NFS: Fix up return value on fatal errors in nfs_page_async_flush()
commit 8fc75bed96bb94e23ca51bd9be4daf65c57697bf upstream. Ensure that we return the fatal error value that caused us to exit nfs_page_async_flush(). Fixes: c373fff7 ("NFSv4: Don't special case "launder"") Signed-off-by: NTrond Myklebust <trond.myklebust@hammerspace.com> Cc: stable@vger.kernel.org # v4.12+ Reviewed-by: NBenjamin Coddington <bcodding@redhat.com> Signed-off-by: NAnna Schumaker <Anna.Schumaker@Netapp.com> Signed-off-by: NGreg Kroah-Hartman <gregkh@linuxfoundation.org>
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