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Commit 96659828 authored by Amit Kumar Salecha's avatar Amit Kumar Salecha Committed by David S. Miller
Browse files

qlcnic: cleanup skb allocation 



No need to maintian separate state for alloced and freed skb.
This can be done by null check.

Signed-off-by: default avatarAmit Kumar Salecha <amit.salecha@qlogic.com>
Signed-off-by: default avatarDavid S. Miller <davem@davemloft.net>
parent 406818ff

drivers/net/qlcnic/qlcnic.h

+0 −2
Original line number Diff line number Diff line
@@ -381,7 +381,6 @@ struct qlcnic_rx_buffer { 
	struct sk_buff *skb;

	u64 dma;

	u16 ref_handle;

	u16 state;

};



/* Board types */
@@ -423,7 +422,6 @@ struct qlcnic_adapter_stats { 
	u64  xmit_on;

	u64  xmit_off;

	u64  skb_alloc_failure;

	u64  null_skb;

	u64  null_rxbuf;

	u64  rx_dma_map_error;

	u64  tx_dma_map_error;

drivers/net/qlcnic/qlcnic_ethtool.c

+0 −2
Original line number Diff line number Diff line
@@ -69,8 +69,6 @@ static const struct qlcnic_stats qlcnic_gstrings_stats[] = { 
		QLC_SIZEOF(stats.xmit_off), QLC_OFF(stats.xmit_off)},

	{"skb_alloc_failure", QLC_SIZEOF(stats.skb_alloc_failure),

		QLC_OFF(stats.skb_alloc_failure)},

	{"null skb",

		QLC_SIZEOF(stats.null_skb), QLC_OFF(stats.null_skb)},

	{"null rxbuf",

		QLC_SIZEOF(stats.null_rxbuf), QLC_OFF(stats.null_rxbuf)},

	{"rx dma map error", QLC_SIZEOF(stats.rx_dma_map_error),

drivers/net/qlcnic/qlcnic_init.c

+13 −17
Original line number Diff line number Diff line
@@ -112,13 +112,14 @@ void qlcnic_release_rx_buffers(struct qlcnic_adapter *adapter) 
		rds_ring = &recv_ctx->rds_rings[ring];

		for (i = 0; i < rds_ring->num_desc; ++i) {

			rx_buf = &(rds_ring->rx_buf_arr[i]);

			if (rx_buf->state == QLCNIC_BUFFER_FREE)

			if (rx_buf->skb == NULL)

				continue;



			pci_unmap_single(adapter->pdev,

					rx_buf->dma,

					rds_ring->dma_size,

					PCI_DMA_FROMDEVICE);

			if (rx_buf->skb != NULL)



			dev_kfree_skb_any(rx_buf->skb);

		}

	}
@@ -266,7 +267,6 @@ int qlcnic_alloc_sw_resources(struct qlcnic_adapter *adapter) 
			list_add_tail(&rx_buf->list,

					&rds_ring->free_list);

			rx_buf->ref_handle = i;

			rx_buf->state = QLCNIC_BUFFER_FREE;

			rx_buf++;

		}

		spin_lock_init(&rds_ring->lock);
@@ -1281,14 +1281,12 @@ qlcnic_alloc_rx_skb(struct qlcnic_adapter *adapter, 
	dma_addr_t dma;

	struct pci_dev *pdev = adapter->pdev;



	buffer->skb = dev_alloc_skb(rds_ring->skb_size);

	if (!buffer->skb) {

	skb = dev_alloc_skb(rds_ring->skb_size);

	if (!skb) {

		adapter->stats.skb_alloc_failure++;

		return -ENOMEM;

	}



	skb = buffer->skb;



	skb_reserve(skb, 2);



	dma = pci_map_single(pdev, skb->data,
@@ -1297,13 +1295,11 @@ qlcnic_alloc_rx_skb(struct qlcnic_adapter *adapter, 
	if (pci_dma_mapping_error(pdev, dma)) {

		adapter->stats.rx_dma_map_error++;

		dev_kfree_skb_any(skb);

		buffer->skb = NULL;

		return -ENOMEM;

	}



	buffer->skb = skb;

	buffer->dma = dma;

	buffer->state = QLCNIC_BUFFER_BUSY;



	return 0;

}
@@ -1316,14 +1312,15 @@ static struct sk_buff *qlcnic_process_rxbuf(struct qlcnic_adapter *adapter, 


	buffer = &rds_ring->rx_buf_arr[index];



	if (unlikely(buffer->skb == NULL)) {

		WARN_ON(1);

		return NULL;

	}



	pci_unmap_single(adapter->pdev, buffer->dma, rds_ring->dma_size,

			PCI_DMA_FROMDEVICE);



	skb = buffer->skb;

	if (!skb) {

		adapter->stats.null_skb++;

		goto no_skb;

	}



	if (likely(adapter->rx_csum && cksum == STATUS_CKSUM_OK)) {

		adapter->stats.csummed++;
@@ -1335,8 +1332,7 @@ static struct sk_buff *qlcnic_process_rxbuf(struct qlcnic_adapter *adapter, 
	skb->dev = adapter->netdev;



	buffer->skb = NULL;

no_skb:

	buffer->state = QLCNIC_BUFFER_FREE;



	return skb;

}
@@ -1511,7 +1507,7 @@ qlcnic_process_rcv_ring(struct qlcnic_host_sds_ring *sds_ring, int max) 


		WARN_ON(desc_cnt > 1);



		if (rxbuf)

		if (likely(rxbuf))

			list_add_tail(&rxbuf->list, &sds_ring->free_list[ring]);

		else

			adapter->stats.null_rxbuf++;