RDMA/IPoIB: Replace netdev_priv with ipoib_priv for ipoib_get_link_ksettings
ipoib_dev_init accesses the wrong private data for the IPoIB device. Commitcd565b4b51
(IB/IPoIB: Support acceleration options callbacks) changed ipoib_priv from being identical to netdev_priv to being an area inside of, but not the same pointer as, the netdev_priv pointer. As such, the struct we want is the ipoib_priv area, not the netdev_priv area, so use the right accessor, otherwise we kernel panic. [ 27.271938] IPv6: ADDRCONF(NETDEV_CHANGE): mlx5_ib0.8006: link becomes ready [ 28.156790] BUG: unable to handle kernel NULL pointer dereference at 000000000000067c [ 28.166309] IP: ib_query_port+0x30/0x180 [ib_core] ... [ 28.306282] RIP: 0010:ib_query_port+0x30/0x180 [ib_core] ... [ 28.393337] Call Trace: [ 28.397594] ipoib_get_link_ksettings+0x66/0xe0 [ib_ipoib] [ 28.405274] __ethtool_get_link_ksettings+0xa0/0x1c0 [ 28.412353] speed_show+0x74/0xa0 [ 28.417503] dev_attr_show+0x20/0x50 [ 28.422922] ? mutex_lock+0x12/0x40 [ 28.428179] sysfs_kf_seq_show+0xbf/0x1a0 [ 28.434002] kernfs_seq_show+0x21/0x30 [ 28.439470] seq_read+0x116/0x3b0 [ 28.444445] ? do_filp_open+0xa5/0x100 [ 28.449774] kernfs_fop_read+0xff/0x180 [ 28.455220] __vfs_read+0x37/0x150 [ 28.460167] ? security_file_permission+0x9d/0xc0 [ 28.466560] vfs_read+0x8c/0x130 [ 28.471318] SyS_read+0x55/0xc0 [ 28.475950] do_syscall_64+0x67/0x150 [ 28.481163] entry_SYSCALL64_slow_path+0x25/0x25 ... [ 28.584493] ---[ end trace 3549968a4bf0aa5d ]--- Fixes:cd565b4b51
(IB/IPoIB: Support acceleration options callbacks) Fixes:0d7e2d2166
(IB/ipoib: add get_link_ksettings in ethtool) Signed-off-by: Honggang Li <honli@redhat.com> Reviewed-by: Yuval Shaia <yuval.shaia@oracle.com> Reviewed-by: Leon Romanovsky <leonro@mellanox.com> Signed-off-by: Doug Ledford <dledford@redhat.com>
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@ -178,7 +178,7 @@ static inline int ib_speed_enum_to_int(int speed)
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static int ipoib_get_link_ksettings(struct net_device *netdev,
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struct ethtool_link_ksettings *cmd)
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{
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struct ipoib_dev_priv *priv = netdev_priv(netdev);
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struct ipoib_dev_priv *priv = ipoib_priv(netdev);
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struct ib_port_attr attr;
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int ret, speed, width;
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