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alx: take rtnl before calling __alx_open from resume 

[ Upstream commit bc800e8b39 ]

The __alx_open function can be called from ndo_open, which is called
under RTNL, or from alx_resume, which isn't. Since commit d768319cd4,
we're calling the netif_set_real_num_{tx,rx}_queues functions, which
need to be called under RTNL.

This is similar to commit 0c2cc02e57 ("igb: Move the calls to set the
Tx and Rx queues into igb_open").

Fixes: d768319cd4 ("alx: enable multiple tx queues")
Signed-off-by: Sabrina Dubroca <sd@queasysnail.net>
Signed-off-by: David S. Miller <davem@davemloft.net>
Signed-off-by: Greg Kroah-Hartman <gregkh@linuxfoundation.org>
pull/10/head
Sabrina Dubroca 2018-06-29 17:51:26 +02:00 committed by Greg Kroah-Hartman
parent 03bb918775
commit c62e2f087a
1 changed files with 7 additions and 1 deletions
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8
drivers/net/ethernet/atheros/alx/main.c
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@ -1897,13 +1897,19 @@ static int alx_resume(struct device *dev)
struct pci_dev *pdev = to_pci_dev(dev);
struct alx_priv *alx = pci_get_drvdata(pdev);
struct alx_hw *hw = &alx->hw;
int err;
alx_reset_phy(hw);
if (!netif_running(alx->dev))
return 0;
netif_device_attach(alx->dev);
return __alx_open(alx, true);
rtnl_lock();
err = __alx_open(alx, true);
rtnl_unlock();
return err;
}
static SIMPLE_DEV_PM_OPS(alx_pm_ops, alx_suspend, alx_resume);