1 files changed, 27 insertions, 3 deletions

diff --git a/drivers/md/dm-log.c b/drivers/md/dm-log.c
index 6a9261351848..a503d12c2ff8 100644
--- a/drivers/md/dm-log.c
+++ b/drivers/md/dm-log.c
@@ -152,6 +152,7 @@ struct log_c {
         /*
          * Disk log fields
          */
+        int log_dev_failed;
         struct dm_dev *log_dev;
         struct log_header header;
 
@@ -315,6 +316,7 @@ static int create_log_context(struct dirty_log *log, struct dm_target *ti,
                 lc->disk_header = NULL;
         } else {
                 lc->log_dev = dev;
+                lc->log_dev_failed = 0;
                 lc->header_location.bdev = lc->log_dev->bdev;
                 lc->header_location.sector = 0;
 
@@ -437,6 +439,15 @@ static int count_bits32(uint32_t *addr, unsigned size)
         return count;
 }
 
+static void fail_log_device(struct log_c *lc)
+{
+        if (lc->log_dev_failed)
+                return;
+
+        lc->log_dev_failed = 1;
+        dm_table_event(lc->ti->table);
+}
+
 static int disk_resume(struct dirty_log *log)
 {
         int r;
@@ -446,8 +457,12 @@ static int disk_resume(struct dirty_log *log)
 
         /* read the disk header */
         r = read_header(lc);
-        if (r)
+        if (r) {
+                DMWARN("%s: Failed to read header on mirror log device",
+                       lc->log_dev->name);
+                fail_log_device(lc);
                 return r;
+        }
 
         /* set or clear any new bits -- device has grown */
         if (lc->sync == NOSYNC)
@@ -472,7 +487,14 @@ static int disk_resume(struct dirty_log *log)
         lc->header.nr_regions = lc->region_count;
 
         /* write the new header */
-        return write_header(lc);
+        r = write_header(lc);
+        if (r) {
+                DMWARN("%s: Failed to write header on mirror log device",
+                       lc->log_dev->name);
+                fail_log_device(lc);
+        }
+
+        return r;
 }
 
 static uint32_t core_get_region_size(struct dirty_log *log)
@@ -516,7 +538,9 @@ static int disk_flush(struct dirty_log *log)
                 return 0;
 
         r = write_header(lc);
-        if (!r)
+        if (r)
+                fail_log_device(lc);
+        else
                 lc->touched = 0;
 
         return r;