From: Benjamin Poirier <bpoirier@suse.com>
Date: Mon, 6 May 2019 16:05:47 +0900
Subject: qlge: Remove useless dma synchronization calls
Patch-mainline: v5.5-rc1
Git-commit: cf1c2987bfd890a9c4ef3f174ed6148ec9b2b622
References: bsc#1106061
This is unneeded for two reasons:
1) the cpu does not write data for the device in the mapping
2) calls like ..._sync_..._for_device(..., ..._FROMDEVICE) are
nonsensical, see commit 3f0fb4e85b38 ("Documentation/DMA-API-HOWTO.txt:
fix misleading example")
Signed-off-by: Benjamin Poirier <bpoirier@suse.com>
---
drivers/net/ethernet/qlogic/qlge/qlge_main.c | 12 ------------
1 file changed, 12 deletions(-)
--- a/drivers/net/ethernet/qlogic/qlge/qlge_main.c
+++ b/drivers/net/ethernet/qlogic/qlge/qlge_main.c
@@ -1110,9 +1110,6 @@ static void ql_update_lbq(struct ql_adap
dma_unmap_addr_set(lbq_desc, mapaddr, map);
*lbq_desc->addr = cpu_to_le64(map);
- pci_dma_sync_single_for_device(qdev->pdev, map,
- qdev->lbq_buf_size,
- PCI_DMA_FROMDEVICE);
clean_idx++;
if (clean_idx == rx_ring->lbq_len)
clean_idx = 0;
@@ -1598,10 +1595,6 @@ static void ql_process_mac_rx_skb(struct
skb_put_data(new_skb, skb->data, length);
- pci_dma_sync_single_for_device(qdev->pdev,
- dma_unmap_addr(sbq_desc, mapaddr),
- SMALL_BUF_MAP_SIZE,
- PCI_DMA_FROMDEVICE);
skb = new_skb;
/* Frame error, so drop the packet. */
@@ -1757,11 +1750,6 @@ static struct sk_buff *ql_build_rx_skb(s
SMALL_BUF_MAP_SIZE,
PCI_DMA_FROMDEVICE);
skb_put_data(skb, sbq_desc->p.skb->data, length);
- pci_dma_sync_single_for_device(qdev->pdev,
- dma_unmap_addr(sbq_desc,
- mapaddr),
- SMALL_BUF_MAP_SIZE,
- PCI_DMA_FROMDEVICE);
} else {
netif_printk(qdev, rx_status, KERN_DEBUG, qdev->ndev,
"%d bytes in a single small buffer.\n",