+ rapidio-tsi721-remove-redundant-pci_clear_master.patch added to mm-nonmm-unstable branch

+ rapidio-tsi721-remove-redundant-pci_clear_master.patch added to mm-nonmm-unstable branch

[Andrew Morton]

The patch titled
     Subject: rapidio/tsi721: remove redundant pci_clear_master
has been added to the -mm mm-nonmm-unstable branch.  Its filename is
     rapidio-tsi721-remove-redundant-pci_clear_master.patch

This patch will shortly appear at
     https://git.kernel.org/pub/scm/linux/kernel/git/akpm/25-new.git/tree/patches/rapidio-tsi721-remove-redundant-pci_clear_master.patch

This patch will later appear in the mm-nonmm-unstable branch at
    git://git.kernel.org/pub/scm/linux/kernel/git/akpm/mm

Before you just go and hit "reply", please:
   a) Consider who else should be cc'ed
   b) Prefer to cc a suitable mailing list as well
   c) Ideally: find the original patch on the mailing list and do a
      reply-to-all to that, adding suitable additional cc's

*** Remember to use Documentation/process/submit-checklist.rst when testing your code ***

The -mm tree is included into linux-next via the mm-everything
branch at git://git.kernel.org/pub/scm/linux/kernel/git/akpm/mm
and is updated there every 2-3 working days

------------------------------------------------------
From: Cai Huoqing <cai.huoqing@linux.dev>
Subject: rapidio/tsi721: remove redundant pci_clear_master
Date: Thu, 23 Mar 2023 19:37:09 +0800

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.

Link: https://lkml.kernel.org/r/20230323113711.10523-1-cai.huoqing@linux.dev
Signed-off-by: Cai Huoqing <cai.huoqing@linux.dev>
Cc: Alexandre Bounine <alex.bou9@gmail.com>
Cc: Matt Porter <mporter@kernel.crashing.org>
Cc: Tetsuo Handa <penguin-kernel@i-love.sakura.ne.jp>
Signed-off-by: Andrew Morton <akpm@linux-foundation.org>
---

 drivers/rapidio/devices/tsi721.c |    3 ---
 1 file changed, 3 deletions(-)

--- a/drivers/rapidio/devices/tsi721.c~rapidio-tsi721-remove-redundant-pci_clear_master
+++ a/drivers/rapidio/devices/tsi721.c
@@ -2924,7 +2924,6 @@ err_unmap_bars:
 		iounmap(priv->odb_base);
 err_free_res:
 	pci_release_regions(pdev);
-	pci_clear_master(pdev);
 err_disable_pdev:
 	pci_disable_device(pdev);
 err_clean:
@@ -2962,7 +2961,6 @@ static void tsi721_remove(struct pci_dev
 		pci_disable_msi(priv->pdev);
 #endif
 	pci_release_regions(pdev);
-	pci_clear_master(pdev);
 	pci_disable_device(pdev);
 	pci_set_drvdata(pdev, NULL);
 	kfree(priv);
@@ -2977,7 +2975,6 @@ static void tsi721_shutdown(struct pci_d
 
 	tsi721_disable_ints(priv);
 	tsi721_dma_stop_all(priv);
-	pci_clear_master(pdev);
 	pci_disable_device(pdev);
 }
 
_

Patches currently in -mm which might be from cai.huoqing@linux.dev are

rapidio-tsi721-remove-redundant-pci_clear_master.patch