[PATCH] Avoid unnecessary ide-cd cache flushes

Only issue a cdrom cache flush if we've done write to the drive.  The
->media_written() flag keeps track of that.

Signed-off-by: Jens Axboe <axboe@suse.de>
Signed-off-by: Linus Torvalds <torvalds@osdl.org>

diff --git a/drivers/cdrom/cdrom.c b/drivers/cdrom/cdrom.c
index 9deca49c71f03cef89498a1e9e3e3ba7483e3ac8..beaa561f2ed888ad6780699b4ffb15bdc8796c93 100644 (file)
--- a/drivers/cdrom/cdrom.c
+++ b/drivers/cdrom/cdrom.c
@@ -645,7 +645,7 @@ static int cdrom_mrw_exit(struct cdrom_device_info *cdi)
                ret = cdrom_mrw_bgformat_susp(cdi, 0);
        }
 
-       if (!ret)
+       if (!ret && cdi->media_written)
                ret = cdrom_flush_cache(cdi);
 
        return ret;