netdev - [PATCH net-next 2/2] e1000e: Remove the runtime suspend restriction on CNP+

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Date:   Mon, 15 Mar 2021 12:02:31 -0700
From:   Tony Nguyen <anthony.l.nguyen@...el.com>
To:     davem@...emloft.net, kuba@...nel.org
Cc:     Chen Yu <yu.c.chen@...el.com>, netdev@...r.kernel.org,
        sassmann@...hat.com, anthony.l.nguyen@...el.com,
        kai.heng.feng@...onical.com, rjw@...ysocki.net,
        len.brown@...el.com, todd.e.brandt@...el.com,
        sasha.neftin@...el.com, vitaly.lifshits@...el.com,
        Dvora Fuxbrumer <dvorax.fuxbrumer@...ux.intel.com>
Subject: [PATCH net-next 2/2] e1000e: Remove the runtime suspend restriction on CNP+

From: Chen Yu <yu.c.chen@...el.com>

Although there is platform issue of runtime suspend support
on CNP, it would be more flexible to let the user decide whether
to disable runtime or not because:
1. This can be done in userspace via
   echo on > /sys/devices/pci0000\:00/0000\:00\:1f.d/power/control
2. More and more NICs would support runtime suspend, disabling the
   runtime suspend on them by default would impact the validation.

Only disable runtime suspend on CNP in case of any user space regression.

Signed-off-by: Chen Yu <yu.c.chen@...el.com>
Tested-by: Dvora Fuxbrumer <dvorax.fuxbrumer@...ux.intel.com>
Signed-off-by: Tony Nguyen <anthony.l.nguyen@...el.com>
---
 drivers/net/ethernet/intel/e1000e/netdev.c | 2 +-
 1 file changed, 1 insertion(+), 1 deletion(-)

diff --git a/drivers/net/ethernet/intel/e1000e/netdev.c b/drivers/net/ethernet/intel/e1000e/netdev.c
index 8cd1b3e9e514..39ca02b7fdc5 100644
--- a/drivers/net/ethernet/intel/e1000e/netdev.c
+++ b/drivers/net/ethernet/intel/e1000e/netdev.c
@@ -7635,7 +7635,7 @@ static int e1000_probe(struct pci_dev *pdev, const struct pci_device_id *ent)
 
 	dev_pm_set_driver_flags(&pdev->dev, DPM_FLAG_SMART_PREPARE);
 
-	if (pci_dev_run_wake(pdev) && hw->mac.type < e1000_pch_cnp)
+	if (pci_dev_run_wake(pdev) && hw->mac.type != e1000_pch_cnp)
 		pm_runtime_put_noidle(&pdev->dev);
 
 	return 0;
-- 
2.26.2