From: Dave Chinner <dchinner@redhat.com>
Date: Tue, 20 Jul 2010 07:52:59 +0000 (+1000)
Subject: xfs: don't block on buffer read errors
X-Git-Tag: v2.6.36-rc1~589^2~17
X-Git-Url: http://git.openpandora.org/cgi-bin/gitweb.cgi?a=commitdiff_plain;h=ec53d1dbb3ca960e7b552397613358ba1dbd12bd;p=pandora-kernel.git

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>
---

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