Fix barrier fail detection in XFS

[linux-2.6-omap-h63xx.git] / fs / xfs / linux-2.6 / xfs_buf.c

diff --git a/fs/xfs/linux-2.6/xfs_buf.c b/fs/xfs/linux-2.6/xfs_buf.c
index a01daa7b5922bbcb88d4f45045c223456efe71ee..36d5fcd3f593d8694926e70181b1bade9a1df8b6 100644 (file)
--- a/fs/xfs/linux-2.6/xfs_buf.c
+++ b/fs/xfs/linux-2.6/xfs_buf.c
@@ -253,7 +253,7 @@ _xfs_buf_initialize(
 
        memset(bp, 0, sizeof(xfs_buf_t));
        atomic_set(&bp->b_hold, 1);
-       init_MUTEX_LOCKED(&bp->b_iodonesema);
+       init_completion(&bp->b_iowait);
        INIT_LIST_HEAD(&bp->b_list);
        INIT_LIST_HEAD(&bp->b_hash_list);
        init_MUTEX_LOCKED(&bp->b_sema); /* held, no waiters */
@@ -1001,12 +1001,13 @@ xfs_buf_iodone_work(
         * We can get an EOPNOTSUPP to ordered writes.  Here we clear the
         * ordered flag and reissue them.  Because we can't tell the higher
         * layers directly that they should not issue ordered I/O anymore, they
-        * need to check if the ordered flag was cleared during I/O completion.
+        * need to check if the _XFS_BARRIER_FAILED flag was set during I/O completion.
         */
        if ((bp->b_error == EOPNOTSUPP) &&
            (bp->b_flags & (XBF_ORDERED|XBF_ASYNC)) == (XBF_ORDERED|XBF_ASYNC)) {
                XB_TRACE(bp, "ordered_retry", bp->b_iodone);
                bp->b_flags &= ~XBF_ORDERED;
+               bp->b_flags |= _XFS_BARRIER_FAILED;
                xfs_buf_iorequest(bp);
        } else if (bp->b_iodone)
                (*(bp->b_iodone))(bp);
@@ -1033,7 +1034,7 @@ xfs_buf_ioend(
                        xfs_buf_iodone_work(&bp->b_iodone_work);
                }
        } else {
-               up(&bp->b_iodonesema);
+               complete(&bp->b_iowait);
        }
 }
 
@@ -1271,7 +1272,7 @@ xfs_buf_iowait(
        XB_TRACE(bp, "iowait", 0);
        if (atomic_read(&bp->b_io_remaining))
                blk_run_address_space(bp->b_target->bt_mapping);
-       down(&bp->b_iodonesema);
+       wait_for_completion(&bp->b_iowait);
        XB_TRACE(bp, "iowaited", (long)bp->b_error);
        return bp->b_error;
 }
@@ -1795,7 +1796,7 @@ int __init
 xfs_buf_init(void)
 {
 #ifdef XFS_BUF_TRACE
-       xfs_buf_trace_buf = ktrace_alloc(XFS_BUF_TRACE_SIZE, KM_SLEEP);
+       xfs_buf_trace_buf = ktrace_alloc(XFS_BUF_TRACE_SIZE, KM_NOFS);
 #endif
 
        xfs_buf_zone = kmem_zone_init_flags(sizeof(xfs_buf_t), "xfs_buf",