staging/lustre: fix return value check in libcfs_sock_ioctl()
authorWei Yongjun <yongjun_wei@trendmicro.com.cn>
Mon, 3 Jun 2013 02:08:13 +0000 (10:08 +0800)
committerGreg Kroah-Hartman <gregkh@linuxfoundation.org>
Mon, 3 Jun 2013 19:10:47 +0000 (12:10 -0700)
In case of error, the function sock_alloc_file() returns ERR_PTR()
and never returns NULL. The NULL test in the return value check
should be replaced with IS_ERR().

Signed-off-by: Wei Yongjun <yongjun_wei@trendmicro.com.cn>
Signed-off-by: Greg Kroah-Hartman <gregkh@linuxfoundation.org>

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