ionic: check port ptr before use
[ Upstream commit2bcbf42add
] Check for corner case of port_init failure before using the port_info pointer. Fixes:4d03e00a21
("ionic: Add initial ethtool support") Signed-off-by: Shannon Nelson <snelson@pensando.io> Link: https://lore.kernel.org/r/20201104195606.61184-1-snelson@pensando.io Signed-off-by: Jakub Kicinski <kuba@kernel.org> Signed-off-by: Greg Kroah-Hartman <gregkh@linuxfoundation.org>
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@ -125,6 +125,11 @@ static int ionic_get_link_ksettings(struct net_device *netdev,
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ethtool_link_ksettings_zero_link_mode(ks, supported);
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if (!idev->port_info) {
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netdev_err(netdev, "port_info not initialized\n");
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return -EOPNOTSUPP;
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}
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/* The port_info data is found in a DMA space that the NIC keeps
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* up-to-date, so there's no need to request the data from the
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* NIC, we already have it in our memory space.
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