[PATCH] net/ism: Remove redundant pci_clear_master

Cai Huoqing
2023-03-23T12:02:50Z

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>
---
drivers/s390/net/ism_drv.c | 2 --
1 file changed, 2 deletions(-)

diff --git a/drivers/s390/net/ism_drv.c b/drivers/s390/net/ism_drv.c
index 05749c877990..8acb9eba691b 100644
--- a/drivers/s390/net/ism_drv.c
+++ b/drivers/s390/net/ism_drv.c
@@ -675,7 +675,6 @@ static int ism_probe(struct pci_dev *pdev, const struct pci_device_id *id)
return 0;

err_resource:
- pci_clear_master(pdev);
pci_release_mem_regions(pdev);
err_disable:
pci_disable_device(pdev);
@@ -738,7 +737,6 @@ static void ism_remove(struct pci_dev *pdev)
ism_dev_exit(ism);
mutex_unlock(&ism_dev_list.mutex);

- pci_clear_master(pdev);
pci_release_mem_regions(pdev);
pci_disable_device(pdev);
device_del(&ism->dev);
--
2.34.1