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-rw-r--r--drivers/md/dm-writecache.c42
1 files changed, 21 insertions, 21 deletions
diff --git a/drivers/md/dm-writecache.c b/drivers/md/dm-writecache.c
index 7d727a72aa13..9b0a3bf6a4a1 100644
--- a/drivers/md/dm-writecache.c
+++ b/drivers/md/dm-writecache.c
@@ -442,7 +442,13 @@ static void writecache_notify_io(unsigned long error, void *context)
complete(&endio->c);
}
-static void ssd_commit_flushed(struct dm_writecache *wc)
+static void writecache_wait_for_ios(struct dm_writecache *wc, int direction)
+{
+ wait_event(wc->bio_in_progress_wait[direction],
+ !atomic_read(&wc->bio_in_progress[direction]));
+}
+
+static void ssd_commit_flushed(struct dm_writecache *wc, bool wait_for_ios)
{
struct dm_io_region region;
struct dm_io_request req;
@@ -488,17 +494,20 @@ static void ssd_commit_flushed(struct dm_writecache *wc)
writecache_notify_io(0, &endio);
wait_for_completion_io(&endio.c);
+ if (wait_for_ios)
+ writecache_wait_for_ios(wc, WRITE);
+
writecache_disk_flush(wc, wc->ssd_dev);
memset(wc->dirty_bitmap, 0, wc->dirty_bitmap_size);
}
-static void writecache_commit_flushed(struct dm_writecache *wc)
+static void writecache_commit_flushed(struct dm_writecache *wc, bool wait_for_ios)
{
if (WC_MODE_PMEM(wc))
wmb();
else
- ssd_commit_flushed(wc);
+ ssd_commit_flushed(wc, wait_for_ios);
}
static void writecache_disk_flush(struct dm_writecache *wc, struct dm_dev *dev)
@@ -522,12 +531,6 @@ static void writecache_disk_flush(struct dm_writecache *wc, struct dm_dev *dev)
writecache_error(wc, r, "error flushing metadata: %d", r);
}
-static void writecache_wait_for_ios(struct dm_writecache *wc, int direction)
-{
- wait_event(wc->bio_in_progress_wait[direction],
- !atomic_read(&wc->bio_in_progress[direction]));
-}
-
#define WFE_RETURN_FOLLOWING 1
#define WFE_LOWEST_SEQ 2
@@ -724,15 +727,12 @@ static void writecache_flush(struct dm_writecache *wc)
e = e2;
cond_resched();
}
- writecache_commit_flushed(wc);
-
- if (!WC_MODE_PMEM(wc))
- writecache_wait_for_ios(wc, WRITE);
+ writecache_commit_flushed(wc, true);
wc->seq_count++;
pmem_assign(sb(wc)->seq_count, cpu_to_le64(wc->seq_count));
writecache_flush_region(wc, &sb(wc)->seq_count, sizeof sb(wc)->seq_count);
- writecache_commit_flushed(wc);
+ writecache_commit_flushed(wc, false);
wc->overwrote_committed = false;
@@ -756,7 +756,7 @@ static void writecache_flush(struct dm_writecache *wc)
}
if (need_flush_after_free)
- writecache_commit_flushed(wc);
+ writecache_commit_flushed(wc, false);
}
static void writecache_flush_work(struct work_struct *work)
@@ -809,7 +809,7 @@ static void writecache_discard(struct dm_writecache *wc, sector_t start, sector_
}
if (discarded_something)
- writecache_commit_flushed(wc);
+ writecache_commit_flushed(wc, false);
}
static bool writecache_wait_for_writeback(struct dm_writecache *wc)
@@ -958,7 +958,7 @@ erase_this:
if (need_flush) {
writecache_flush_all_metadata(wc);
- writecache_commit_flushed(wc);
+ writecache_commit_flushed(wc, false);
}
wc_unlock(wc);
@@ -1342,7 +1342,7 @@ static void __writecache_endio_pmem(struct dm_writecache *wc, struct list_head *
wc->writeback_size--;
n_walked++;
if (unlikely(n_walked >= ENDIO_LATENCY)) {
- writecache_commit_flushed(wc);
+ writecache_commit_flushed(wc, false);
wc_unlock(wc);
wc_lock(wc);
n_walked = 0;
@@ -1423,7 +1423,7 @@ pop_from_list:
writecache_wait_for_ios(wc, READ);
}
- writecache_commit_flushed(wc);
+ writecache_commit_flushed(wc, false);
wc_unlock(wc);
}
@@ -1766,10 +1766,10 @@ static int init_memory(struct dm_writecache *wc)
write_original_sector_seq_count(wc, &wc->entries[b], -1, -1);
writecache_flush_all_metadata(wc);
- writecache_commit_flushed(wc);
+ writecache_commit_flushed(wc, false);
pmem_assign(sb(wc)->magic, cpu_to_le32(MEMORY_SUPERBLOCK_MAGIC));
writecache_flush_region(wc, &sb(wc)->magic, sizeof sb(wc)->magic);
- writecache_commit_flushed(wc);
+ writecache_commit_flushed(wc, false);
return 0;
}