */
dbg_eba("volume %d is being removed, cancel", vol_id);
spin_unlock(&ubi->volumes_lock);
- return 2;
+ return 1;
}
spin_unlock(&ubi->volumes_lock);
@@ -1023,7 +1027,7 @@ int ubi_eba_copy_leb(struct ubi_device *ubi, int from, int to,
/*
* OK, now the LEB is locked and we can safely start moving it. Since
- * this function utilizes thie @ubi->peb1_buf buffer which is shared
+ * this function utilizes the @ubi->peb1_buf buffer which is shared
* with some other functions, so lock the buffer by taking the
* @ubi->buf_mutex.
*/
@@ -1068,8 +1072,11 @@ int ubi_eba_copy_leb(struct ubi_device *ubi, int from, int to,
vid_hdr->sqnum = cpu_to_be64(next_sqnum(ubi));
err = ubi_io_write_vid_hdr(ubi, to, vid_hdr);
- if (err)
+ if (err) {
+ if (err == -EIO)
+ err = 2;
goto out_unlock_buf;
+ }
cond_resched();
@@ -1079,14 +1086,17 @@ int ubi_eba_copy_leb(struct ubi_device *ubi, int from, int to,
if (err != UBI_IO_BITFLIPS)
ubi_warn("cannot read VID header back from PEB %d", to);
else
- err = 1;
+ err = -EAGAIN;
goto out_unlock_buf;
}
if (data_size > 0) {
err = ubi_io_write_data(ubi, ubi->peb_buf1, to, 0, aldata_size);
- if (err)
+ if (err) {
+ if (err == -EIO)
+ err = 2;
goto out_unlock_buf;
+ }
cond_resched();
@@ -1101,15 +1111,16 @@ int ubi_eba_copy_leb(struct ubi_device *ubi, int from, int to,
ubi_warn("cannot read data back from PEB %d",
to);
else
- err = 1;
+ err = -EAGAIN;
goto out_unlock_buf;
}
cond_resched();
if (memcmp(ubi->peb_buf1, ubi->peb_buf2, aldata_size)) {
- ubi_warn("read data back from PEB %d - it is different",
- to);
+ ubi_warn("read data back from PEB %d and it is "
+ "different", to);
+ err = -EINVAL;
goto out_unlock_buf;
}
}