bnxt_en: Disable/enable Bus master during suspend/resume. (ef02af8c) · Commits · 戴 / test

Disable Bus master during suspend to prevent DMAs after the device goes into D3hot state. The new 57500 devices may continue to DMA from context memory after the system goes into D3hot state. This may cause some PCIe errors on some system. Re-enable it during resume. Signed-off-by:

Michael Chan <michael.chan@broadcom.com> Signed-off-by:

Jakub Kicinski <jakub.kicinski@netronome.com>

drivers/net/ethernet/broadcom/bnxt/bnxt.c

+8 −0

Original line number	Diff line number	Diff line
		@@ -11921,6 +11921,7 @@ static int bnxt_suspend(struct device *device)
		rc = bnxt_close(dev);
		}
		bnxt_hwrm_func_drv_unrgtr(bp);
		pci_disable_device(bp->pdev);
		rtnl_unlock();
		return rc;
		}
		@@ -11932,6 +11933,13 @@ static int bnxt_resume(struct device *device)
		int rc = 0;

		rtnl_lock();
		rc = pci_enable_device(bp->pdev);
		if (rc) {
		netdev_err(dev, "Cannot re-enable PCI device during resume, err = %d\n",
		rc);
		goto resume_exit;
		}
		pci_set_master(bp->pdev);
		if (bnxt_hwrm_ver_get(bp) \|\| bnxt_hwrm_func_drv_rgtr(bp)) {
		rc = -ENODEV;
		goto resume_exit;

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