[PATCH 4.18 072/235] wan/fsl_ucc_hdlc: use IS_ERR_VALUE() to check return value of qe_muram_alloc

[Greg Kroah-Hartman]

4.18-stable review patch.  If anyone has any objections, please let me know.

------------------

From: YueHaibing <yuehaib...@huawei.com>

[ Upstream commit fd800f646402c0f85547166b59ca065175928b7b ]

qe_muram_alloc return a unsigned long integer,which should not
compared with zero. check it using IS_ERR_VALUE() to fix this.

Fixes: c19b6d246a35 ("drivers/net: support hdlc function for QE-UCC")
Signed-off-by: YueHaibing <yuehaib...@huawei.com>
Signed-off-by: David S. Miller <da...@davemloft.net>
Signed-off-by: Sasha Levin <alexander.le...@microsoft.com>
Signed-off-by: Greg Kroah-Hartman <gre...@linuxfoundation.org>
---
 drivers/net/wan/fsl_ucc_hdlc.c |    6 +++---
 1 file changed, 3 insertions(+), 3 deletions(-)

--- a/drivers/net/wan/fsl_ucc_hdlc.c
+++ b/drivers/net/wan/fsl_ucc_hdlc.c
@@ -192,7 +192,7 @@ static int uhdlc_init(struct ucc_hdlc_pr
        priv->ucc_pram_offset = qe_muram_alloc(sizeof(struct ucc_hdlc_param),
                                ALIGNMENT_OF_UCC_HDLC_PRAM);
 
-       if (priv->ucc_pram_offset < 0) {
+       if (IS_ERR_VALUE(priv->ucc_pram_offset)) {
                dev_err(priv->dev, "Can not allocate MURAM for hdlc 
parameter.\n");
                ret = -ENOMEM;
                goto free_tx_bd;
@@ -230,14 +230,14 @@ static int uhdlc_init(struct ucc_hdlc_pr
 
        /* Alloc riptr, tiptr */
        riptr = qe_muram_alloc(32, 32);
-       if (riptr < 0) {
+       if (IS_ERR_VALUE(riptr)) {
                dev_err(priv->dev, "Cannot allocate MURAM mem for Receive 
internal temp data pointer\n");
                ret = -ENOMEM;
                goto free_tx_skbuff;
        }
 
        tiptr = qe_muram_alloc(32, 32);
-       if (tiptr < 0) {
+       if (IS_ERR_VALUE(tiptr)) {
                dev_err(priv->dev, "Cannot allocate MURAM mem for Transmit 
internal temp data pointer\n");
                ret = -ENOMEM;
                goto free_riptr;