diff mbox series

[4/5] wifi: rtw88: Remove redundant pci_clear_master

Message ID 20230323112613.7550-4-cai.huoqing@linux.dev
State New
Headers
Series [1/5] wifi: ath11k: Remove redundant pci_clear_master |

Commit Message

Cai Huoqing March 23, 2023, 11:26 a.m. UTC 
  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/net/wireless/realtek/rtw88/pci.c | 1 -
 1 file changed, 1 deletion(-)

Comments

Simon Horman March 26, 2023, 9:31 a.m. UTC | #1 
On Thu, Mar 23, 2023 at 07:26:12PM +0800, Cai Huoqing wrote:
> 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>

Reviewed-by: Simon Horman <simon.horman@corigine.com>
Ping-Ke Shih March 27, 2023, 12:36 a.m. UTC | #2 
> -----Original Message-----
> From: Cai Huoqing <cai.huoqing@linux.dev>
> Sent: Thursday, March 23, 2023 7:26 PM
> To: cai.huoqing@linux.dev
> Cc: Kalle Valo <kvalo@kernel.org>; David S. Miller <davem@davemloft.net>; Eric Dumazet
> <edumazet@google.com>; Jakub Kicinski <kuba@kernel.org>; Paolo Abeni <pabeni@redhat.com>; Yan-Hsuan Chuang
> <tony0620emma@gmail.com>; Ping-Ke Shih <pkshih@realtek.com>; ath10k@lists.infradead.org;
> linux-wireless@vger.kernel.org; netdev@vger.kernel.org; linux-kernel@vger.kernel.org;
> ath11k@lists.infradead.org; ath12k@lists.infradead.org
> Subject: [PATCH 4/5] wifi: rtw88: 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>

Reviewed-by: Ping-Ke Shih <pkshih@realtek.com>

> ---
>  drivers/net/wireless/realtek/rtw88/pci.c | 1 -
>  1 file changed, 1 deletion(-)
> 
> diff --git a/drivers/net/wireless/realtek/rtw88/pci.c b/drivers/net/wireless/realtek/rtw88/pci.c
> index b4bd831c9845..60145d2f3e5a 100644
> --- a/drivers/net/wireless/realtek/rtw88/pci.c
> +++ b/drivers/net/wireless/realtek/rtw88/pci.c
> @@ -1552,7 +1552,6 @@ static int rtw_pci_claim(struct rtw_dev *rtwdev, struct pci_dev *pdev)
> 
>  static void rtw_pci_declaim(struct rtw_dev *rtwdev, struct pci_dev *pdev)
>  {
> -       pci_clear_master(pdev);
>         pci_disable_device(pdev);
>  }
> 
> --
> 2.34.1
Kalle Valo March 31, 2023, 2:49 p.m. UTC | #3 
Cai Huoqing <cai.huoqing@linux.dev> wrote:

> 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>
> Reviewed-by: Simon Horman <simon.horman@corigine.com>
> Reviewed-by: Ping-Ke Shih <pkshih@realtek.com>

Patch applied to wireless-next.git, thanks.

e665c6d67e54 wifi: rtw88: Remove redundant pci_clear_master
diff mbox series

Patch

diff --git a/drivers/net/wireless/realtek/rtw88/pci.c b/drivers/net/wireless/realtek/rtw88/pci.c
index b4bd831c9845..60145d2f3e5a 100644
--- a/drivers/net/wireless/realtek/rtw88/pci.c
+++ b/drivers/net/wireless/realtek/rtw88/pci.c
@@ -1552,7 +1552,6 @@  static int rtw_pci_claim(struct rtw_dev *rtwdev, struct pci_dev *pdev)
 
 static void rtw_pci_declaim(struct rtw_dev *rtwdev, struct pci_dev *pdev)
 {
-	pci_clear_master(pdev);
 	pci_disable_device(pdev);
 }