ice: fix kernel BUG if register_netdev fails

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If register_netdev() fails, the driver will attempt to cleanup the
q_vectors and inadvertently trigger a kernel BUG due to a NULL pointer
dereference.

This occurs because cleaning up q_vectors attempts to call
netif_napi_del on napi_structs which were never initialized.

Resolve this by releasing the netdev in ice_cfg_netdev and setting
vsi->netdev to NULL. This ensures that after ice_cfg_netdev fails the
state is rewound to match as if ice_cfg_netdev was never called.

Signed-off-by: Jacob Keller <jacob.e.keller@intel.com>
Tested-by: Andrew Bowers <andrewx.bowers@intel.com>
Signed-off-by: Jeff Kirsher <jeffrey.t.kirsher@intel.com>

...

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Jacob Keller 2020-05-15 17:42:25 -07:00 • committed by Jeff Kirsher

parent bc3a024101

commit c2b313b783

1 changed files with 4 additions and 2 deletions

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6

drivers/net/ethernet/intel/ice/ice_main.c

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