NFSv4.1: Clear lseg pointer in ->doio function

Now that we have access to the pointer, clear it immediately after
the put, instead of in caller.
Signed-off-by: NFred Isaman <iisaman@netapp.com>
Signed-off-by: NTrond Myklebust <Trond.Myklebust@netapp.com>

fs/nfs/pagelist.c

@@ -312,7 +312,6 @@ static void nfs_pageio_doio(struct nfs_pageio_descriptor *desc)
 {
 	if (!list_empty(&desc->pg_list)) {
 		int error = desc->pg_doio(desc);
-		desc->pg_lseg = NULL;
 		if (error < 0)
 			desc->pg_error = error;
 		else

fs/nfs/read.c

@@ -311,6 +311,7 @@ static int nfs_pagein_multi(struct nfs_pageio_descriptor *desc)
 		nbytes -= rsize;
 	} while (nbytes != 0);
 	put_lseg(lseg);
+	desc->pg_lseg = NULL;
 
 	return ret;
 
@@ -357,6 +358,7 @@ static int nfs_pagein_one(struct nfs_pageio_descriptor *desc)
 				0, lseg);
 out:
 	put_lseg(lseg);
+	desc->pg_lseg = NULL;
 	return ret;
 }
 

fs/nfs/write.c

@@ -949,6 +949,7 @@ static int nfs_flush_multi(struct nfs_pageio_descriptor *desc)
 	} while (nbytes != 0);
 
 	put_lseg(lseg);
+	desc->pg_lseg = NULL;
 	return ret;
 
 out_bad:
@@ -1005,6 +1006,7 @@ static int nfs_flush_one(struct nfs_pageio_descriptor *desc)
 	ret = nfs_write_rpcsetup(req, data, &nfs_write_full_ops, desc->pg_count, 0, lseg, desc->pg_ioflags);
 out:
 	put_lseg(lseg); /* Cleans any gotten in ->pg_test */
+	desc->pg_lseg = NULL;
 	return ret;
 }