diff mbox series

[net-next,04/11] can: ctucanfd: Remove redundant pci_clear_master

Message ID 20230327073354.1003134-5-mkl@pengutronix.de (mailing list archive)
State Accepted
Commit c9d23f9657cabfd2836a096bf6eddf8df2cf1434
Delegated to: Netdev Maintainers
Headers show
Series [net-next,01/11] can: rcar_canfd: Add transceiver support | expand

Checks

Context Check Description
netdev/series_format success Pull request is its own cover letter
netdev/tree_selection success Clearly marked for net-next, async
netdev/fixes_present success Fixes tag not required for -next series
netdev/header_inline success No static functions without inline keyword in header files
netdev/build_32bit success Errors and warnings before: 18 this patch: 18
netdev/cc_maintainers warning 5 maintainers not CCed: pabeni@redhat.com pisa@cmp.felk.cvut.cz edumazet@google.com ondrej.ille@gmail.com wg@grandegger.com
netdev/build_clang success Errors and warnings before: 18 this patch: 18
netdev/verify_signedoff success Signed-off-by tag matches author and committer
netdev/deprecated_api success None detected
netdev/check_selftest success No net selftest shell script
netdev/verify_fixes success No Fixes tag
netdev/build_allmodconfig_warn success Errors and warnings before: 18 this patch: 18
netdev/checkpatch success total: 0 errors, 0 warnings, 0 checks, 22 lines checked
netdev/kdoc success Errors and warnings before: 0 this patch: 0
netdev/source_inline success Was 0 now: 0

Commit Message

Marc Kleine-Budde March 27, 2023, 7:33 a.m. UTC 
From: Cai Huoqing <cai.huoqing@linux.dev>

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>
Link: https://lore.kernel.org/all/20230323113318.9473-2-cai.huoqing@linux.dev
Signed-off-by: Marc Kleine-Budde <mkl@pengutronix.de>
---
 drivers/net/can/ctucanfd/ctucanfd_pci.c | 8 ++------
 1 file changed, 2 insertions(+), 6 deletions(-)
diff mbox series

Patch

diff --git a/drivers/net/can/ctucanfd/ctucanfd_pci.c b/drivers/net/can/ctucanfd/ctucanfd_pci.c
index 8f2956a8ae43..9da09e7dd63a 100644
--- a/drivers/net/can/ctucanfd/ctucanfd_pci.c
+++ b/drivers/net/can/ctucanfd/ctucanfd_pci.c
@@ -206,10 +206,8 @@  static int ctucan_pci_probe(struct pci_dev *pdev,
 err_pci_iounmap_bar1:
 	pci_iounmap(pdev, addr);
 err_release_regions:
-	if (msi_ok) {
+	if (msi_ok)
 		pci_disable_msi(pdev);
-		pci_clear_master(pdev);
-	}
 	pci_release_regions(pdev);
 err_disable_device:
 	pci_disable_device(pdev);
@@ -257,10 +255,8 @@  static void ctucan_pci_remove(struct pci_dev *pdev)
 
 	pci_iounmap(pdev, bdata->bar1_base);
 
-	if (bdata->use_msi) {
+	if (bdata->use_msi)
 		pci_disable_msi(pdev);
-		pci_clear_master(pdev);
-	}
 
 	pci_release_regions(pdev);
 	pci_disable_device(pdev);