Received-SPF: pass (google.com: domain of linux-kernel-owner@vger.kernel.org designates 2620:137:e000::1:20 as permitted sender) client-ip=2620:137:e000::1:20;
From:   Cai Huoqing <cai.huoqing@linux.dev>
To:     cai.huoqing@linux.dev
Cc:     Karsten Keil <isdn@linux-pingi.de>,
        Yang Yingliang <yangyingliang@huawei.com>,
        "David S. Miller" <davem@davemloft.net>, netdev@vger.kernel.org,
        linux-kernel@vger.kernel.org
Subject: [PATCH] isdn: mISDN: netjet: Remove redundant pci_clear_master
Date:   Thu, 23 Mar 2023 19:59:11 +0800
Message-Id: <20230323115912.14443-1-cai.huoqing@linux.dev>
MIME-Version: 1.0
Content-Transfer-Encoding: 8bit
Precedence: bulk

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/isdn/hardware/mISDN/netjet.c | 1 -
 1 file changed, 1 deletion(-)

diff --git a/drivers/isdn/hardware/mISDN/netjet.c b/drivers/isdn/hardware/mISDN/netjet.c
index f8447135a902..566c790a9481 100644
--- a/drivers/isdn/hardware/mISDN/netjet.c
+++ b/drivers/isdn/hardware/mISDN/netjet.c
@@ -970,7 +970,6 @@ nj_release(struct tiger_hw *card)
 	write_lock_irqsave(&card_lock, flags);
 	list_del(&card->list);
 	write_unlock_irqrestore(&card_lock, flags);
-	pci_clear_master(card->pdev);
 	pci_disable_device(card->pdev);
 	pci_set_drvdata(card->pdev, NULL);
 	kfree(card);
-- 
2.34.1