netdev - [PATCH 2/5] wifi: ath10k: Remove redundant pci_clear

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Message-Id: <20230323112613.7550-2-cai.huoqing@linux.dev>
Date:   Thu, 23 Mar 2023 19:26:10 +0800
From:   Cai Huoqing <cai.huoqing@...ux.dev>
To:     cai.huoqing@...ux.dev
Cc:     Kalle Valo <kvalo@...nel.org>,
        "David S. Miller" <davem@...emloft.net>,
        Eric Dumazet <edumazet@...gle.com>,
        Jakub Kicinski <kuba@...nel.org>,
        Paolo Abeni <pabeni@...hat.com>,
        Yan-Hsuan Chuang <tony0620emma@...il.com>,
        Ping-Ke Shih <pkshih@...ltek.com>, ath10k@...ts.infradead.org,
        linux-wireless@...r.kernel.org, netdev@...r.kernel.org,
        linux-kernel@...r.kernel.org, ath11k@...ts.infradead.org,
        ath12k@...ts.infradead.org
Subject: [PATCH 2/5] wifi: ath10k: 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@...ux.dev>
---
 drivers/net/wireless/ath/ath10k/pci.c | 6 +-----
 1 file changed, 1 insertion(+), 5 deletions(-)

diff --git a/drivers/net/wireless/ath/ath10k/pci.c b/drivers/net/wireless/ath/ath10k/pci.c
index 728d607289c3..a7f44f6335fb 100644
--- a/drivers/net/wireless/ath/ath10k/pci.c
+++ b/drivers/net/wireless/ath/ath10k/pci.c
@@ -3406,15 +3406,12 @@ static int ath10k_pci_claim(struct ath10k *ar)
 	if (!ar_pci->mem) {
 		ath10k_err(ar, "failed to iomap BAR%d\n", BAR_NUM);
 		ret = -EIO;
-		goto err_master;
+		goto err_region;
 	}
 
 	ath10k_dbg(ar, ATH10K_DBG_BOOT, "boot pci_mem 0x%pK\n", ar_pci->mem);
 	return 0;
 
-err_master:
-	pci_clear_master(pdev);
-
 err_region:
 	pci_release_region(pdev, BAR_NUM);
 
@@ -3431,7 +3428,6 @@ static void ath10k_pci_release(struct ath10k *ar)
 
 	pci_iounmap(pdev, ar_pci->mem);
 	pci_release_region(pdev, BAR_NUM);
-	pci_clear_master(pdev);
 	pci_disable_device(pdev);
 }
 
-- 
2.34.1