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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.c49
1 files changed, 43 insertions, 6 deletions
diff --git a/drivers/mtd/ubi/eba.c b/drivers/mtd/ubi/eba.c
index 9f87c99189a..fe74749e0da 100644
--- a/drivers/mtd/ubi/eba.c
+++ b/drivers/mtd/ubi/eba.c
@@ -418,7 +418,8 @@ retry:
* may try to recover data. FIXME: but this is
* not implemented.
*/
- if (err == UBI_IO_BAD_VID_HDR) {
+ if (err == UBI_IO_BAD_HDR_READ ||
+ err == UBI_IO_BAD_HDR) {
ubi_warn("corrupted VID header at PEB "
"%d, LEB %d:%d", pnum, vol_id,
lnum);
@@ -961,8 +962,8 @@ write_error:
*/
static int is_error_sane(int err)
{
- if (err == -EIO || err == -ENOMEM || err == UBI_IO_BAD_VID_HDR ||
- err == -ETIMEDOUT)
+ if (err == -EIO || err == -ENOMEM || err == UBI_IO_BAD_HDR ||
+ err == UBI_IO_BAD_HDR_READ || err == -ETIMEDOUT)
return 0;
return 1;
}
@@ -1165,6 +1166,44 @@ out_unlock_leb:
}
/**
+ * print_rsvd_warning - warn about not having enough reserved PEBs.
+ * @ubi: UBI device description object
+ *
+ * This is a helper function for 'ubi_eba_init_scan()' which is called when UBI
+ * cannot reserve enough PEBs for bad block handling. This function makes a
+ * decision whether we have to print a warning or not. The algorithm is as
+ * follows:
+ * o if this is a new UBI image, then just print the warning
+ * o if this is an UBI image which has already been used for some time, print
+ * a warning only if we can reserve less than 10% of the expected amount of
+ * the reserved PEB.
+ *
+ * The idea is that when UBI is used, PEBs become bad, and the reserved pool
+ * of PEBs becomes smaller, which is normal and we do not want to scare users
+ * with a warning every time they attach the MTD device. This was an issue
+ * reported by real users.
+ */
+static void print_rsvd_warning(struct ubi_device *ubi,
+ struct ubi_scan_info *si)
+{
+ /*
+ * The 1 << 18 (256KiB) number is picked randomly, just a reasonably
+ * large number to distinguish between newly flashed and used images.
+ */
+ if (si->max_sqnum > (1 << 18)) {
+ int min = ubi->beb_rsvd_level / 10;
+
+ if (!min)
+ min = 1;
+ if (ubi->beb_rsvd_pebs > min)
+ return;
+ }
+
+ ubi_warn("cannot reserve enough PEBs for bad PEB handling, reserved %d,"
+ " need %d", ubi->beb_rsvd_pebs, ubi->beb_rsvd_level);
+}
+
+/**
* ubi_eba_init_scan - initialize the EBA sub-system using scanning information.
* @ubi: UBI device description object
* @si: scanning information
@@ -1236,9 +1275,7 @@ int ubi_eba_init_scan(struct ubi_device *ubi, struct ubi_scan_info *si)
if (ubi->avail_pebs < ubi->beb_rsvd_level) {
/* No enough free physical eraseblocks */
ubi->beb_rsvd_pebs = ubi->avail_pebs;
- ubi_warn("cannot reserve enough PEBs for bad PEB "
- "handling, reserved %d, need %d",
- ubi->beb_rsvd_pebs, ubi->beb_rsvd_level);
+ print_rsvd_warning(ubi, si);
} else
ubi->beb_rsvd_pebs = ubi->beb_rsvd_level;