[PATCH] iscsi: fix crypto_alloc_hash() error check

[Akinobu Mita <akinobu.mita@gmail.com>]

The return value of crypto_alloc_hash() should be checked by
IS_ERR().

Cc: Dmitry Yusupov <dmitry_yus@yahoo.com>
Cc: Alex Aizman <itn780@yahoo.com>
Signed-off-by: Akinobu Mita <akinobu.mita@gmail.com>

---
 drivers/scsi/iscsi_tcp.c |    4 ++--
 1 file changed, 2 insertions(+), 2 deletions(-)

Index: work-fault-inject/drivers/scsi/iscsi_tcp.c
===================================================================
--- work-fault-inject.orig/drivers/scsi/iscsi_tcp.c
+++ work-fault-inject/drivers/scsi/iscsi_tcp.c
@@ -1777,13 +1777,13 @@ iscsi_tcp_conn_create(struct iscsi_cls_s
 	tcp_conn->tx_hash.tfm = crypto_alloc_hash("crc32c", 0,
 						  CRYPTO_ALG_ASYNC);
 	tcp_conn->tx_hash.flags = 0;
-	if (!tcp_conn->tx_hash.tfm)
+	if (IS_ERR(tcp_conn->tx_hash.tfm))
 		goto free_tcp_conn;
 
 	tcp_conn->rx_hash.tfm = crypto_alloc_hash("crc32c", 0,
 						  CRYPTO_ALG_ASYNC);
 	tcp_conn->rx_hash.flags = 0;
-	if (!tcp_conn->rx_hash.tfm)
+	if (IS_ERR(tcp_conn->rx_hash.tfm))
 		goto free_tx_tfm;
 
 	return cls_conn;
-
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