RE: [Intel-wired-lan] [PATCH 38/61] net: Prefer IS_ERR_OR_NULL over manual NULL check

> -----Original Message-----
> From: Intel-wired-lan <[email protected]> On Behalf
> Of Philipp Hahn
> Sent: Tuesday, March 10, 2026 12:49 PM
> To: [email protected]; [email protected];
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> [email protected]; [email protected];
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> [email protected]; [email protected]; [email protected];
> [email protected]; [email protected]; linux-
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> [email protected]; [email protected]; Philipp Hahn
> <[email protected]>
> Cc: Igor Russkikh <[email protected]>; Andrew Lunn
> <[email protected]>; David S. Miller <[email protected]>; Eric
> Dumazet <[email protected]>; Jakub Kicinski <[email protected]>; Paolo
> Abeni <[email protected]>; Pavan Chebbi <[email protected]>;
> Michael Chan <[email protected]>; Potnuri Bharat Teja
> <[email protected]>; Nguyen, Anthony L <[email protected]>;
> Kitszel, Przemyslaw <[email protected]>; Taras Chornyi
> <[email protected]>; Maxime Coquelin
> <[email protected]>; Alexandre Torgue
> <[email protected]>; Iyappan Subramanian
> <[email protected]>; Keyur Chudgar
> <[email protected]>; Quan Nguyen
> <[email protected]>; Heiner Kallweit <[email protected]>;
> Russell King <[email protected]>
> Subject: [Intel-wired-lan] [PATCH 38/61] net: Prefer IS_ERR_OR_NULL
> over manual NULL check
> 
> Prefer using IS_ERR_OR_NULL() over using IS_ERR() and a manual NULL
> check.
> 
> Change generated with coccinelle.
> 
> To: Igor Russkikh <[email protected]>
> To: Andrew Lunn <[email protected]>
> To: "David S. Miller" <[email protected]>
> To: Eric Dumazet <[email protected]>
> To: Jakub Kicinski <[email protected]>
> To: Paolo Abeni <[email protected]>
> To: Pavan Chebbi <[email protected]>
> To: Michael Chan <[email protected]>
> To: Potnuri Bharat Teja <[email protected]>
> To: Tony Nguyen <[email protected]>
> To: Przemek Kitszel <[email protected]>
> To: Taras Chornyi <[email protected]>
> To: Maxime Coquelin <[email protected]>
> To: Alexandre Torgue <[email protected]>
> To: Iyappan Subramanian <[email protected]>
> To: Keyur Chudgar <[email protected]>
> To: Quan Nguyen <[email protected]>
> To: Heiner Kallweit <[email protected]>
> To: Russell King <[email protected]>
> Cc: [email protected]
> Cc: [email protected]
> Cc: [email protected]
> Cc: [email protected]
> Cc: [email protected]
> Cc: [email protected]
> Signed-off-by: Philipp Hahn <[email protected]>
> ---
>  drivers/net/ethernet/aquantia/atlantic/aq_ring.c        | 2 +-
>  drivers/net/ethernet/broadcom/tg3.c                     | 2 +-
>  drivers/net/ethernet/chelsio/cxgb4/cxgb4_tc_flower.c    | 3 +--
>  drivers/net/ethernet/intel/ice/devlink/devlink.c        | 2 +-
>  drivers/net/ethernet/marvell/prestera/prestera_router.c | 2 +-
>  drivers/net/ethernet/stmicro/stmmac/stmmac_main.c       | 2 +-
>  drivers/net/mdio/mdio-xgene.c                           | 2 +-
>  drivers/net/usb/r8152.c                                 | 2 +-
>  8 files changed, 8 insertions(+), 9 deletions(-)
> 
> diff --git a/drivers/net/ethernet/aquantia/atlantic/aq_ring.c
> b/drivers/net/ethernet/aquantia/atlantic/aq_ring.c
> index
> e270327e47fd804cc8ee5cfd53ed1b993c955c41..43edef35c4b1ff606b2f1519a07f
> ad4c9a990ad4 100644
> --- a/drivers/net/ethernet/aquantia/atlantic/aq_ring.c
> +++ b/drivers/net/ethernet/aquantia/atlantic/aq_ring.c
> @@ -810,7 +810,7 @@ static int __aq_ring_xdp_clean(struct aq_ring_s
> *rx_ring,
>  		}
> 
>  		skb = aq_xdp_run_prog(aq_nic, &xdp, rx_ring, buff);
> -		if (IS_ERR(skb) || !skb)
> +		if (IS_ERR_OR_NULL(skb))
>  			continue;
> 
>  		if (ptp_hwtstamp_len > 0)
> diff --git a/drivers/net/ethernet/broadcom/tg3.c
> b/drivers/net/ethernet/broadcom/tg3.c
> index
> 2328fce336447eb4a796f9300ccc0ab536ff0a35..8ed79f34f03d81184dcc12e6eaff
> 009cb8f7756e 100644
> --- a/drivers/net/ethernet/broadcom/tg3.c
> +++ b/drivers/net/ethernet/broadcom/tg3.c
> @@ -7943,7 +7943,7 @@ static int tg3_tso_bug(struct tg3 *tp, struct
> tg3_napi *tnapi,
