[PATCH] dm kcopyd: error accumulation fix

kcopyd should accumulate errors - otherwise I/O failures may be ignored
unintentionally.

And invert 'success' (used in a future patch), using a more intuitive
!(read_err || write_err).

Signed-off-by: Jonathan Brassow <jbrassow@redhat.com>
Signed-off-by: Alasdair G Kergon <agk@redhat.com>
Signed-off-by: Andrew Morton <akpm@osdl.org>
Signed-off-by: Linus Torvalds <torvalds@osdl.org>

1 files changed, 2 insertions, 2 deletions

diff --git a/drivers/md/kcopyd.c b/drivers/md/kcopyd.c
index 72480a48d88b..73ab875fb158 100644
--- a/drivers/md/kcopyd.c
+++ b/drivers/md/kcopyd.c
@@ -314,7 +314,7 @@ static void complete_io(unsigned long error, void *context)
 
         if (error) {
                 if (job->rw == WRITE)
-                        job->write_err &= error;
+                        job->write_err |= error;
                 else
                         job->read_err = 1;
 
@@ -460,7 +460,7 @@ static void segment_complete(int read_err,
                 job->read_err = 1;
 
         if (write_err)
-                job->write_err &= write_err;
+                job->write_err |= write_err;
 
         /*
          * Only dispatch more work if there hasn't been an error.