[PATCH 1/5] xfs: remove dead ENODEV handling in xfs_destroy_ioend

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No driver returns ENODEV from it bio completion handler, not has this
ever been documented.  Remove the dead code dealing with it.

Signed-off-by: Christoph Hellwig <hch@xxxxxx>

Index: xfs/fs/xfs/xfs_aops.c
===================================================================
--- xfs.orig/fs/xfs/xfs_aops.c	2011-07-28 17:22:27.277106627 +0200
+++ xfs/fs/xfs/xfs_aops.c	2011-07-28 17:24:19.016501283 +0200
@@ -122,17 +122,6 @@ xfs_destroy_ioend(
 		bh->b_end_io(bh, !ioend->io_error);
 	}
 
-	/*
-	 * Volume managers supporting multiple paths can send back ENODEV
-	 * when the final path disappears.  In this case continuing to fill
-	 * the page cache with dirty data which cannot be written out is
-	 * evil, so prevent that.
-	 */
-	if (unlikely(ioend->io_error == -ENODEV)) {
-		xfs_do_force_shutdown(ip->i_mount, SHUTDOWN_DEVICE_REQ,
-				      __FILE__, __LINE__);
-	}
-
 	xfs_ioend_wake(ip);
 	mempool_free(ioend, xfs_ioend_pool);
 }

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