> 
>  	segs = skb_gso_segment(skb, tp->dev->features &
>  				    ~(NETIF_F_TSO | NETIF_F_TSO6));
> -	if (IS_ERR(segs) || !segs) {
> +	if (IS_ERR_OR_NULL(segs)) {
>  		tnapi->tx_dropped++;
>  		goto tg3_tso_bug_end;
>  	}
> diff --git a/drivers/net/ethernet/chelsio/cxgb4/cxgb4_tc_flower.c
> b/drivers/net/ethernet/chelsio/cxgb4/cxgb4_tc_flower.c
> index
> 3307e50426819087ad985178c4a5383f16b8e7b4..1c8a6445d4b2e3535d8f1b7908dd
> 02d8dd2f23fa 100644
> --- a/drivers/net/ethernet/chelsio/cxgb4/cxgb4_tc_flower.c
> +++ b/drivers/net/ethernet/chelsio/cxgb4/cxgb4_tc_flower.c
> @@ -1032,8 +1032,7 @@ static void ch_flower_stats_handler(struct
> work_struct *work)
>  	do {
>  		rhashtable_walk_start(&iter);
> 
> -		while ((flower_entry = rhashtable_walk_next(&iter)) &&
> -		       !IS_ERR(flower_entry)) {
> +		while (!IS_ERR_OR_NULL((flower_entry =
> rhashtable_walk_next(&iter))))
> +{
>  			ret = cxgb4_get_filter_counters(adap->port[0],
>  							flower_entry-
> >filter_id,
>  							&packets, &bytes,
> diff --git a/drivers/net/ethernet/intel/ice/devlink/devlink.c
> b/drivers/net/ethernet/intel/ice/devlink/devlink.c
> index
> 6c72bd15db6d75a1d4fa04ef8fefbd26fb6e84bd..3d08b9187fd76ca3198af28111b6
> f1c1765ea01e 100644
> --- a/drivers/net/ethernet/intel/ice/devlink/devlink.c
> +++ b/drivers/net/ethernet/intel/ice/devlink/devlink.c
> @@ -791,7 +791,7 @@ static void ice_traverse_tx_tree(struct devlink
> *devlink, struct ice_sched_node
>  						  node->parent->rate_node);
>  	}
> 
> -	if (rate_node && !IS_ERR(rate_node))
> +	if (!IS_ERR_OR_NULL(rate_node))
>  		node->rate_node = rate_node;
> 
>  traverse_children:
> diff --git a/drivers/net/ethernet/marvell/prestera/prestera_router.c
> b/drivers/net/ethernet/marvell/prestera/prestera_router.c
> index
> b036b173a308b5f994ad8538eb010fa27196988c..4492938e8a3da91d32efe8d45ccb
> e2eb437c0e49 100644
> --- a/drivers/net/ethernet/marvell/prestera/prestera_router.c
> +++ b/drivers/net/ethernet/marvell/prestera/prestera_router.c
> @@ -1061,7 +1061,7 @@ static void __prestera_k_arb_hw_state_upd(struct
> prestera_switch *sw,
>  		n = NULL;
>  	}
> 
> -	if (!IS_ERR(n) && n) {
> +	if (!IS_ERR_OR_NULL(n)) {
>  		neigh_event_send(n, NULL);
>  		neigh_release(n);
>  	} else {
> diff --git a/drivers/net/ethernet/stmicro/stmmac/stmmac_main.c
> b/drivers/net/ethernet/stmicro/stmmac/stmmac_main.c
> index
> 6827c99bde8c22db42b363d2d36ad6f26075ed50..356a4e9ce04b1fcf8786d7274d31
> ace404be2cf6 100644
> --- a/drivers/net/ethernet/stmicro/stmmac/stmmac_main.c
> +++ b/drivers/net/ethernet/stmicro/stmmac/stmmac_main.c
> @@ -1275,7 +1275,7 @@ static int stmmac_init_phy(struct net_device
> *dev)
>  	/* Some DT bindings do not set-up the PHY handle. Let's try to
>  	 * manually parse it
>  	 */
> -	if (!phy_fwnode || IS_ERR(phy_fwnode)) {
> +	if (IS_ERR_OR_NULL(phy_fwnode)) {
>  		int addr = priv->plat->phy_addr;
>  		struct phy_device *phydev;
> 
> diff --git a/drivers/net/mdio/mdio-xgene.c b/drivers/net/mdio/mdio-
> xgene.c index
> a8f91a4b7fed0927ee14e408000cd3a2bfb9b09a..09b30b563295c6085dc1358ac361
> 301e5cf6b2a8 100644
> --- a/drivers/net/mdio/mdio-xgene.c
> +++ b/drivers/net/mdio/mdio-xgene.c
> @@ -265,7 +265,7 @@ struct phy_device *xgene_enet_phy_register(struct
> mii_bus *bus, int phy_addr)
>  	struct phy_device *phy_dev;
> 
>  	phy_dev = get_phy_device(bus, phy_addr, false);
> -	if (!phy_dev || IS_ERR(phy_dev))
> +	if (IS_ERR_OR_NULL(phy_dev))
>  		return NULL;
> 
>  	if (phy_device_register(phy_dev))
> diff --git a/drivers/net/usb/r8152.c b/drivers/net/usb/r8152.c index
> 0c83bbbea2e7c322ee6339893e281237663bd3ae..73f17ebd7d40007eec5004f887a4
> 6249defd28ab 100644
> --- a/drivers/net/usb/r8152.c
> +++ b/drivers/net/usb/r8152.c
> @@ -2218,7 +2218,7 @@ static void r8152_csum_workaround(struct r8152
> *tp, struct sk_buff *skb,
> 
>  		features &= ~(NETIF_F_SG | NETIF_F_IPV6_CSUM |
> NETIF_F_TSO6);
>  		segs = skb_gso_segment(skb, features);
> -		if (IS_ERR(segs) || !segs)
> +		if (IS_ERR_OR_NULL(segs))
>  			goto drop;
> 
>  		__skb_queue_head_init(&seg_list);
> 
> --
> 2.43.0

Reviewed-by: Aleksandr Loktionov <[email protected]>