UBI: do not forget to free internal volumes

UBI forgets to free internal volumes when detaching MTD device.
Fix this.

Pointed-out-by: Adrian Hunter <ext-adrian.hunter@nokia.com>
Signed-off-by: Artem Bityutskiy <Artem.Bityutskiy@nokia.com>

diff --git a/drivers/mtd/ubi/build.c b/drivers/mtd/ubi/build.c
index 7b42b4d..33205e4 100644 (file)
--- a/drivers/mtd/ubi/build.c
+++ b/drivers/mtd/ubi/build.c
@@ -422,6 +422,10 @@ out_unreg:
 /**
  * uif_close - close user interfaces for an UBI device.
  * @ubi: UBI device description object
+ *
+ * Note, since this function un-registers UBI volume device objects (@vol->dev),
+ * the memory allocated voe the volumes is freed as well (in the release
+ * function).
  */
 static void uif_close(struct ubi_device *ubi)
 {
@@ -431,6 +435,21 @@ static void uif_close(struct ubi_device *ubi)
        unregister_chrdev_region(ubi->cdev.dev, ubi->vtbl_slots + 1);
 }
 
+/**
+ * free_internal_volumes - free internal volumes.
+ * @ubi: UBI device description object
+ */
+static void free_internal_volumes(struct ubi_device *ubi)
+{
+       int i;
+
+       for (i = ubi->vtbl_slots;
+            i < ubi->vtbl_slots + UBI_INT_VOL_COUNT; i++) {
+               kfree(ubi->volumes[i]->eba_tbl);
+               kfree(ubi->volumes[i]);
+       }
+}
+
 /**
  * attach_by_scanning - attach an MTD device using scanning method.
  * @ubi: UBI device descriptor
@@ -475,6 +494,7 @@ static int attach_by_scanning(struct ubi_device *ubi)
 out_wl:
        ubi_wl_close(ubi);
 out_vtbl:
+       free_internal_volumes(ubi);
        vfree(ubi->vtbl);
 out_si:
        ubi_scan_destroy_si(si);
@@ -650,7 +670,7 @@ static int autoresize(struct ubi_device *ubi, int vol_id)
 
        /*
         * Clear the auto-resize flag in the volume in-memory copy of the
-        * volume table, and 'ubi_resize_volume()' will propogate this change
+        * volume table, and 'ubi_resize_volume()' will propagate this change
         * to the flash.
         */
        ubi->vtbl[vol_id].flags &= ~UBI_VTBL_AUTORESIZE_FLG;
@@ -659,7 +679,7 @@ static int autoresize(struct ubi_device *ubi, int vol_id)
                struct ubi_vtbl_record vtbl_rec;
 
                /*
-                * No avalilable PEBs to re-size the volume, clear the flag on
+                * No available PEBs to re-size the volume, clear the flag on
                 * flash and exit.
                 */
                memcpy(&vtbl_rec, &ubi->vtbl[vol_id],
@@ -692,7 +712,7 @@ static int autoresize(struct ubi_device *ubi, int vol_id)
  *
  * This function attaches MTD device @mtd_dev to UBI and assign @ubi_num number
  * to the newly created UBI device, unless @ubi_num is %UBI_DEV_NUM_AUTO, in
- * which case this function finds a vacant device nubert and assings it
+ * which case this function finds a vacant device number and assigns it
  * automatically. Returns the new UBI device number in case of success and a
  * negative error code in case of failure.
  *
@@ -841,6 +861,7 @@ out_uif:
        uif_close(ubi);
 out_detach:
        ubi_wl_close(ubi);
+       free_internal_volumes(ubi);
        vfree(ubi->vtbl);
 out_free:
        vfree(ubi->peb_buf1);
@@ -903,6 +924,7 @@ int ubi_detach_mtd_dev(int ubi_num, int anyway)
 
        uif_close(ubi);
        ubi_wl_close(ubi);
+       free_internal_volumes(ubi);
        vfree(ubi->vtbl);
        put_mtd_device(ubi->mtd);
        vfree(ubi->peb_buf1);