UBI: separate out corrupted list

This patch introduces 'add_corrupted()' function and separates out 'corr' list
manipulation from the common 'add_to_list()' function. This is just a
preparation for further changes - this patch does not change functionality.

Signed-off-by: Artem Bityutskiy <Artem.Bityutskiy@nokia.com>

diff --git a/drivers/mtd/ubi/scan.c b/drivers/mtd/ubi/scan.c
index 9405e24..fba3dc6 100644 (file)
--- a/drivers/mtd/ubi/scan.c
+++ b/drivers/mtd/ubi/scan.c
@@ -64,9 +64,9 @@ static struct ubi_vid_hdr *vidh;
  * @ec: erase counter of the physical eraseblock
  * @list: the list to add to
  *
- * This function adds physical eraseblock @pnum to free, erase, corrupted or
- * alien lists. Returns zero in case of success and a negative error code in
- * case of failure.
+ * This function adds physical eraseblock @pnum to free, erase, or alien lists.
+ * Returns zero in case of success and a negative error code in case of
+ * failure.
  */
 static int add_to_list(struct ubi_scan_info *si, int pnum, int ec,
                       struct list_head *list)
@@ -79,9 +79,6 @@ static int add_to_list(struct ubi_scan_info *si, int pnum, int ec,
        } else if (list == &si->erase) {
                dbg_bld("add to erase: PEB %d, EC %d", pnum, ec);
                si->erase_peb_count += 1;
-       } else if (list == &si->corr) {
-               dbg_bld("add to corrupted: PEB %d, EC %d", pnum, ec);
-               si->corr_peb_count += 1;
        } else if (list == &si->alien) {
                dbg_bld("add to alien: PEB %d, EC %d", pnum, ec);
                si->alien_peb_count += 1;
@@ -98,6 +95,33 @@ static int add_to_list(struct ubi_scan_info *si, int pnum, int ec,
        return 0;
 }
 
+/**
+ * add_corrupted - add a corrupted physical eraseblock.
+ * @si: scanning information
+ * @pnum: physical eraseblock number to add
+ * @ec: erase counter of the physical eraseblock
+ *
+ * This function adds corrupted physical eraseblock @pnum to the 'corr' list.
+ * Returns zero in case of success and a negative error code in case of
+ * failure.
+ */
+static int add_corrupted(struct ubi_scan_info *si, int pnum, int ec)
+{
+       struct ubi_scan_leb *seb;
+
+       dbg_bld("add to corrupted: PEB %d, EC %d", pnum, ec);
+
+       seb = kmalloc(sizeof(struct ubi_scan_leb), GFP_KERNEL);
+       if (!seb)
+               return -ENOMEM;
+
+       si->corr_peb_count += 1;
+       seb->pnum = pnum;
+       seb->ec = ec;
+       list_add(&seb->u.list, &si->corr);
+       return 0;
+}
+
 /**
  * validate_vid_hdr - check volume identifier header.
  * @vid_hdr: the volume identifier header to check
@@ -464,8 +488,7 @@ int ubi_scan_add_used(struct ubi_device *ubi, struct ubi_scan_info *si,
                                return err;
 
                        if (cmp_res & 4)
-                               err = add_to_list(si, seb->pnum, seb->ec,
-                                                 &si->corr);
+                               err = add_corrupted(si, seb->pnum, seb->ec);
                        else
                                err = add_to_list(si, seb->pnum, seb->ec,
                                                  &si->erase);
@@ -488,7 +511,7 @@ int ubi_scan_add_used(struct ubi_device *ubi, struct ubi_scan_info *si,
                         * previously.
                         */
                        if (cmp_res & 4)
-                               return add_to_list(si, pnum, ec, &si->corr);
+                               return add_corrupted(si, pnum, ec);
                        else
                                return add_to_list(si, pnum, ec, &si->erase);
                }
@@ -835,13 +858,13 @@ static int process_eb(struct ubi_device *ubi, struct ubi_scan_info *si,
                si->read_err_count += 1;
        case UBI_IO_BAD_HDR:
        case UBI_IO_FF_BITFLIPS:
-               err = add_to_list(si, pnum, ec, &si->corr);
+               err = add_corrupted(si, pnum, ec);
                if (err)
                        return err;
                goto adjust_mean_ec;
        case UBI_IO_FF:
                if (ec_err)
-                       err = add_to_list(si, pnum, ec, &si->corr);
+                       err = add_corrupted(si, pnum, ec);
                else
                        err = add_to_list(si, pnum, ec, &si->free);
                if (err)