cciss: Handle cases when cciss_add_disk fails.

Handle cases when cciss_add_disk fails.

Signed-off-by: Stephen M. Cameron <scameron@beardog.cce.hp.com>
Signed-off-by: Jens Axboe <jens.axboe@oracle.com>

1 files changed, 25 insertions, 10 deletions

diff --git a/drivers/block/cciss.c b/drivers/block/cciss.c
index b1211d530dae..ced71b006cd7 100644
--- a/drivers/block/cciss.c
+++ b/drivers/block/cciss.c
@@ -200,6 +200,7 @@ static int scan_thread(void *data);
 static int check_for_unit_attention(ctlr_info_t *h, CommandList_struct *c);
 static void cciss_hba_release(struct device *dev);
 static void cciss_device_release(struct device *dev);
+static void cciss_free_gendisk(ctlr_info_t *h, int drv_index);
 
 #ifdef CONFIG_PROC_FS
 static void cciss_procinit(int i);
@@ -1856,8 +1857,14 @@ static void cciss_update_drive_info(int ctlr, int drv_index, int first_time)
          * (raid_leve == -1) then we want to update the
          * logical drive's information.
          */
-        if (drv_index || first_time)
-                cciss_add_disk(h, disk, drv_index);
+        if (drv_index || first_time) {
+                if (cciss_add_disk(h, disk, drv_index) != 0) {
+                        cciss_free_gendisk(h, drv_index);
+                        printk(KERN_WARNING "cciss:%d could not update "
+                                "disk %d\n", h->ctlr, drv_index);
+                        --h->num_luns;
+                }
+        }
 
 freeret:
         kfree(inq_buff);
@@ -1891,6 +1898,12 @@ static int cciss_find_free_drive_index(int ctlr, int controller_node)
         return -1;
 }
 
+static void cciss_free_gendisk(ctlr_info_t *h, int drv_index)
+{
+        put_disk(h->gendisk[drv_index]);
+        h->gendisk[drv_index] = NULL;
+}
+
 /* cciss_add_gendisk finds a free hba[]->drv structure
  * and allocates a gendisk if needed, and sets the lunid
  * in the drvinfo structure.   It returns the index into
@@ -1931,8 +1944,7 @@ static int cciss_add_gendisk(ctlr_info_t *h, __u32 lunid, int controller_node)
         return drv_index;
 
 err_free_disk:
-        put_disk(h->gendisk[drv_index]);
-        h->gendisk[drv_index] = NULL;
+        cciss_free_gendisk(h, drv_index);
         return -1;
 }
 
@@ -1950,11 +1962,8 @@ static void cciss_add_controller_node(ctlr_info_t *h)
                 return;
 
         drv_index = cciss_add_gendisk(h, 0, 1);
-        if (drv_index == -1) {
-                printk(KERN_WARNING "cciss%d: could not "
-                        "add disk 0.\n", h->ctlr);
-                return;
-        }
+        if (drv_index == -1)
+                goto error;
         h->drv[drv_index].block_size = 512;
         h->drv[drv_index].nr_blocks = 0;
         h->drv[drv_index].heads = 0;
@@ -1963,7 +1972,13 @@ static void cciss_add_controller_node(ctlr_info_t *h)
         h->drv[drv_index].raid_level = -1;
         memset(h->drv[drv_index].serial_no, 0, 16);
         disk = h->gendisk[drv_index];
-        cciss_add_disk(h, disk, drv_index);
+        if (cciss_add_disk(h, disk, drv_index) == 0)
+                return;
+        cciss_free_gendisk(h, drv_index);
+error:
+        printk(KERN_WARNING "cciss%d: could not "
+                "add disk 0.\n", h->ctlr);
+        return;
 }
 
 /* This function will add and remove logical drives from the Logical