From: Markus Elfring <[email protected]> Date: Thu, 22 Aug 2019 20:02:56 +0200
The dev_kfree_skb() function performs also input parameter validation. Thus the test around the shown calls is not needed. This issue was detected by using the Coccinelle software. Signed-off-by: Markus Elfring <[email protected]> --- drivers/net/ethernet/amd/ni65.c | 6 ++---- drivers/net/ethernet/broadcom/bcmsysport.c | 3 +-- drivers/net/ethernet/broadcom/genet/bcmgenet.c | 11 +++-------- drivers/net/ethernet/freescale/gianfar.c | 3 +-- drivers/net/ethernet/ibm/ehea/ehea_main.c | 12 ++++-------- drivers/net/ethernet/intel/e1000/e1000_ethtool.c | 3 +-- drivers/net/ethernet/intel/e1000/e1000_main.c | 3 +-- drivers/net/ethernet/intel/e1000e/ethtool.c | 6 ++---- drivers/net/ethernet/intel/fm10k/fm10k_netdev.c | 3 +-- drivers/net/ethernet/intel/igb/igb_main.c | 3 +-- drivers/net/ethernet/intel/igc/igc_main.c | 3 +-- drivers/net/ethernet/micrel/ks8842.c | 4 +--- drivers/net/ethernet/microchip/lan743x_ptp.c | 3 +-- drivers/net/ethernet/packetengines/yellowfin.c | 3 +-- drivers/net/ethernet/qualcomm/qca_spi.c | 3 +-- drivers/net/ethernet/qualcomm/qca_uart.c | 3 +-- drivers/net/ethernet/sgi/meth.c | 3 +-- drivers/net/ethernet/smsc/smc91x.c | 3 +-- drivers/net/ethernet/stmicro/stmmac/stmmac_main.c | 3 +-- drivers/net/ethernet/sun/sunvnet_common.c | 3 +-- 20 files changed, 27 insertions(+), 57 deletions(-) diff --git a/drivers/net/ethernet/amd/ni65.c b/drivers/net/ethernet/amd/ni65.c index 87ff5d6d1b22..c6c2a54c1121 100644 --- a/drivers/net/ethernet/amd/ni65.c +++ b/drivers/net/ethernet/amd/ni65.c @@ -697,16 +697,14 @@ static void ni65_free_buffer(struct priv *p) for(i=0;i<TMDNUM;i++) { kfree(p->tmdbounce[i]); #ifdef XMT_VIA_SKB - if(p->tmd_skb[i]) - dev_kfree_skb(p->tmd_skb[i]); + dev_kfree_skb(p->tmd_skb[i]); #endif } for(i=0;i<RMDNUM;i++) { #ifdef RCV_VIA_SKB - if(p->recv_skb[i]) - dev_kfree_skb(p->recv_skb[i]); + dev_kfree_skb(p->recv_skb[i]); #else kfree(p->recvbounce[i]); #endif diff --git a/drivers/net/ethernet/broadcom/bcmsysport.c b/drivers/net/ethernet/broadcom/bcmsysport.c index 9483553ce444..6a47daec2302 100644 --- a/drivers/net/ethernet/broadcom/bcmsysport.c +++ b/drivers/net/ethernet/broadcom/bcmsysport.c @@ -708,8 +708,7 @@ static int bcm_sysport_alloc_rx_bufs(struct bcm_sysport_priv *priv) for (i = 0; i < priv->num_rx_bds; i++) { cb = &priv->rx_cbs[i]; skb = bcm_sysport_rx_refill(priv, cb); - if (skb) - dev_kfree_skb(skb); + dev_kfree_skb(skb); if (!cb->skb) return -ENOMEM; } diff --git a/drivers/net/ethernet/broadcom/genet/bcmgenet.c b/drivers/net/ethernet/broadcom/genet/bcmgenet.c index d3a0b614dbfa..8b19ddcdafaa 100644 --- a/drivers/net/ethernet/broadcom/genet/bcmgenet.c +++ b/drivers/net/ethernet/broadcom/genet/bcmgenet.c @@ -2515,19 +2515,14 @@ static int bcmgenet_dma_teardown(struct bcmgenet_priv *priv) static void bcmgenet_fini_dma(struct bcmgenet_priv *priv) { struct netdev_queue *txq; - struct sk_buff *skb; - struct enet_cb *cb; int i; bcmgenet_fini_rx_napi(priv); bcmgenet_fini_tx_napi(priv); - for (i = 0; i < priv->num_tx_bds; i++) { - cb = priv->tx_cbs + i; - skb = bcmgenet_free_tx_cb(&priv->pdev->dev, cb); - if (skb) - dev_kfree_skb(skb); - } + for (i = 0; i < priv->num_tx_bds; i++) + dev_kfree_skb(bcmgenet_free_tx_cb(&priv->pdev->dev, + priv->tx_cbs + i)); for (i = 0; i < priv->hw_params->tx_queues; i++) { txq = netdev_get_tx_queue(priv->dev, priv->tx_rings[i].queue); diff --git a/drivers/net/ethernet/freescale/gianfar.c b/drivers/net/ethernet/freescale/gianfar.c index 7ea19e173339..412c0340fed9 100644 --- a/drivers/net/ethernet/freescale/gianfar.c +++ b/drivers/net/ethernet/freescale/gianfar.c @@ -2005,8 +2005,7 @@ static void free_skb_rx_queue(struct gfar_priv_rx_q *rx_queue) struct rxbd8 *rxbdp = rx_queue->rx_bd_base; - if (rx_queue->skb) - dev_kfree_skb(rx_queue->skb); + dev_kfree_skb(rx_queue->skb); for (i = 0; i < rx_queue->rx_ring_size; i++) { struct gfar_rx_buff *rxb = &rx_queue->rx_buff[i]; diff --git a/drivers/net/ethernet/ibm/ehea/ehea_main.c b/drivers/net/ethernet/ibm/ehea/ehea_main.c index cca71ba7a74a..13e30eba5349 100644 --- a/drivers/net/ethernet/ibm/ehea/ehea_main.c +++ b/drivers/net/ethernet/ibm/ehea/ehea_main.c @@ -1577,20 +1577,16 @@ static int ehea_clean_portres(struct ehea_port *port, struct ehea_port_res *pr) ehea_destroy_eq(pr->eq); for (i = 0; i < pr->rq1_skba.len; i++) - if (pr->rq1_skba.arr[i]) - dev_kfree_skb(pr->rq1_skba.arr[i]); + dev_kfree_skb(pr->rq1_skba.arr[i]); for (i = 0; i < pr->rq2_skba.len; i++) - if (pr->rq2_skba.arr[i]) - dev_kfree_skb(pr->rq2_skba.arr[i]); + dev_kfree_skb(pr->rq2_skba.arr[i]); for (i = 0; i < pr->rq3_skba.len; i++) - if (pr->rq3_skba.arr[i]) - dev_kfree_skb(pr->rq3_skba.arr[i]); + dev_kfree_skb(pr->rq3_skba.arr[i]); for (i = 0; i < pr->sq_skba.len; i++) - if (pr->sq_skba.arr[i]) - dev_kfree_skb(pr->sq_skba.arr[i]); + dev_kfree_skb(pr->sq_skba.arr[i]); vfree(pr->rq1_skba.arr); vfree(pr->rq2_skba.arr); diff --git a/drivers/net/ethernet/intel/e1000/e1000_ethtool.c b/drivers/net/ethernet/intel/e1000/e1000_ethtool.c index a41008523c98..71d3d8854d8f 100644 --- a/drivers/net/ethernet/intel/e1000/e1000_ethtool.c +++ b/drivers/net/ethernet/intel/e1000/e1000_ethtool.c @@ -937,8 +937,7 @@ static void e1000_free_desc_rings(struct e1000_adapter *adapter) txdr->buffer_info[i].dma, txdr->buffer_info[i].length, DMA_TO_DEVICE); - if (txdr->buffer_info[i].skb) - dev_kfree_skb(txdr->buffer_info[i].skb); + dev_kfree_skb(txdr->buffer_info[i].skb); } } diff --git a/drivers/net/ethernet/intel/e1000/e1000_main.c b/drivers/net/ethernet/intel/e1000/e1000_main.c index 6b6ba1c38235..86493fea56e4 100644 --- a/drivers/net/ethernet/intel/e1000/e1000_main.c +++ b/drivers/net/ethernet/intel/e1000/e1000_main.c @@ -4175,8 +4175,7 @@ static bool e1000_clean_jumbo_rx_irq(struct e1000_adapter *adapter, /* an error means any chain goes out the window * too */ - if (rx_ring->rx_skb_top) - dev_kfree_skb(rx_ring->rx_skb_top); + dev_kfree_skb(rx_ring->rx_skb_top); rx_ring->rx_skb_top = NULL; goto next_desc; } diff --git a/drivers/net/ethernet/intel/e1000e/ethtool.c b/drivers/net/ethernet/intel/e1000e/ethtool.c index 08342698386d..de8c5818a305 100644 --- a/drivers/net/ethernet/intel/e1000e/ethtool.c +++ b/drivers/net/ethernet/intel/e1000e/ethtool.c @@ -1126,8 +1126,7 @@ static void e1000_free_desc_rings(struct e1000_adapter *adapter) buffer_info->dma, buffer_info->length, DMA_TO_DEVICE); - if (buffer_info->skb) - dev_kfree_skb(buffer_info->skb); + dev_kfree_skb(buffer_info->skb); } } @@ -1139,8 +1138,7 @@ static void e1000_free_desc_rings(struct e1000_adapter *adapter) dma_unmap_single(&pdev->dev, buffer_info->dma, 2048, DMA_FROM_DEVICE); - if (buffer_info->skb) - dev_kfree_skb(buffer_info->skb); + dev_kfree_skb(buffer_info->skb); } } diff --git a/drivers/net/ethernet/intel/fm10k/fm10k_netdev.c b/drivers/net/ethernet/intel/fm10k/fm10k_netdev.c index d3e85480f46d..09f7a246e134 100644 --- a/drivers/net/ethernet/intel/fm10k/fm10k_netdev.c +++ b/drivers/net/ethernet/intel/fm10k/fm10k_netdev.c @@ -253,8 +253,7 @@ static void fm10k_clean_rx_ring(struct fm10k_ring *rx_ring) if (!rx_ring->rx_buffer) return; - if (rx_ring->skb) - dev_kfree_skb(rx_ring->skb); + dev_kfree_skb(rx_ring->skb); rx_ring->skb = NULL; /* Free all the Rx ring sk_buffs */ diff --git a/drivers/net/ethernet/intel/igb/igb_main.c b/drivers/net/ethernet/intel/igb/igb_main.c index b63e77528a91..105b0624081a 100644 --- a/drivers/net/ethernet/intel/igb/igb_main.c +++ b/drivers/net/ethernet/intel/igb/igb_main.c @@ -4731,8 +4731,7 @@ static void igb_clean_rx_ring(struct igb_ring *rx_ring) { u16 i = rx_ring->next_to_clean; - if (rx_ring->skb) - dev_kfree_skb(rx_ring->skb); + dev_kfree_skb(rx_ring->skb); rx_ring->skb = NULL; /* Free all the Rx ring sk_buffs */ diff --git a/drivers/net/ethernet/intel/igc/igc_main.c b/drivers/net/ethernet/intel/igc/igc_main.c index e5114bebd30b..251552855c40 100644 --- a/drivers/net/ethernet/intel/igc/igc_main.c +++ b/drivers/net/ethernet/intel/igc/igc_main.c @@ -352,8 +352,7 @@ static void igc_clean_rx_ring(struct igc_ring *rx_ring) { u16 i = rx_ring->next_to_clean; - if (rx_ring->skb) - dev_kfree_skb(rx_ring->skb); + dev_kfree_skb(rx_ring->skb); rx_ring->skb = NULL; /* Free all the Rx ring sk_buffs */ diff --git a/drivers/net/ethernet/micrel/ks8842.c b/drivers/net/ethernet/micrel/ks8842.c index ccd06702cc56..da329ca115cc 100644 --- a/drivers/net/ethernet/micrel/ks8842.c +++ b/drivers/net/ethernet/micrel/ks8842.c @@ -580,9 +580,7 @@ static int __ks8842_start_new_rx_dma(struct net_device *netdev) dma_unmap_single(adapter->dev, sg_dma_address(sg), DMA_BUFFER_SIZE, DMA_FROM_DEVICE); sg_dma_address(sg) = 0; - if (ctl->skb) - dev_kfree_skb(ctl->skb); - + dev_kfree_skb(ctl->skb); ctl->skb = NULL; printk(KERN_ERR DRV_NAME": Failed to start RX DMA: %d\n", err); diff --git a/drivers/net/ethernet/microchip/lan743x_ptp.c b/drivers/net/ethernet/microchip/lan743x_ptp.c index b2109eca81fd..57b26c2acf87 100644 --- a/drivers/net/ethernet/microchip/lan743x_ptp.c +++ b/drivers/net/ethernet/microchip/lan743x_ptp.c @@ -963,8 +963,7 @@ void lan743x_ptp_close(struct lan743x_adapter *adapter) index++) { struct sk_buff *skb = ptp->tx_ts_skb_queue[index]; - if (skb) - dev_kfree_skb(skb); + dev_kfree_skb(skb); ptp->tx_ts_skb_queue[index] = NULL; ptp->tx_ts_seconds_queue[index] = 0; ptp->tx_ts_nseconds_queue[index] = 0; diff --git a/drivers/net/ethernet/packetengines/yellowfin.c b/drivers/net/ethernet/packetengines/yellowfin.c index 6f8d6584f809..5113ee647090 100644 --- a/drivers/net/ethernet/packetengines/yellowfin.c +++ b/drivers/net/ethernet/packetengines/yellowfin.c @@ -1258,8 +1258,7 @@ static int yellowfin_close(struct net_device *dev) yp->rx_skbuff[i] = NULL; } for (i = 0; i < TX_RING_SIZE; i++) { - if (yp->tx_skbuff[i]) - dev_kfree_skb(yp->tx_skbuff[i]); + dev_kfree_skb(yp->tx_skbuff[i]); yp->tx_skbuff[i] = NULL; } diff --git a/drivers/net/ethernet/qualcomm/qca_spi.c b/drivers/net/ethernet/qualcomm/qca_spi.c index b28360bc2255..5ecf61df78bd 100644 --- a/drivers/net/ethernet/qualcomm/qca_spi.c +++ b/drivers/net/ethernet/qualcomm/qca_spi.c @@ -837,8 +837,7 @@ qcaspi_netdev_uninit(struct net_device *dev) kfree(qca->rx_buffer); qca->buffer_size = 0; - if (qca->rx_skb) - dev_kfree_skb(qca->rx_skb); + dev_kfree_skb(qca->rx_skb); } static const struct net_device_ops qcaspi_netdev_ops = { diff --git a/drivers/net/ethernet/qualcomm/qca_uart.c b/drivers/net/ethernet/qualcomm/qca_uart.c index 590616846cd1..0981068504fa 100644 --- a/drivers/net/ethernet/qualcomm/qca_uart.c +++ b/drivers/net/ethernet/qualcomm/qca_uart.c @@ -285,8 +285,7 @@ static void qcauart_netdev_uninit(struct net_device *dev) { struct qcauart *qca = netdev_priv(dev); - if (qca->rx_skb) - dev_kfree_skb(qca->rx_skb); + dev_kfree_skb(qca->rx_skb); } static const struct net_device_ops qcauart_netdev_ops = { diff --git a/drivers/net/ethernet/sgi/meth.c b/drivers/net/ethernet/sgi/meth.c index 00660dd820e2..539bc5db989c 100644 --- a/drivers/net/ethernet/sgi/meth.c +++ b/drivers/net/ethernet/sgi/meth.c @@ -247,8 +247,7 @@ static void meth_free_tx_ring(struct meth_private *priv) /* Remove any pending skb */ for (i = 0; i < TX_RING_ENTRIES; i++) { - if (priv->tx_skbs[i]) - dev_kfree_skb(priv->tx_skbs[i]); + dev_kfree_skb(priv->tx_skbs[i]); priv->tx_skbs[i] = NULL; } dma_free_coherent(&priv->pdev->dev, TX_RING_BUFFER_SIZE, priv->tx_ring, diff --git a/drivers/net/ethernet/smsc/smc91x.c b/drivers/net/ethernet/smsc/smc91x.c index 601e76ad99a0..3a6761131f4c 100644 --- a/drivers/net/ethernet/smsc/smc91x.c +++ b/drivers/net/ethernet/smsc/smc91x.c @@ -378,8 +378,7 @@ static void smc_shutdown(struct net_device *dev) pending_skb = lp->pending_tx_skb; lp->pending_tx_skb = NULL; spin_unlock_irq(&lp->lock); - if (pending_skb) - dev_kfree_skb(pending_skb); + dev_kfree_skb(pending_skb); /* and tell the card to stay away from that nasty outside world */ SMC_SELECT_BANK(lp, 0); diff --git a/drivers/net/ethernet/stmicro/stmmac/stmmac_main.c b/drivers/net/ethernet/stmicro/stmmac/stmmac_main.c index bd1078433448..06ccd216ae90 100644 --- a/drivers/net/ethernet/stmicro/stmmac/stmmac_main.c +++ b/drivers/net/ethernet/stmicro/stmmac/stmmac_main.c @@ -3519,8 +3519,7 @@ static int stmmac_rx(struct stmmac_priv *priv, int limit, u32 queue) if (unlikely(error && (status & rx_not_ls))) goto read_again; if (unlikely(error)) { - if (skb) - dev_kfree_skb(skb); + dev_kfree_skb(skb); continue; } diff --git a/drivers/net/ethernet/sun/sunvnet_common.c b/drivers/net/ethernet/sun/sunvnet_common.c index 646e67236b65..8b94d9ad9e2b 100644 --- a/drivers/net/ethernet/sun/sunvnet_common.c +++ b/drivers/net/ethernet/sun/sunvnet_common.c @@ -1532,8 +1532,7 @@ sunvnet_start_xmit_common(struct sk_buff *skb, struct net_device *dev, else if (port) del_timer(&port->clean_timer); rcu_read_unlock(); - if (skb) - dev_kfree_skb(skb); + dev_kfree_skb(skb); vnet_free_skbs(freeskbs); dev->stats.tx_dropped++; return NETDEV_TX_OK; -- 2.23.0
