tree 9b04fd4e4f1149ce0b5927c9f9a89d26fa6a3d4a
parent a4190f90b4e22bde8b01b0086e00dd95439e2edd
author Dave Chinner <dchinner@redhat.com> 1279612379 +1000
committer Alex Elder <aelder@sgi.com> 1280168208 -0500

xfs: don't block on buffer read errors

xfs_buf_read() fails to detect dispatch errors before attempting to
wait on sychronous IO. If there was an error, it will get stuck
forever, waiting for an I/O that was never started. Make sure the
error is detected correctly.

Further, such a failure can leave locked pages in the page cache
which will cause a later operation to hang on the page. Ensure that
we correctly process pages in the buffers when we get a dispatch
error.

Signed-off-by: Dave Chinner <dchinner@redhat.com>
Reviewed-by: Christoph Hellwig <hch@lst.de>
Signed-off-by: Dave Chinner <david@fromorbit.com>