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authorCai Huoqing <cai.huoqing@linux.dev>2023-03-24 09:32:19 +0800
committerJon Mason <jdmason@kudzu.us>2023-07-08 11:02:37 -0400
commitf2748c6d768bbf3448da883a69e254816d7408b4 (patch)
tree259e7e8992159eea33c3499a1d0d5bd63eb547b0 /drivers/ntb
parentda6b4dc49e3c10e13adfb79fc41c098bacf1dc09 (diff)
ntb: epf: Remove redundant pci_clear_master
Remove pci_clear_master to simplify the code, the bus-mastering is also cleared in do_pci_disable_device, like this: ./drivers/pci/pci.c:2197 static void do_pci_disable_device(struct pci_dev *dev) { u16 pci_command; pci_read_config_word(dev, PCI_COMMAND, &pci_command); if (pci_command & PCI_COMMAND_MASTER) { pci_command &= ~PCI_COMMAND_MASTER; pci_write_config_word(dev, PCI_COMMAND, pci_command); } pcibios_disable_device(dev); }. And dev->is_busmaster is set to 0 in pci_disable_device. Signed-off-by: Cai Huoqing <cai.huoqing@linux.dev> Signed-off-by: Jon Mason <jdmason@kudzu.us>
Diffstat (limited to 'drivers/ntb')
-rw-r--r--drivers/ntb/hw/epf/ntb_hw_epf.c12
1 files changed, 4 insertions, 8 deletions
diff --git a/drivers/ntb/hw/epf/ntb_hw_epf.c b/drivers/ntb/hw/epf/ntb_hw_epf.c
index 3ece49cb18ff..b640aa0bf45e 100644
--- a/drivers/ntb/hw/epf/ntb_hw_epf.c
+++ b/drivers/ntb/hw/epf/ntb_hw_epf.c
@@ -591,7 +591,7 @@ static int ntb_epf_init_pci(struct ntb_epf_dev *ndev,
ret = dma_set_mask_and_coherent(dev, DMA_BIT_MASK(32));
if (ret) {
dev_err(dev, "Cannot set DMA mask\n");
- goto err_dma_mask;
+ goto err_pci_regions;
}
dev_warn(&pdev->dev, "Cannot DMA highmem\n");
}
@@ -599,14 +599,14 @@ static int ntb_epf_init_pci(struct ntb_epf_dev *ndev,
ndev->ctrl_reg = pci_iomap(pdev, ndev->ctrl_reg_bar, 0);
if (!ndev->ctrl_reg) {
ret = -EIO;
- goto err_dma_mask;
+ goto err_pci_regions;
}
if (ndev->peer_spad_reg_bar) {
ndev->peer_spad_reg = pci_iomap(pdev, ndev->peer_spad_reg_bar, 0);
if (!ndev->peer_spad_reg) {
ret = -EIO;
- goto err_dma_mask;
+ goto err_pci_regions;
}
} else {
spad_sz = 4 * readl(ndev->ctrl_reg + NTB_EPF_SPAD_COUNT);
@@ -617,14 +617,11 @@ static int ntb_epf_init_pci(struct ntb_epf_dev *ndev,
ndev->db_reg = pci_iomap(pdev, ndev->db_reg_bar, 0);
if (!ndev->db_reg) {
ret = -EIO;
- goto err_dma_mask;
+ goto err_pci_regions;
}
return 0;
-err_dma_mask:
- pci_clear_master(pdev);
-
err_pci_regions:
pci_disable_device(pdev);
@@ -642,7 +639,6 @@ static void ntb_epf_deinit_pci(struct ntb_epf_dev *ndev)
pci_iounmap(pdev, ndev->peer_spad_reg);
pci_iounmap(pdev, ndev->db_reg);
- pci_clear_master(pdev);
pci_release_regions(pdev);
pci_disable_device(pdev);
pci_set_drvdata(pdev, NULL);