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NFSv4.1: put_layout_hdr can remove nfsi->layout

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Prevents an Oops triggered by CB_LAYOUTRECALL and LAYOUTGET race on a
pnfs_layout_hdr first pnfs_layout_segment.

Signed-off-by: Andy Adamson <andros@netapp.com>
Signed-off-by: Trond Myklebust <Trond.Myklebust@netapp.com>
This commit is contained in:
Andy Adamson 2011-03-01 01:34:07 +00:00 committed by Trond Myklebust
parent 6f78befc41
commit bf9c1387ca
1 changed files with 1 additions and 1 deletions
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fs/nfs/pnfs.c
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@ -768,7 +768,7 @@ pnfs_update_layout(struct inode *ino,
put_layout_hdr(lo); put_layout_hdr(lo);
out: out:
dprintk("%s end, state 0x%lx lseg %p\n", __func__, dprintk("%s end, state 0x%lx lseg %p\n", __func__,
nfsi->layout->plh_flags, lseg); nfsi->layout ? nfsi->layout->plh_flags : -1, lseg);
return lseg; return lseg;
out_unlock: out_unlock:
spin_unlock(&ino->i_lock); spin_unlock(&ino->i_lock);