octeontx2-pf: Fix an IS_ERR() vs NULL bug

The otx2_mbox_get_rsp() function never returns NULL, it returns error
pointers on error.

Fixes: 34bfe0ebedb7 ("octeontx2-pf: MTU, MAC and RX mode config support")
Signed-off-by: Dan Carpenter <dan.carpenter@oracle.com>
Signed-off-by: Jakub Kicinski <kuba@kernel.org>

diff --git a/drivers/net/ethernet/marvell/octeontx2/nic/otx2_common.c b/drivers/net/ethernet/marvell/octeontx2/nic/otx2_common.c
index 8247d21..b945bd3 100644 (file)
--- a/drivers/net/ethernet/marvell/octeontx2/nic/otx2_common.c
+++ b/drivers/net/ethernet/marvell/octeontx2/nic/otx2_common.c
@@ -171,9 +171,9 @@ static int otx2_hw_get_mac_addr(struct otx2_nic *pfvf,
        }
 
        msghdr = otx2_mbox_get_rsp(&pfvf->mbox.mbox, 0, &req->hdr);
-       if (!msghdr) {
+       if (IS_ERR(msghdr)) {
                otx2_mbox_unlock(&pfvf->mbox);
-               return -ENOMEM;
+               return PTR_ERR(msghdr);
        }
        rsp = (struct nix_get_mac_addr_rsp *)msghdr;
        ether_addr_copy(netdev->dev_addr, rsp->mac_addr);