[PATCH 1/8] net: liquidio: Remove redundant pci_clear_master

From: Cai Huoqing
Date: Thu Mar 23 2023 - 05:03:39 EST


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@xxxxxxxxx>
---
drivers/net/ethernet/cavium/liquidio/lio_main.c | 1 -
drivers/net/ethernet/cavium/liquidio/lio_vf_main.c | 1 -
2 files changed, 2 deletions(-)

diff --git a/drivers/net/ethernet/cavium/liquidio/lio_main.c b/drivers/net/ethernet/cavium/liquidio/lio_main.c
index fd7c80edb6e8..9bd1d2d7027d 100644
--- a/drivers/net/ethernet/cavium/liquidio/lio_main.c
+++ b/drivers/net/ethernet/cavium/liquidio/lio_main.c
@@ -1129,7 +1129,6 @@ static void octeon_destroy_resources(struct octeon_device *oct)

fallthrough;
case OCT_DEV_PCI_ENABLE_DONE:
- pci_clear_master(oct->pci_dev);
/* Disable the device, releasing the PCI INT */
pci_disable_device(oct->pci_dev);

diff --git a/drivers/net/ethernet/cavium/liquidio/lio_vf_main.c b/drivers/net/ethernet/cavium/liquidio/lio_vf_main.c
index ac196883f07e..e2921aec3da0 100644
--- a/drivers/net/ethernet/cavium/liquidio/lio_vf_main.c
+++ b/drivers/net/ethernet/cavium/liquidio/lio_vf_main.c
@@ -577,7 +577,6 @@ static void octeon_destroy_resources(struct octeon_device *oct)

fallthrough;
case OCT_DEV_PCI_ENABLE_DONE:
- pci_clear_master(oct->pci_dev);
/* Disable the device, releasing the PCI INT */
pci_disable_device(oct->pci_dev);

--
2.34.1