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| author | Wei Yongjun <weiyongjun1@huawei.com> | 2017-05-16 17:22:47 +0300 |
|---|---|---|
| committer | Stefano Stabellini <sstabellini@kernel.org> | 2017-05-18 21:42:32 +0300 |
| commit | 14e3995e63759b80eb22a3c06958d105db4d3f79 (patch) | |
| tree | 683e8a787d1a45bb593c2f45a1042bd60428a79f | |
| parent | 69861e0a52f8733355ce246f0db15e1b240ad667 (diff) | |
| download | linux-14e3995e63759b80eb22a3c06958d105db4d3f79.tar.xz | |
xen/9pfs: fix return value check in xen_9pfs_front_probe()
In case of error, the function xenbus_read() returns ERR_PTR() and never
returns NULL. The NULL test in the return value check should be replaced
with IS_ERR().
Fixes: 71ebd71921e4 ("xen/9pfs: connect to the backend")
Signed-off-by: Wei Yongjun <weiyongjun1@huawei.com>
Reviewed-by: Stefano Stabellini <sstabellini@kernel.org>
| -rw-r--r-- | net/9p/trans_xen.c | 4 |
1 files changed, 2 insertions, 2 deletions
diff --git a/net/9p/trans_xen.c b/net/9p/trans_xen.c index 71e85643b3f9..83fe487f460e 100644 --- a/net/9p/trans_xen.c +++ b/net/9p/trans_xen.c @@ -454,8 +454,8 @@ static int xen_9pfs_front_probe(struct xenbus_device *dev, goto error_xenbus; } priv->tag = xenbus_read(xbt, dev->nodename, "tag", NULL); - if (!priv->tag) { - ret = -EINVAL; + if (IS_ERR(priv->tag)) { + ret = PTR_ERR(priv->tag); goto error_xenbus; } ret = xenbus_transaction_end(xbt, 0); |